Pest control on the site: scoop. How to Get Rid of Cutworm Caterpillars: Common Methods and Precautions
The garden scoop is a polyphagous pest. Damages cruciferous crops, tomatoes, potatoes, beets, rhubarb, cucumbers, strawberries, sunflowers, tobacco, poppies and many others. The development is complete. Reproduction is bisexual. Pupae overwinter in the soil. One generation develops in the north of the range, two in the south.
Garden scoop: control measures,
(tomato, cabbage, swede, turnip, cucumber, radish)
The most dangerous for almost all cultivated crops is garden scoop . It is distributed almost throughout the territory of the countries of the former Soviet Union.
The list of plants affected by it includes about 40 crops. When growing vegetables in open ground poses a particular danger to tomatoes, cabbage, rutabaga, turnips, cucumbers, and radishes.
It also causes tangible harm to tomatoes and cucumbers grown in film greenhouses.
Owl Butterfly leads a nocturnal lifestyle. Harm is caused by its larvae - caterpillars. caterpillars younger ages they feed on leaves, skeletonizing them from the underside. Adult caterpillars eat the leaves completely, and also feed on the pulp of the fruit, gnawing through large irregular shape holes.
Garden scoop is a butterfly up to 4 cm in wingspan, front wings are reddish-brown with light wavy transverse stripes along the edges. Each wing has two round spots. The hindwings are light grey.
The butterfly has bicolor wings of brown and red with two spots of yellow and gray color on a surface. Caterpillars are both green and brown.
The garden scoop can give two generations in the southern regions and one in the northern ones. Corn, millet, sugar beets are the first crops that begin to infect young caterpillars. Then they move to cereal and melon plants.
Successfully enduring wintering at a depth of up to 25 cm, the caterpillars rise to the surface and, with the onset of heat, pupate. In mid-June, butterflies appear, the life span of which lasts until August. The females lay eggs on inside leaves on absolutely all nearby plants. The caterpillars that have appeared gnaw through the leaves of plants, and also infect unripe tomato fruits.
Young caterpillar and damage
Adult caterpillar and damage
Measures to combat the garden scoop
- Deep autumn plowing;
- Thorough pre-sowing tillage;
- Destruction of all weeds, especially deaf nettle, quinoa, white mari, on which the scoop especially likes to lay its eggs;
- Spraying with compounds used to destroy cabbage scoops;
- Row application of granular insecticides.
How to destroy?
use different ways control of this pest
- Catching butterflies for bait.
- Collecting caterpillars during the harvest.
In the people for the level of harm caused, the winter scoop is called the northern locust. In regions with winter crops - winter worm. Under optimal conditions environment one female lays from 600 to 2247 eggs, of which the yield of caterpillars is up to 95-98%. In 20-25 minutes after emerging from the chrysalis, young cutworms are ready for flights and feeding. More than 100 species of cutworms harm plants on the soil surface (leaf-eating) and in top layer soil (gnawing). All scoops are polyphages, which makes it difficult to fight them, and they survive better in the struggle for life and procreation. It is impossible to completely get rid of scoops (flight uniforms provide flights over long distances), but you can minimize their number by using different methods struggle, the leading role in which belongs to preventive and agrotechnical measures.
Affected crops and the level of harmfulness of the winter cutworm
Caterpillars of the winter cutworm damage more than 140 plant species of 36 families. They are divided into leaf-eating, intrastem and gnawing, which destroy root system plants. For a day, one scoop destroys 10-20 sugar beet roots. It harasses sunflower, corn, tobacco, millet, cotton, by summer it switches to vegetable and industrial crops, including pumpkin, marrow, gourds, peas, potatoes, and in autumn populates winter and winter crops. The caterpillar, eating up the roots, destroys the planting of grapes and seedlings of young gardens. Of the weeds, scoops prefer to settle and feed on the roots of plantain, thistle, bindweed.
Winter scoop populated the entire European part of the Russian Federation, except for Far North and dry zones. The area of damage covers the non-chernozem, steppe, forest-steppe, northern zones, and the Northern Volga region. Far East, southern Siberia, the Urals, North Caucasus. The number of generations in the regions of Russia is related to climatic conditions. In northern regions with insufficient heat, one generation develops winter cutworm. In the southern up to 3-4 fully developed generations.
Description of the winter scoop
winter scoop (Agrotis segetum) is especially dangerous pests. The unremarkable appearance and modest size of the butterfly are deceptive. The length of the body does not exceed 1.8-2.2 cm with a wingspan of up to 3.0-5.0 cm. lines that are broken or curved. The color of the front wings of males is lighter than that of females. In females, the hindwings are gray-dirty, their outer edge is bordered with a gray stripe. Males have white hindwings. The head and thorax of the insect are covered with bristles. The oral apparatus is represented by a long strong proboscis. The antennae of females are filiform, those of males are broken-comb. Butterflies are active at dusk, feeding mainly at night. For night feeding, the winter scoop is also called the winter night bat.
The scoop caterpillar is large, shiny, in external color - greenish hues. The peel is covered with fine grains. Longitudinal dark stripes stand out on the sides. The length of the body varies between 4.0-5.0 cm. The caterpillar has 8 pairs of legs: 3 pairs of thoracic and 5 pairs of abdominal ones.
The development cycle and reproduction of the winter cutworm
In its development, the scoop goes through all stages from the egg to the emergence of the butterfly. During the warm season, the pest produces one generation in the northern regions, and 2-4 generations in regions with a long warm period. The duration of generation development takes 50-70 days and depends on temperature conditions. In cold and wet summers, the cutworm lays a very small number of eggs (up to 40-50), under optimal conditions - more than 2000. For clutches, it selects well-heated areas with loose soil, sparse flowering herbage. After leaving the egg, the caterpillar passes through 6 instars, turns into a pronymph in the summer generation, then into a chrysalis, and after 10-12 days a butterfly appears, which is ready to fly in 10-25 minutes. Intensified summer is observed at night when the air temperature is above +12*C. Butterfly's main food is nectar. flowering plants. The life of adults of the winter scoop is limited to 5-40 days and is all devoted to mating and laying eggs.
Adult caterpillars of the 6th age stage go into wintering, younger ones die from frost. They hibernate in a 20-25 cm layer of soil and withstand temperatures down to -11*C. In the spring, when the soil warms up to + 10 * C, they rise to the upper layers of the soil, where they pupate and transform into butterflies. Thus, weak point in the development of the winter cutworm is the laying of autumn eggs and the departure of caterpillars for wintering, the spring rise of caterpillars to the upper 10 cm layer of soil for pupation. Deep digging in autumn and spring will contribute to the destruction of a significant number of pests. The missed opportunity will lead to a mass flight of the first generation of butterflies in May and the second generation in July. Every 5-10 days, young caterpillars will hatch from the eggs, and the previous ones will grow up. Pests of all ages will feed heavily until mid-October. Adults who have reached the 6th age will migrate to the soil for wintering. In the second half of August, the butterflies will lay their eggs, from which the caterpillars of the first generation of the next year will hatch, and from May the cycle of development of the winter cutworm will begin anew.
Methods of dealing with winter scoop
Signs of damage to vegetation by the winter scoop
Caterpillars damage the stems at the soil level and practically eat away the base of the stems of young plants, potato tubers and root crops, leaving characteristic voids in which they sometimes settle. Scoops eat the soft part of the foliage, leaving only veins. It is recommended to pay attention to the general wilting of a large number of plants over vast areas literally within a day.
Agrotechnical methods of control
Compliance with the following requirements will help reduce the number of pests.
- The alternation of crops in the crop rotation, in which the systematic inter-row cultivation of tilled crops contributes to the destruction of a large number of larvae and pupae.
- After harvesting peas and other nitrogen-accumulating crops, early plowing is necessary to destroy summer generations of caterpillars and pupae not only of the winter cutworm, but also other harmful insects.
- Complete destruction with a rare settlement of the site with weeds. With a dense herbage, the winter cutworm butterfly does not lay eggs in these places.
- Compliance with the timing of sowing and planting garden crops. When possible, use early sowing and planting seedlings.
- Planting and sowing garden crops with zoned varieties.
- Roadside cleaning summer cottages from weeds. Replacement of densely growing ornamental cereal crops by sowing.
Biological - Planting plants that attract predatory insects and vectors of fungal and other diseases of winter scoops: black banhus, tahina fly, trichogramma, etc.
- Attracting rooks, starlings, wagtails, flycatchers, titmouses, sparrows and others to garden plantings useful birds. A large number of caterpillars and pupae are destroyed by jackdaws, crows, lapwings.
A good effect is provided by the use of modern biological products developed on the basis of positive effective microorganisms: Fitoverm, Agrovertin, Trichodermin, Aktofit, Gaupsin, Bitoxibacillin and others. They can be used all warm season. They do not harm humans, animals, beneficial insects(bees, bumblebees). The methods of their preparation and the periods of application are clearly described in the recommendations. There is no need to increase the concentration of solutions: this will not bring the expected effect.
Chemical control methods
In a private household, on a plot limited to several acres chemicals better not to use. For the hurried and those who believe only in chemical measures fight can be recommended below the following drugs.
But, remember! chemicals are poisonous to humans, their residues can accumulate in garden crops. The disease comes on gradually and does not appear immediately, like poisoning. Therefore, it is necessary to work with chemicals with extreme caution, observing personal safety measures and in accordance with the recommendations.
In the spring, during the period of the first flight of butterflies (when the temperature is above +12..+15°С), the chemicals Decis, Fury, Karate, Proteus, Fas, Sherpa, Arrivo, Inta-VIR, Strela, Match, Karbofos are used for plant treatments . At summer flight Zolon, Danadim, Fufanon, Dursban are also recommended.
You can use chemical preparations for plant treatments no more than 2 times per season. The last treatment is carried out 30-40 days before harvest. Under crops with a short growing season, chemical preparations are not used. All treatments are carried out strictly in accordance with the recommendations.
- Experienced gardeners advise not to spray vegetable plants with poisons, but to finely chop your favorite scoop weeds (white or common gauze, sow thistle, bindweed), process them (for example, with decis) and spread them around the beds.
Folk methods of struggle
Folk methods of struggle are based on the "habits" of pests.
- They cannot stand the smells of insecticide herbs and decoctions from them.
- They are attracted to the smell of their favorite flowering weeds and cultivated flowering plants.
Scoop butterflies do not tolerate the smell of onions, burdock leaves, potato tops, garlic arrows, wormwood. Prepare the infusion in a ratio of 1:2-3. One part insecticide plants (stuffed tightly liter jar) pour 2-3 parts of boiling water, leave for 2-3 days, dilute to 4-5 liters. Dissolve 25-30 g finely grated laundry soap(for better adhesion), spray plants. Spraying can be repeated after 7-10 days.
- It drives away the butterflies the smell of calendula, cilantro, basil, which can be planted in beds or planted among vegetable crops.
You can use decoctions and infusions of many insecticide herbs. Remember! Not all herbs are acceptable for use, as they can be strong poisons, causing poisoning(Aconite, Datura, etc.).
Back in 1969, the moth was brought to the American continent in industrial purposes for breeding silkworms. But attempts to develop this area failed, and the delivered insect, as a result, became the main pest on greater territory USA and Canada. Every year there are more and more new methods of dealing with this problem. These pests include the scoop, which causes significant harm to gardeners every year.
Scoops - who are they, and what is their harm?
This family contains about 100 species. They are butterflies of various colors - gray, brown, often dark. Scoop butterflies do absolutely no harm to the plant, since they feed exclusively on their nectar. But their offspring - caterpillars - eat everything that comes in their way.
Depending on the feeding method, these insects were divided into two groups:
- Gnawing scoop feeding on underground fruits of plants. Its species includes: potato, exclamation and winter scoop.
- The leaf-eating scoop eats fruits and plants that are on the surface of the earth, and leads a terrestrial lifestyle. This species includes: alfalfa, cabbage and garden scoop.
Both species are active only at night. Both butterflies and larvae hide during the day and are in a stationary phase until dark. Let's take a closer look at each pest separately.
potato scoop
This insect breeds on ordinary non-chernozem soil. This species leads to enormous crop losses of potatoes, onions, rhubarb, sorrel and other plants. I would especially like to note the reproduction of scoops on tomatoes. Its appearance on a plantation with tomatoes is very common, leading to almost 100% yield loss. The butterfly of this species is characterized by large grayish-yellow wings with a red or brown tint. Its caterpillar is bright yellow or red in color with a longitudinal stripe on the back reaches a size of half a centimeter.
Laid eggs of the potato scoop successfully endure wintering, and already in May begin their revival.
The initial food for young caterpillars are leaves and stems of cereals. Already adult insects move to more large plants, damaging the stems and root system in its path. The period of transformation of caterpillars into pupae is carried out at the beginning of summer right in the soil near the affected plants. The adult butterflies that have bred fly out and lay new eggs on the ground until mid-autumn. wild plants, such as timothy grass and wheatgrass. Eggs can also be laid on potato and rhubarb leaves. This species reproduces only one generation.
How to destroy
Methods for combating this pest are the destruction of all plant residues after harvest, as well as the disposal of all weeds belonging to cereal varieties. Such measures are often used to destroy many other pests.
exclamation owl
The exclamatory scoop reproduces very successfully and is distributed almost everywhere. This species affects the root crop of the crop. The insect got its name due to the presence of color in the form of an exclamation mark on the surface of the wings. The caterpillar has a gray-brown color with a yellowish tint and reaches a size of half a centimeter. Mature caterpillars tolerate cold well and hibernate in the soil at a depth of about 30 cm, where the pupation process takes place in the spring.
Eggs are laid in small groups on the leaves of weeds, sometimes just on the ground. The viability of the caterpillars comes in a week.
At first they lead an open lifestyle, and then hide, but after dark they crawl out for reinforcements. Young insects gnaw out succulent green leaves plants to the very veins, then bite into roots, roots, eat embryos and seedlings directly in the soil. Behind summer period only one generation of this pest manages to reproduce.
The methods of dealing with the exclamation scoop are as follows:
- Careful destruction of all weeds that serve as food for young caterpillars;
- Treatment of cultures with a solution of lepidocide. It is necessary to dilute 2-3 grams of the substance in 1 liter of water.
cabbage scoop
Another harmful insect, common almost everywhere, is the cabbage scoop. Her favorite crops are cabbage, peas, beets, lettuce and onions. This is a butterfly with brown wings with a kidney-shaped gray spot on the surface. Initially, its caterpillar has a juicy green color, then it changes to a brownish-brown hue with dashes on the back.
The pupae of the cabbage scoop, like other species, hibernate in the soil, burrow to a depth of no more than 4 cm. At the beginning of summer, butterflies fly out and lay their eggs on the inside of the leaves of plants growing in areas with high moisture. The mass appearance of caterpillars falls on July-August. Wet and cold environments are favorable conditions for their reproduction. They penetrate into the head of cabbage and eat through the root crop from the inside. Eaten leaves to holes are a sign of the appearance of this pest. The cabbage scoop is especially dangerous because it can breed in several generations over the entire summer period.
How to destroy?
But fortunately, there are methods to combat this insect:
- In order to avoid damage to the crop by a scoop, early planting of seedlings is recommended.
- As an option - manually collecting caterpillars and eggs of the pest.
- Implementation foliar feeding plants with potassium chloride and superphosphate.
- Very effective method spraying cabbage with insecticidal infusions based on burdock, wormwood, potato tops.
- Not a single application of lepidocide, phytoverm 5 days before the harvest.
- Spraying is also effective, according to the instructions of Zeta, Inta-vir, Fas.
All these measures are really very good. But, nevertheless, experts are developing new ways to deal with this harmful insect, since every year the scoop adapts to existing drugs.
pith scoop
One of the most popular pests that affect both root crops and plants that produce fruits on the surface is the common heartworm. Potatoes, tomatoes, rhubarb and about three dozen more plants that are affected by this type of pest. The butterfly has a bright and two-tone color of the wings of rusty yellow and brown-violet hues. Her caterpillar is different big size, reaching up to 0.5 cm, and has a yellow, sometimes off-white color.
Eggs successfully endure winter at the bases of plants, as well as at elderberry bushes. Especially dangerous are young caterpillars in the active phase. They penetrate the stems and gnaw them from the inside. Such plants no longer have a chance to recover, they break down and simply dry out. At the beginning of summer, mature caterpillars descend along the passages made in the stems and gnaw holes for the butterflies to fly out, after which they successfully pupate. One plant can be affected simultaneously by several caterpillars.
The methods of dealing with this scoop are the same as for the destruction of the potato scoop.
garden scoop
The most dangerous for almost all cultivated crops is the garden scoop. It is distributed almost throughout the territory of the countries of the former Soviet Union. The list of plants affected by it includes about 40 crops. But most of all she prefers turnips, tomatoes, cabbage and radishes. The butterfly has bicolor wings of brown and red hues with two spots of yellow and gray on the surface. Caterpillars are both green and brown.
The garden scoop can give two generations in the southern regions and one in the northern ones. Corn, millet, sugar beets are the first crops that begin to infect young caterpillars. Then they move to cereal and melon plants.
Successfully enduring wintering at a depth of up to 25 cm, the caterpillars rise to the surface and, with the onset of heat, pupate. In mid-June, butterflies appear, the life span of which lasts until August. The laying of eggs by females is carried out on the inside of the leaves on absolutely all nearby plants. The caterpillars that have appeared gnaw through the leaves of plants, and also infect unripe tomato fruits.
How to destroy?
Use different methods to combat this pest: 
- Catching butterflies for bait.
- Collecting caterpillars during the harvest.
Destruction of all weeds, especially deaf nettle, quinoa, white mari, on which the scoop especially likes to lay its eggs.
Spraying with compounds used to destroy cabbage scoops.
All these measures to combat the armyworm are very effective, the main thing is that they must be carried out in a timely manner and according to the instructions. Then the plants will be healthy and give you a wonderful harvest.
Scotia (Agrotis) segetum Schiff., Lepidoptera order, Noctuidae family (Fig. 4).
The winter cutworm hibernates in the caterpillar stage more often than older instars (V and VI) in the soil at a depth of 10–25 cm, sometimes deeper. Caterpillars of the last sixth instar can withstand temperatures down to –11 0 C. The success of wintering depends on the development of the fat body. Caterpillars of younger ages die at temperatures below -5 0 C. In spring, with the onset of heat, caterpillars of the winter cutworm rise to the upper layers of the soil, where they pupate in an oval earthen chamber at a depth of 5–6 cm.
Rice. 4. Winter scoop: 1 - butterfly; 2 eggs; 3 - caterpillar damaging winter crops; 4 - pupa in the soil.
The development of the pupa lasts 2-3 weeks. The beginning of the flight of butterflies and its duration is determined weather conditions and is usually observed in mid-June. Butterflies are active at dusk and at night, during the day they hide under the leaves of weeds, in other shelters. To reach puberty, female cutworms need additional nutrition with flower nectar. Under optimal hydrothermal conditions and abundant feeding of caterpillars and additional feeding of butterflies of the winter cutworm, fertility can reach up to 2200 eggs. Poor nutrition of caterpillars and butterflies causes a decrease in fertility and even infertility. Butterflies of the winter cutworm most often accumulate on well-heated fields with a sparse herbage: on fallows and tilled crops. The female lays her eggs on the underside of the leaves of young weeds, on plant debris, and even on the soil. Embryonic development lasts 12–24 days. The duration of development of caterpillars depends on nutrition and climatic conditions, this period can be from 36–45 days with optimal temperature and up to 90 days under adverse conditions. The optimal temperature for the development of caterpillars is +18…+25 0 С and relative air humidity – 70–100%.
Caterpillars of the winter scoop are polyphagous and feed on plants belonging to various botanical families. During the day, the caterpillars are in the soil, and at night they crawl out to the surface to feed. Greater damage is done to beets, potatoes, vegetables, shoots of winter crops. In the conditions of Belarus, 1 generation develops.
EPV: beet - 2–3 caterpillars/m2; winter cereals - 5–8 caterpillars / m 2.
The owl caterpillar is fruit pest and a threat to future crops by eating leaves and buds on trees and shrubs. She is so tenacious that she is able to survive even in the tropics and the Arctic desert. Only effective measures fighting the armyworm at all stages of its development will help protect horticultural crops from defeat.
Description of butterflies and caterpillars
Scoops are flying insects that look like a gray moth. Most great harm for plants, its caterpillars bring, which are so gluttonous and insatiable that in a few days they are able to deprive a tree or shrub of all green parts. They live in the soil, and find food for themselves by climbing the trunk and branches of horticultural crops.
In total, a large number of such butterflies are distributed in the world, the main ones are: cabbage, garden, pea, gamma, winter, exclamation and gnawing.
Scoop caterpillars can reach a length of 4-5 cm. The average from egg to adult is 1 month. The larvae hatch after 4-10 days from the eggs laid by the female. During its existence for 14-20 days, the caterpillar actively feeds and grows, experiencing 5-6 age generations and molting 3-5 times. After that, it turns into a chrysalis, which develops underground for another 14-16 days. Only then do scoop butterflies appear, whose life is not very long and is up to 25 days.
Interesting!
The scoops got their name for their external resemblance to the birds of prey of the same name, which manifests itself in the form of a collar of thick hairs above the head, as well as a nocturnal lifestyle and wing colors. According to these features, they differ from.
As you can see in the photo, the scoop caterpillars have a thick, hairless body and a characteristic stripe pattern: one light longitudinal one runs along the back, dark, thinner ones on the sides. Its color depends on the species: gray, green, yellow, brown, with pink or purple hues.
Harm from scoops
Scoop butterfly larvae are caterpillars, garden and garden pests that eat different kinds plants, almost all that are found on their way. Scoop caterpillars belong to the group of polyphages.
Scoop caterpillars are divided into 3 groups:
- leaf-eating - feed on the green mass of plants (young stems, leaves, buds and inflorescences), attack trees and shrubs;
- gnawing scoops - the so-called gray caterpillars that cut the plant near the roots, live in the soil and eat garden crops;
- intrastem - live in thicker stems, gnawing them from the inside, which leads to the death of the plant.
Interesting!
To destroy a dozen plants in one night, it will take the efforts of 3-8 caterpillars of several types of such pests. Damage to the crop, which scoops can cause, is estimated at 100%. The older caterpillars of 5-6 generations destroy plantings as much as possible. There are also granary varieties that feed on grain in storage: common and grain cutworms.
Gnawing species that attack garden plants include:
- Winter scoop, whose caterpillars hibernate in the soil at a depth of up to 30 cm, and in spring move closer to the surface and plants. Every night they crawl up and devour leaves and young rosettes. They grow up to 5 cm in length, have a gray-earthy color with a greasy sheen, a light line on the back. Young gray caterpillars live in the ground in June-July and eat seedlings of beets, corn, sunflowers and other crops, in August they damage vegetables ripening in the beds, in autumn they can eat sown winter cereals and their seedlings.
- Exclamation Scoop: its caterpillars are dark gray in color, body length up to 3 cm. vegetable crops: cabbage, carrot, potato, etc.
- Garden - develops in 2 generations: young caterpillars about 3 cm long have a color of various green shades (from light to dark brown). They are polyphagous, attack plantings of cabbage, beans, peppers, tomatoes, including in greenhouses. The adult generation of green and black caterpillars in the ground prefers not only leaves, but also the pulp of fruits, gnawing holes in them.
- The caterpillar of the cabbage armyworm emerges from eggs laid by the female in May-June and from July to September on the undersides of the leaves of horticultural crops. They prefer cabbage, lettuce, beets and peas. Color of larvae: gray-green or yellow-brown, rarely black. Damaged cabbages spoil quickly and can spread phytopathogenic infections. ineffective, and chemicals are dangerous to humans.
Among leaf-eating scoop species, the most common is the yellow-brown moth scoop, which has yellowish-gray wings with spots and lines, framed by a light fringe. Its caterpillars differ from others by yellow dots and 5 longitudinal light lines along the back. Females lay their eggs on the buds and leaves of trees and shrubs from May to June, after a few days voracious larvae appear from them.
Caterpillar fight
Methods of dealing with caterpillar scoops are divided into folk and chemical.
The first ones include:
- Manual collection of earthen caterpillars, which is best done in dark time days, armed with a flashlight. At such hours, they crawl out onto the leaves of plants, where they are easy to detect, in order to then throw them into a bucket of soapy water for destruction.
- Place a plastic or cardboard fence up to 10 cm high around garden crops, which will prevent the larvae from reaching their roots.
- Sprinkle cornmeal in the habitats of the caterpillars, after eating which they will die from its negative effect on digestion.
- In greenhouses, butterflies can be controlled using pheromone and light traps.
The use of biological preparations and methods of combating caterpillars:
- Lepidocide is a concentrated bioinsecticide, diluted 40-50 g per bucket of water.
- Bitobaxicillin - a solution is prepared at the rate of 50 g of the product per 10 liters of water.
- Bacterial preparations containing Bacillus thuringiensis are effectively used against young caterpillars. The bugs that have emerged from the spores destroy the eggs, sucking out their contents, and then the young larvae that have appeared.
- Used to destroy caterpillars and special means containing Podisus maculiventris and Picromerus bidens L.
On a note!
If the caterpillars continue to multiply, then the plants should be re-treated. Spraying with biological products is carried out at a temperature of more than + 18 ° C in dry weather in the absence of dew, the optimal period is from 18 to 20.00 in the evening.
Chemicals
There are methods and techniques, scoops, which have already bred heavily on plants in the garden or in the garden. To do this, use chemicals containing deltamethrin: Biorin and Super Fas, which will quickly and effectively get rid of pests. However, treatment should be carried out every 3-7 days, taking into account different time emergence of larvae from eggs.
Another group is preparations of the neonicotinoids group: Aktara, Komfidor, which are designed to combat leaf-eating insects and larvae. They have a systemic long-term effect, poisoning pests through the green parts of plants and fruits.
Caterpillar Prevention
In order to reduce damage from the appearance of scoop butterfly larvae, experts recommend using folk remedies and other methods of prevention:
- regularly destroy weeds, especially flowering ones, in the aisles and along the border of the plot, on which butterflies land for food;
- during periods of reproduction and the creation of egg laying, females should more often deeply loosen the soil in the aisles of the garden;
- during the mass summer of butterflies, traps are set from containers with water, to which beer or jam is added, which attracts the smell of pests;
- spray vegetable plantings infusion of flowering wormwood, which is prepared at the rate of 300 g of raw materials, 1 tbsp. ash and 1 tbsp liquid soap for 10 liters of boiling water, then cover with a lid and leave for 5-6 hours, after cooling, immediately spray;
- after harvesting vegetables, be sure to do deep digging in the fall to collect and destroy scoop pupae;
- for prevention purposes, it is recommended to treat plants annually before flowering complex preparations: Fufanon, Kinmiks, Aktellik, Iskra, Inta-Vir, Kemifos, etc.
The fight against caterpillars and scoop butterflies continues almost the entire season using various methods and funds. Only constant thorough inspection and maintenance of garden and horticultural crops will allow timely taking all necessary measures for the destruction of such pests.
