When planting vegetables, how to prevent and control yellow bending nails?

When planting vegetables, how to prevent and control yellow bending nails? In the growth process of cabbage, radish, cabbage and kale, there is a pest and disease that is very harmful, bothering vegetable farmers and affecting the quality and yield of vegetables. The larvae and adults of the striped leaf borer damage the roots of the soil and the plants on the ground, respectively.

<> adults have strong reproductive ability and serious overlap of generations, which is not conducive to jumping and migration, and is extremely difficult to control. Adults have a lively jumping ability, jump and escape in jumping, have more habitats, in dorsal seams, roots and soil, and have frequent feeding activities from 8 to 10 a.m. and 4 p.m. to 6 p.m., often touching two leaves, vegetables or sticks to soften the feeding, thereby reducing leaf stomata, photosynthesis, and finally only leaf veins, and even death, high humidity may occur. Adult worms produce more sunlight and eggs are laid in soil within 3 cm of the roots of the crop.

When the eggs hatch, the relative humidity is required to be above 80%. After hatching, the larvae strip off the epidermis of the roots along the fibrous roots to the straight roots, forming irregular strip-like scars, and can also bite off the lateral roots, causing the leaves of the plant to turn yellow and wilt, and even cause the spread of soft rot caused by rot. Occurrence trend:

In North China, there are generally 4-5 generations a year, and 7-8 generations in South China and north of the Yangtze River, and the adults overwinter in dead leaves, grasslands or soil crevices; In the south of the Yangtze River, there is no obvious overwintering phenomenon. The optimal temperature of the striatum is 21-27, below 18 or above 28, and the activity of adults is low. There are two peaks every year in spring, summer and autumn.

The first peak occurs from the beginning of April to the end of May, and the peak occurs from June to August due to high temperatures. The peak peaked again after mid-September due to the drop in temperatures. Larval control:

The larvae live in the soil and are more difficult to control.

The optimal control period for larvae is 13-16 days after the peak adult stage, and the roots are irrigated with 40% chlorosamer. It can also be treated with 70% thiamethoxam seed coating. Adult control:

The use of avermectin, trilobite, thiamethoxam, cyhalothrin, matrine and other agents, the adult worms just unearthed in the morning or 5-6 o'clock in the afternoon are used for drug control, if the adult worm is latent or actively sprayed with pesticides, the control effect is poor. Adult striped leaf borer has phototaxis and a strong yellow tendency. Yellow planks can be hung in the field to attract pests such as striped leaf borer and diamondback moth.

Generally, there are 20-30 blocks per mu, which are replaced about once a week. In the host crop planting area, vibrating frequency insecticidal lamps are installed every 70-80 meters. From early May to late October, prevention and control will be carried out within 10 meters of the light source.

In the early stage of its sowing should be timely removal of weeds, during the growth period can also be used related drugs for control, the use of pesticides and fertilizers, timely spraying after the rain to prevent and control, to spray regularly, to ensure the yield and quality of vegetables.

You can choose to intercrop or intercrop with perilla, you can properly turn the soil, increase fertilizer, and spray some chemicals.

It can be sprayed with chemicals and the soil should be turned up properly, which can kill bacteria.

Vegetables and fruits, yellow bend strips, jumping nails, in the Qingjiang crane this place, farmers called the ground jumper, jumping flea. It is a pest of the Coleoptera leaf beetle. The key damage is cabbage, radish, cabbage, cauliflower and other cruciferous vegetables and nightshade vegetables and fruits, legumes and melon vegetable crops.

The effects of Astragalus chinensis on vegetables and fruits were manifested in the residual consumption of flower bones, young pods, and vegetable stems and leaves. Among them, the stalks and leaves of the seedlings were the most. As a result, small seedlings were excavated, dead seedlings and broken ridges.

In production, farmers are in the case of preventing vegetables and fruits from jumping off the nail.

Therefore, when weeds compete with vegetables and fruits in the field for fertilizer and water, it is necessary to chemically control the weeds in the field in time, which can not only reduce the damage of weeds to the sparse vegetables, but also destroy the living environment of the Huangqu jumping beetle, so that it can not grow and develop. Symptoms of being harmed by the dance of yellow bends: The yellow bend jumping beetle is caused by nymphs gathering on the leaves of vegetables and fruits to gnaw on the damage, and there are more on the reverse side of the leaves, so that there are small oval small round holes gathered on the killed leaves.

Or cyfluthrin acetamiprid (50 grams of related ingredients), each bottle is sprayed with 1 bucket of water in a sprayer, and it can also reasonably kill the yellow koji jumping beetle. Because the yellow bend jumper likes to harm cruciferous green plants, it is necessary to promote the rotation planting of vegetables and fruits of the non-cruciferous family when planting to prevent the probability of large-scale generation and transmission of pests and diseases. In addition to rotation, you can also choose the form of intercropping planting, which can be interplanted or planted with vegetables and fruits containing special odors and aromas, such as being able to carry out rotation planting with crops such as Xianglai and onions, ginger, garlic, melons, fruits and vegetables.

When planting, this vegetable field needs to be weeded and turned in advance to prevent insect pests, etc., and at the same time, some lime grass and wood ash should be used for prevention.

When planting vegetables, the vegetable fields that are ready to be cultivated should be turned over in advance, and at the same time remove weeds, residual vegetable leaves and other pest food, and then sprinkle an appropriate amount of lime and plant ash according to the needs of later vegetables, which are used to kill part of the pupa, hatchery and larvae, so that they can effectively control the yellow koji jumping beetle.

Vegetable yellow bend strip jumping armor in Qingjiang Crane this place vegetable farmers call it a ground jumper, jumping flea. It is a pest of the Coleoptera lobecidae. It mainly harms cabbage, radish, cabbage, cauliflower and other cruciferous vegetables and nightshade vegetables, beans and melon crops.

The yellow curved strip jumper belongs to the family Coleoptera. This insect is mainly harmful to leafy vegetables, and cruciferous vegetables such as cabbage, cauliflower, cabbage, and rape are often attacked by it. It is also harmful to eggplant fruits, melons, beans and other vegetables.

Vegetables are an important way to supplement vitamins in our daily life, vegetables will inevitably encounter some pests in the planting process to endanger the growth of vegetables, and the yellow beetle is one of the most common pests in the process of vegetable planting. Or cyfluthrin EC (active ingredient content 50 g liters), each bottle is sprayed with 1 bucket of water in a sprayer, which can effectively kill the yellow bending strip jumping nail. Vegetable insect pests are the most harmful to the yellow-striped jumping beetle, the adult of this insect is a small beetle that can jump, about 2 long, harming seedlings and adult leaves, showing many small round holes.

The larvae bite the root bark and bite off the fibrous roots in 3 5 places in the soil, causing the seedlings to die and induce disease.

Jumping nails are especially fond of cruciferous vegetables such as cabbage and cabbage. It is also harmful to eggplant fruits, beans and melon vegetables. Adults are harmful to leaves, causing the leaves to form translucent spots or small holes, which will seriously cause dead seedlings and destroy seeds.

In the dialect of the farmer's sister-in-law, it is called a flea or a vegetable lice, and it is the number one pest that harms crops, especially cruciferous crops. There are two types of beetles: adults, eggs, larvae, and pupa, and there are two insect forms: adults and larvae.

It is only 2 mm large, black and shiny, with a yellow stripe in the middle of its elytra, including its larvae are also pests, mainly for cruciferous vegetables, but also for tomatoes, melons and beans. It is difficult to spray in place, and the general base is large, the fecundity is strong, and the resistance is also strong, which makes it difficult for growers to prevent and control the yellow curved beetle.

Special chemical fertilizers should be used, as this is the only way to prevent this problem.

Generally, it is necessary to fertilize and spray in advance, but harmless pesticides should be used when spraying.

Field management: After the emergence of seedlings and time seedlings, timely seedling, spraying new high-lipid film after seedling, can shorten the seedling period, so that seedlings can quickly adapt to the new environment and grow healthily. Balance water and fertilizer, adopt formula fertilization technology, and appropriately increase phosphorus and potassium fertilizer to enhance the disease resistance of rapeseed.

1. Clean the farm, eradicate weeds, treat the net residue and leaf litter, and reduce the source of insects. Before sowing, the soil is deeply ploughed to create an environment that is not conducive to larvae and eliminate some larvae. When transplanting, insect-free seedlings are selected, and agricultural measures such as crop rotation with non-cruciferous vegetables and fertilizer can be reduced.

2. Adult insect control at seedling stage is the key. The following agents can be used: 50% phosphine emulsifiable concentrate 1500 times liquid; deltamethrin emulsifiable concentrate 2000 times; 25% thiamethoxam water dispersible granules 3000 5000 times solution.

Because the abothic beetle is an important pest in the seedling stage of cruciferous vegetables such as cabbage, it should focus on seedling protection, and the key to the prevention and control of adult insects with pesticides, and implement comprehensive management measures.

1. Implement crop rotation Cruciferous vegetables are rotated with other vegetables, and waterland vegetables and dryland vegetables can be rotated to reduce damage.

2. Clearing the garden and exterminating insects Remove the leaves of the residual plants in the vegetable garden, eradicate weeds, and eliminate their wintering places and food plants to reduce the source of insects.

3. Deep ploughing and insect control Deep ploughing of the soil before sowing creates environmental conditions that are not conducive to the life of larvae, and can also eliminate some insect pupa.

4. Soil treatment Before planting vegetables, 3 kilograms of phosphine granules per mu are prepared and spread with medicinal soil to kill the larvae in the soil.

5. Black light trapping The use of adult insects has the characteristics of phototaxis and sensitivity to black lights, and the use of black light trapping has a certain control effect.

6. Early treatment of seedlings, control of adult vegetable seedlings immediately after unearthing, it was found that insects can be sprayed with 18 insecticidal double 400 times, insecticide powder per kilogram per mu sprayed 1 2 times, or 50 phosphine emulsifiable concentrate 1500 times liquid spray, or 2 Yi Sali 1000 times, 40 Lesben 800 1000 times, 5 Stuck Gram 1000 1500 times liquid spray, or 80 dichlorvos, 90 trichlorfon, 50 malathion 1000 times, 20 rapid killing, dichlorthine 2500 times spray. When larval damage is found in the roots, it can also be controlled by irrigating the roots with trichlorfon, dichlorvos or phosphine.

Grind pecan shells into powder and sprinkle them on top of the vegetables.

Agricultural control strategies:

a. Remove the remnants of the vegetable field and eradicate the weeds.

b. Deep ploughing and drying of the soil before sowing to eliminate part of the pupae.

Pharmaceutical control strategies:

Attention should be paid to the control of adult insects, and it is advisable to spray pesticides in the morning and evening. The following agents can be used:

a. 4000 times of 5% anti-Taibao emulsifiable concentrate.

b, or 4000 times of 5% stuck gram emulsifiable concentrate.

c, or 5% Nongmengte emulsifiable concentrate 4000 times.

d, or 40% chrysanthemum emulsifiable concentrate 2000-3000 times.

e, or 40% chrysanthemum emulsifiable concentrate 2000-3000 times.

f, or 20% fenvalerate 2000-4000 times.

g, or 500 times the solution of artemisinin insecticide.

h. Trichlorfon or phoxanthion solution can be used to irrigate the roots to control larvae.

Diamondback moth hazard characteristics: Diamondback moth mainly harms cruciferous vegetables, such as cabbage, cauliflower, Brussels sprouts, radish, Chinese cabbage, etc. The larvae harm the young leaves and heart leaves, and the hatched larvae semi-infiltrate the leaf tissue, feed on the mesophyll, form transparent spots, and eat the leaves into holes or nicks after 3 or 4 instars.

At the seedling stage, it often concentrates on harming the heart leaves, affecting the growth of vegetables, and when it is serious, the leaves are eaten into a net, which seriously reduces the yield or reduces the value of the commodity. The larvae can also damage the young stems and pods, and bite the pods to eat them all.

Characteristics of the hazard of the yellow bend jumping beetle: the local is also known as the flea, five to six generations occur a year, the generations overlap, the four seasons of the year can be harmed, but from August to October is the most harmful, in addition to harming Chinese cabbage, cabbage, radish and other cruciferous crops, it can also bite into dense holes for the leaves of beans and other damaged crops, and can feed on soybean tender larvae and can also moth into the roots to eat, resulting in multiple insects on the skin of the radish.

Banana leaf spot is a disease caused by a variety of fungi, mainly to damage the leaves, causing banana leaves to dry up, leading to premature plant senescence, affecting the enrichment of banana fruits, and in severe cases, it can reduce yield by 30% to 50%, and the fruit quality decreases, and it is easy to rot. The severity of the disease was closely related to the rainfall and the number of fog in the current year. The disease was serious in banana orchards with excessive planting density, partial application of nitrogen fertilizer and poor drainage. Dwarf varieties are less resistant to disease.

Prevention and control methods: Remove the diseased leaves and dead leaves of the banana orchard and burn them before the beginning of spring every year to reduce the source of initial infection. During the banana growing season, it is best to remove the diseased leaves once a month.

Control planting density. There are 180 acres of dwarf varieties, 145 acres of medium varieties, and 125 acres of high varieties. Apply more potassium fertilizer and phosphate fertilizer, and do not apply nitrogen fertilizer; Timely drainage in the rainy season to reduce the humidity of the small environment of the banana orchard.

Spraying control, now one month before the bud use 25% dichloride demulsifiable concentrate 1000 1500 times liquid or 40% carb suspension 600 800 times liquid, or 75% chlorothalonil wettable powder 800 1000 times liquid whole plant spray, every 15 20 days spray 1 time, a total of 3 5 times, and pay attention to alternate medication to prevent the bacteria from producing resistance, banana leaf spot comprehensive control effect requires that there are still 6 8 green leaves when the fruit is close to the harvest period, in order to ensure that the fruit is large and the yield is high. In the field diagnosis, attention should be paid to distinguishing leaf spot diseases caused by air pollution (such as fluoride, etc.).

The adult beetle is also known as the jumping beetle, the soil flea, the ground jumper, etc.; The larvae are commonly known as white maggots. Mainly harmful to cruciferous crops. The prevention and control measures are as follows.

1) Agricultural control and non-cruciferous crop rotation, regular removal of weeds and litter in the field before sowing and overwintering; Deep ploughing and irrigation before sowing, and fertilizer at the seedling stage to promote strong seedlings.

2) Spraying rape after the appearance of the pesticide to be jumped beetle, the commonly used pesticides are 50% malathion emulsifiable concentrate 800 times dilution, 80% crystal trichlorfon 1000 2000 times dilution, 25% imidothion emulsifiable concentrate 300 400 times dilution.