Common Diseases and insect pests in planting Cucumber and their Control methods

Cucumber is widely cultivated in various parts of China, and is now widely planted in temperate and tropical regions. It is one of the main greenhouse products and is a common vegetable on the dining table. In the process of cucumber planting, most of the diseases and insect pests are mixed. When preventing and controlling diseases, we must pay attention to the compound of pesticides and the flexible use of drugs in different periods of disease. Let's take a look at cucumber pest control techniques.

Cucumber disease control

Cucumber diseases are mainly caused by cucumber downy mildew, cucumber powdery mildew, cucumber anthracnose and cucumber gray mildew. The main causes of cucumber diseases are caused by the warm weather, the gradual rise of air temperature and improper management. The prevention and control techniques of cucumber diseases are introduced as follows:

1. Downy mildew

[hazard characteristics] under the condition of low-lying terrain, poor ventilation and excessive watering, downy mildew is more serious, mainly harmful to leaves and occasionally to stems and pedicels. At the initial stage of the disease, there are water-stained polygonal disease spots, which are not perforated, and black mildew layers may grow on the back of the disease spots when the humidity is high. In severe cases, due to the large number of disease spots, rapid expansion and mutual healing of disease spots, the leaves scorch and die early.

[prevention and control methods] Ecological prevention and control: maintain good indoor ventilation and control the indoor temperature at about 25 degrees during the day and 15 degrees at night. Drug control: spray 2000 times of water with 50% bacteria during the onset of the disease, and spray again in 3-5 days with serious illness.

2. Powdery mildew

[hazard characteristics] powdery mildew damaged all parts of the plant, but mainly leaves and vines. At the initial stage, small white powder spots appeared on both sides of the leaves, and then expanded into a large area of powdery powder with inconspicuous edges. In severe cases, the whole leaf was covered with white powder, and in the later stage of the disease, the white mildew spot turned gray due to the maturity of the hyphae, and the diseased leaves were yellow and withered with small black spots.

[control methods] Field management: select disease-resistant varieties as far as possible, pay attention to light transmission, reasonable irrigation, reduce air humidity and apply sufficient organic fertilizer. Drug control: at the initial stage of the disease, Tian Nuo granule Feng germicidal type was sprayed with 1000 times of water, once every 5-7 days, repeated 2-3 times.

3. Grey mold

[hazard characteristics] Botrytis cinerea not only harms cucumbers, but also damages green peppers, eggplant and kidney beans. Botrytis cinerea mainly harms leaves, fruits and flowers of cucumbers. Botrytis cinerea invades from aborted female flowers and grows grayish brown mildew layer, then invades young melons, causing top rot, softening and atrophy, and the damaged parts of big melons first turn yellow until they rot and fall off.

[control methods] Field management: high cultivation, reducing field humidity, reasonable irrigation, watering in the evening, proper ventilation and moisture drainage to promote its healthy growth. Chemical control: at the initial stage of the disease, use 50% Sukeling wettable powder 1500-2000 or 50% carbendazim 800-1000 times liquid spray.

4. Anthrax

[hazard characteristics] anthracnose mainly harms stems, leaves and so on. Water-immersed spots appeared at the beginning, and the injured spots on the leaves were nearly round, reddish brown, with halos on the outside, and ruptured in the middle of the lesions when they were dry. The black-brown disease spot occurs when the fruit is damaged, which is easy to bend and deform.

[control methods] soil treatment: rotation with non-melon crops for more than 3 years. Soil disinfection, selection of disease-resistant varieties, crop rotation, removal of diseased and residual plants, and application of phosphorus and potassium fertilizer. Chemical control: spray 1% mancozeb 100 Bordeaux solution, or 65% mancozeb 500-800 times, 80% anthrax Fumi wettable powder 800 times, 70% mancozeb wettable powder 400 times, or fumigate with 45% chlorothalonil fumigant 250 grams per mu. Use once every 7-10 days, 3-4 times in a row.

Cucumber pest control

The main pests of cucumber are leaf miner, whitefly, melon aphid and so on. Field management should be strengthened in the process of control.

1. Leaf miner

[hazard characteristics] after hatching, the larvae latent feed on the mesophyll, showing zigzag food marks. At the seedling stage, the 2-7 leaves suffered more, and the serious latent scars were covered, resulting in yellowing, scorching or shedding of the leaves. The terminal of the insect track does not widen obviously, which is different from Liriomyza huidobrensis, Liriomyza huidobrensis and Liriomyza huidobrensis.

[biological control] release Ji wasp, anti-jaw cocoon wasp, Liriomyza sinensis cocoon wasp and so on, these three parasitic wasps have a high parasitism rate to Liriomyza huidobrensis. The application of insect growth regulators can affect adult reproduction, egg hatching, larval peeling, pupation and so on.

[chemical control]

① 5% Regent suspension, 50% 100 ml / mu, 40% Qixingbao EC 600 × 800 times, control time is in the peak period, 5-7 days once, continuous control 2-3 times.

② insect growth regulator 5% Yitaibao 2000 times solution, 5% carrageenol EC 2000 times solution, has infertile effect on adults of Liriomyidae, and the hatching rate of adults is low.

③ was sprayed with 50% phoxim EC 1000 times in the peak period, once every 5-7 days for 2-3 times in a row, and stopped using the drug 7 days before harvest.

2. Whitefly

[hazard characteristics] secrete a large amount of honey, seriously polluting leaves and fruits. Leaf symptoms: adults and larvae congregate and secrete a large amount of honey, seriously polluting leaves and fruits, and causing coal fouling disease.

[biological control]

① cultivation of "insect-free seedlings": fumigation greenhouse before breeding to remove the residual insect population, remove weeds residual plants, in the greenhouse ventilation with a layer of nylon yarn to avoid exotic insect sources.

② try to avoid mixed planting: in particular, cucumbers, tomatoes and beans should not be mixed. Adjusting the production stubble is also an effective method, that is, the first stubble arranges vegetables with light damage caused by whitefly, such as celery and sweet pepper, and then grows cucumbers and tomatoes in the second crop.

③ removed the old leaves and burned: the old nymphs were mostly distributed in the lower leaves, and some of the old leaves were properly removed during eggplant fruit pruning, buried or burned to reduce the population.

④ aphid wasp: aphid wasp can successfully control whitefly in greenhouse. When the adult of whitefly is less than 0.5 per plant, 15 adults of APHIS gossypii were released every two weeks.

⑤ yellow has a strong trapping effect on adults of whitefly: setting yellow board (1mX0.7m fibreboard or cardboard) in greenhouse and painting it with orange peel yellow and then smearing a layer of sticky oil with 34 pieces per mu has a significant effect on trapping and killing adults. The yellow board is set between the rows and is equal to the height of the plant. Viscous oil is generally adjusted with No. 10 engine oil and a little butter, and reapplied once every 7 to 10 days. Pay attention to prevent oil droplets from causing burns on the crops.

[chemical control]

① uses a knapsack motor smoker or 3MF-3 knapsack plant protection multi-purpose machine to atomize 1% deltamethrin or 2.5% fenvalerate (fenvalerate) oil into droplets of 0.5 ~ 5 μ m, which are suspended in the air to kill adults.

② was sprayed twice with 25% buprofezin (buprofezin) wettable powder 100ppm and 200ppm when the average number of adults was 2.7and 6.6, and mixed with permethrin 100ppm and bifenthrin (Uranus) 5ppm twice when the adult was 19.5.

③ 2.5% deltamethrin or 20% fenvalerate EC 2000 times spray once every 6-7 days for 3 consecutive times.

④ methyl acaricidal (acaricidal) wettable powder 1500 times solution, bifenthrin 0.8~2g/ mu, the control effect on adults was more than 99.% one day after treatment.

3. Melon aphid

[hazard characteristics] leaves curled, melon seedlings wilted, and even withered. The old leaves were damaged and withered ahead of time, which shortened the fruiting period and reduced the yield.

[biological control]

Non-insect strong seedlings were cultivated by ①. Strictly use the anti-insect net from the seedling period and cultivate insect-free seedlings.

② uses yellow board to trap aphids. Taking advantage of aphids' tendency to yellow, yellow board was used to trap aphids.

③ protects predators. Such as small black spider, star leopard spider, spider, seven-star ladybug, tortoise ladybug, black ladybird, Chinese lacewing, aphid fly, Huaji assassin bug, tiny bug, aphid cocoon wasp, lacewing, lacewing, gall mosquito, aphid mold and so on.

[chemical control]

When ① finds that there are aphids, you can use 0.65% anistemisin 100ml, add water 30-40kg and spray, or Shaoguan mycin 200x liquid, add 0.01% washing powder, or 2.5% fish rattan essential EC 600ml800 times, or spray with tobacco water (tobacco water = 1:30-1:40).

② 20% Suele oil slick 1000 times, or 40% chrysanthemum and horse EC 2000 times. Or 21% cyhalothrin (killing) EC 4000 times, or 2.5% cyhalothrin (kung fu) EC 3000 times, or 2.5% bifenthrin EC 3000 times, or 10% imidacloprid wettable powder 2000 times, spray again every 10 to 15 days.

If you want to strictly control the above various pests, you should set up a qualified pest control net, timely detection and control, and eliminate the insects in the spot film occurrence stage. The preferred method is physical and biological control, and the necessary chemical control can be selected in the major occurrence period.

Common diseases and insect pests of cucumber and their control methods

Cucumber is a common fruit and vegetable vegetable, which is rich in vitamins and is deeply loved by people. In the process of cucumber growth, there will be many diseases and insect pests. The following editor briefly introduces the prevention and control methods of common cucumber diseases and insect pests.

(1) Cucumber downy mildew

1. Symptom

The disease can occur in the whole growth period of cucumber, which mainly harms the leaves. At the beginning of the disease, small water-immersed light yellow spots appeared on the back of the leaves. With the development of the disease, the disease spots gradually expanded, and polygonal yellow spots were formed due to the limitation of leaf veins. When the disease was serious, the small disease spots converged into large disease spots, and a gray-black mildew layer grew behind the disease spots under wet conditions. The diseased leaves developed from the bottom up, and the leaves of the whole plant withered and died in severe cases.

two。 Prevention and cure method

Increase the application of phosphorus and potassium fertilizer to improve the disease resistance of the plant. After melon bearing, the root of the lower old yellow leaf was promptly removed and sprayed with 0.2% potassium dihydrogen phosphate or a mixture of urea and sugar sprayed with 1% urea and 100% urea, so as to increase the total sugar content of functional leaves and improve the physiological disease resistance of leaves. For drug control, the following agents can be selected at the initial stage of the disease: (1) 25% Ruidui wettable powder 800m / m / m / m. (2) 500-600 times the liquid of 90% bengshuangling wettable powder. (3) 75% chlorothalonil wettable powder 500-600 times. (4) 5% chlorothalonil or 5% carbendazim dust, 1 kg per mu, once every 7-10 days, 3-5 times in a row.

(2) Cucumber powdery mildew

1. Symptom

The disease mainly harms leaves. In the early stage of the disease, white round powdery spots appeared on the back and surface of the leaves, which became a piece after expansion, grew into a layer of white powdery matter, and gradually became grayish white, and the leaves withered and died after yellowing.

two。 Prevention and cure method

Fumigation and disinfection in protected areas. Disinfect with sulfur powder or chlorothalonil smoke scavenger before planting. The method of fumigation with sulfur powder is 0.13 kg of sulfur powder and 0.25 kg of sawdust every 55 cubic meters. Such as using chlorothalonil smoke remover 250 grams per mu, put several places lit in the evening and sealed overnight, open the doors and windows the next morning for ventilation. You can choose 40% Fuxing EC 8000 murine powder * times solution, or 25% rutin wettable powder solution 1500 times, or agricultural antibiotic 120 biological preparation 100PPM, or 50% carbendazim wettable powder liquid spray, alternate use, no 7-10 days once, continuous prevention and treatment for 2-3 times.

(3) Cucumber bacterial angular spot

1. Technical symptoms of cucumber planting

The disease mainly harms leaves, but sometimes also harms stems and melons. The cotyledons were damaged, initially watery, round or oval sunken spots, producing needle-sized watery spots, then turning pale brown, triangular due to the limitation of leaf veins, white bacterial pus on the back of the leaves when the humidity was high, and a layer of white transparent film after drying. After that, it turned into a yellowish-brown spot and dried up. The plaque is brittle and easy to crack and perforate in the later stage. The disease spot on the stem and fruit is watery, nearly round, and then becomes light gray. Cracks often occur in the middle of the disease spot, and young melons often rot and fall early after being killed.

two。 Prevention and cure method

Seed disinfection, soak the seeds with 55 ℃ warm water for 15 minutes, or soak the seeds with 50% sulfamide 500x solution for 1 hour, or soak the seeds with 40% formaldehyde 150x solution for 105h, rinse with clean water and accelerate germination. In the early stage of the disease, spray 50% T800-fold solution, or 70% can kill 400-fold solution of wettable powder, 500-fold solution of neostigmycin, or use 100-400-fold Bordeaux solution, or 80% Ludebao wettable powder 500-fold solution, once every 7-10 days, for 3-4 times in a row.

Cucumber planting technology, detailed use of Saleford fertilizer in the cucumber planting process, you can see the relevant use instructions, generally increase production of more than 25%, but also can effectively prevent the occurrence of various pests, is the preferred fertilizer for pollution-free organic agriculture in the greenhouse.

Common diseases and insect pests in planting eggplant and their control techniques

Eggplant was first produced in India and was introduced into China in the 4th-5th century AD. The cultivated area of eggplant in China is about 3 million mu. The main diseases are eggplant cotton blight, eggplant brown stripe, sudden fall, blight and so on. The main pests are red spiders and Liriomyza huidobrensis. Let's take a look at eggplant pest control techniques.

Eggplant cotton blight

[damage symptoms] eggplant cotton blight is also known as "rotten eggplant", "egg drop" and so on. In addition to harm eggplant, but also harm tomatoes, cucumbers, potatoes and so on. On eggplant, it is mainly harmful to fruits, stems and leaves, and flower organs can also be damaged. The fruit initially appeared waterlogged round or oval brown spots, rapidly expanded and sunken, often the whole fruit rotted, white loose mildew when wet, the internal pulp became black and rotten, easy to detach from the calyx. Water-immersed dark brown spots were produced on the twigs, which overflowed and withered and withered, while the seedlings were susceptible to the disease.

[disease condition] the pathogen overwintered mainly on the diseased remains in the soil, and in the second year it could directly infect the stem or root of the seedling, or splashed on the fruit near the ground by Rain Water to cause fruit disease. The spores on the disease spot are re-infected by wind, rain and watering. General 7-August, continuous rain, muggy weather, low-lying nest wind, poor drainage, weak growth when the disease is serious.

[control methods] resistant varieties were selected for ①, such as Beijing nine-leaf eggplant, six-leaf eggplant, Tianjin Dawei, Liaoqie 3, Fengyan 1, Jinan Zaoxiaochang eggplant and so on. ② agricultural control: avoid continuous cropping with Solanaceae crops. Select sandy loam with high dryness and good drainage, high border or small high ridge planting or wide ridge close planting, apply sufficient base fertilizer, remove diseased old leaves in time and concentrate treatment, can not be used to compost fertilizer, harvest and clean up the diseased fruit in time after rain. ③ chemical control: spray once before the onset of the disease or before the onset of the rainy season. After the disease, remove the diseased fruit and leaves, spray once in about 7 days, 2-3 times in a row. The medicament has 1 ∶ 1 ∶ 160Bordeaux solution, 50% methyl topiramate 1000 times solution, 50% carbendan 500 times solution. At the peak of the disease, 72% of DuPont Kelu wettable powder, 58% metalaxyl manganese zinc wettable powder and 64% poisonous alum wettable powder were sprayed.

Brown streak of eggplant (also known as dry rot)

[damage symptoms] when the seedlings were injured, similar fusiform waterlogged spots were formed at the base of the stem near the ground, and then turned dark brown, sunken and contracted. When the conditions are suitable, the disease spot expands around the stem and the seedlings are quenched. Leaf damage, first from the bottom of the leaf disease, gradually developed to the upper, began to produce watery brown, gray or light brown in the middle, many small black spots in the central whorl. The disease spot is easy to crack when dry, and perforation is easy to be formed in cloudy and rainy days. Stem damage, disease spot is uncertain, sometimes water-stained fusiform disease spot, dark brown edge, gray-white in the middle, many small black spots, disease spot gradually sunken dry rot, and connected into a longer necrotic area. The fruit suffered the most seriously, at the beginning of the disease, there were yellowish-brown spots on the fruit surface, slightly sunken, round or oval, expanding rapidly, the fruit was semi-soft rotten, and in the later stage, there were many small black spots, and finally the diseased fruit rotted off or dried on the branches.

[disease condition] eggplant brown streak is a fungal disease, which only infects eggplant. The pathogen overwinters on the remains of the soil surface disease, and it can also winter on the seeds. Seed-borne bacteria is not only the main cause of seedling quenching and blight, but also the way of long-distance transmission of pathogens. The field spread mainly by Rain Water, insects and field operations. The suitable temperature for the disease is 28-30 ℃, and the relative humidity is more than 85%. The disease is serious in North China from July to August with high temperature and rainy, or high temperature and high humidity. It is also easy to cause disease when the cultivation density is too high. In addition, continuous cropping, poor drainage, heavy soil, too much nitrogen fertilizer and early spring eggplant planting too late, the disease is also serious.

[control methods] ① seed treatment: soak the seeds with 40% formalin 100x solution for 15 minutes, remove them and rinse them with clean water, or soak the seeds with 1000 times mercury solution for 10 minutes. ② agricultural control: rotation with other vegetables for 2-3 years. Carry on the seedbed disinfection, the five generation mixture is 8-10 grams per square meter, or 50% carbendazim is 10 grams, add fine soil 20 grams to mix well, before sowing, sprinkle on the border surface, after sowing, cover with 2 gamma 3 herbal soil. Strengthen cultivation management, that is, N, P, K fertilizers should be used together, sufficient base fertilizer should be applied, diseased plants and leaves should be found, and diseased fruits should be removed in time. ③ medicament control: at the initial stage of the disease, 75% chlorothalonil wettable powder, 50% methyl topiramate, 65% mancozeb and 70% mancozeb were used. Spray every 7-10 days for 2-3 times.

Cataplexy

[damage symptoms] sudden collapse, also known as neck jam, is mainly infected at the seedling stage. Seeds can occur after germination and before they are unearthed. The disease is rotten seed or bud before it is unearthed. After being unearthed to 2 true leaves, it mainly occurs at the base of the stem. The base of the stem near the ground of the diseased seedling showed water-stained spots, then yellowed and constricted into a linear shape, and when the cotyledons did not wilt, the seedlings fell on the ground, that is, when the seedlings fell, the leaves were still bright green, so it was called quenching disease. When the environment is wet, a layer of white woolly hyphae grows on the diseased seedlings and the nearby soil.

[disease conditions] the pathogen overwintered in the soil with the remains of the diseased plant, or saprophytic in humus. Bacteria can survive in the soil for 2-3 years, and there are more bacteria in the soil with high content of organic matter. Germs are spread by Rain Water or the flow of water in the soil. When the temperature is 15-20 ℃, the reproduction is faster. Therefore, when raising seedlings in spring or winter, encounter rainy or snowy weather, or the greenhouse has poor heat preservation, poor ventilation, too much watering, often low seedling bed temperature, high humidity, and serious sudden collapse disease.

[control methods] selection of disease-resistant varieties for ①: according to local consumption habits and temperature conditions, low-temperature-tolerant or early-maturing varieties were selected, such as Jinan Xiaochang eggplant, 94-1 early-long eggplant low temperature-tolerant varieties, Liaoqie 1, Liaoqie 4 cold-tolerant varieties, etc. ② soil disinfection: 2-3 weeks before sowing, mix 5 grams of methyl topiramate and 50 times fine soil per square meter and sprinkle them in the seedbed, or mix 7-8 grams of 65% Dysen zinc and 40% pentachloronitrobenzene powder, or 50% carbendazim 8-10 grams plus 15 kg fine soil to make medicine soil, pour through the bottom water before sowing, after the water seeps, sprinkle 1X on the bed surface. Then cover the remaining 2 thumb and 3 medicinal soil on the seed, about 1 cm thick, so that the seed is sandwiched between the medicinal soil. ③ agricultural prevention and control: the seedbed should choose fertile land with high dry terrain and good drainage. In the greenhouse, the garden soil that has not grown eggplant fruit vegetables for many years should be selected as bed soil. Strengthen the ventilation and humidity of the seedling raising place before sowing, and the bed soil should be fully exposed to the sun. Watering as little as possible after emergence, in order to improve the ground temperature, and timely ventilation and light transmission. The greenhouse was covered with no dripping film to improve the light conditions in order to facilitate photosynthesis and improve the disease resistance of seedlings. It can also spray 800 times Lvfeng 95 plant growth regulator to enhance the resistance of seedlings.

[chemical control] after the disease of the seedlings, the leaves were sprayed with 75% chlorothalonil wettable powder, 64% chlorothalonil M8 wettable powder, 1000 times dimethazone solution, or 500x thiram solution, or 800x carbendazim solution. When the disease occurs, the root is irrigated with potassium permanganate solution of 800-1000 times, and then the leaf surface is cleaned.

Blight disease

[damage symptoms] Rhizoctonia solani mostly occurred in the middle and later stage of seedling rearing. After the seedlings were infected, the oval brown disease spot appeared at the base of the stem, then it became thinner and constricted, and the stem and leaves wilted and died. The aboveground part wilted during the day, recovered at night, and withered after repeated several times. There are wheel lines or brown mildew in the disease. When large seedlings or adult plants are damaged, the base of the stem is ulcerated, and the aboveground parts turn yellow and wilt, resulting in death.

[incidence conditions] Rhizoctonia solani is a fungal disease, which overwinters on soil residues or humus and is transmitted by Rain Water, running water, soil and fertilizer. The suitable temperature for the development of the pathogen is 17-18 ℃, and high humidity is beneficial to the disease. The seedling bed is warm and humid, the ventilation is poor, and the seedlings are easy to grow.

The control method is similar to the control method of sudden drop disease, and the key point is to strengthen the management of seedling bed, combined with chemical control. ① strengthens nursery bed management: the method is the same as cataplexy. ② soil disinfection: using Wudai mixture to disinfect soil can prevent not only blight disease but also quenching disease. The method is the same as quenching disease. ③ chemical control: spray 75% chlorothalonil wettable powder, 64% disinfectant alum, or 70% mancozeb wettable powder every 7-10 days, 2-3 times in succession.

Red spider

[damage symptoms] often gathered on the back of the leaves to prick and suck juice with stabbing mouthparts, the damaged leaves began to show small white spots, turned green into yellow and white, and in severe cases, the leaves of the whole plant dried up and turned red like fire, and the leaves fell off. When the fruit is damaged, the pericarp becomes thicker and affects the quality.

[occurrence regularity] 10-20 generations a year, overwintering with adults lurking in weeds and soil cracks. The following spring, first breed in weeds or overwintering places, and then transfer to eggplant or other vegetables. It begins to invade the lower old leaves, and then spreads upward. North China suffered heavy damage from the end of May to the beginning of July. High temperatures and droughts tend to occur in large numbers.

[control methods] ① cleaning fields: clean up the weeds, dead branches and fallen leaves around the eggplant plot, clean up the residual branches and leaves after pulling seedlings, so as to reduce the source of insects. ② chemical control: at the beginning of the occurrence, use 1000 times of 20% dicofol, 1000-1500 times of 25% manganese wettable powder, 1500-2000 times of 1500-2000 times of ciprofen wettable powder or 78% of paracetamol EC 2000 times, spray once every 7 days, spray 2-3 times continuously, focus on the back of leaves, and can be used alternately.

Liriomyza huidobrensis

[damage symptoms] both adults and larvae can be harmful, and larvae are the main damage leaves. The adults prick and suck the juice, and the larvae sneak into the leaves to produce irregular serpentine white insect channels, which affect photosynthesis and fall off when the leaves are serious.

[occurrence regularity] Liriomyza huidobrensis propagates quickly and has a short generation interval. It generally breeds one generation in 15-30 days in summer and one generation in 40-60 days in winter. It can happen annually in the sanctuary. After the larvae lived in the leaves for 4-7 days, the old larvae bit through the epidermis outside the leaves or pupated on the soil surface.

[control methods] Agricultural control of ①: strict quarantine to prevent the insect from spreading, rotation, intercropping and intercropping with vegetables of other families. Remove damaged old leaves and withered yellow leaves in time and destroy them centrally. Centralized elimination at the initial stage of occurrence. When a small number of leaves are found to be damaged in the field, the larvae can be pinched to death one by one, and then sprayed to control, the effect is very good. Using fly-killing paper to trap and kill adults, because the adults have yellowing, the yellow board can be used to apply oil to trap and kill. ② medicament control: you can use 1.8% Efortin EC 3000-4000 times, or 90% Wanling wettable powder 2500-3000 times, or 98% Batan powder 1500-2000 times, or 50% fly maggot powder 2000 times spray. Spray once every 7-10 days, 2-3 times in succession. Pay attention to alternating use of drugs. The control of adults should be sprayed in the morning or evening, and the control of larvae should be carried out in the low instar stage, that is, when the length of most insect pests is less than 2 cm. Protected areas can be fumigated with dichlorvos.