Green worms are very harmful to winter melon, what are the green worm control drugs?

If green worms appear during the growth period, you can use medicine during the day, confirm the time of spraying, before 7 o'clock in the morning, after 6 o'clock in the afternoon, and not before 9 o'clock in the morning, because the sun is now June, and the sun is big at noon, and the green worms will hide on the back of the leaves. The time of spraying pesticides should be selected before 6 o'clock in the morning or after 6 o'clock in the afternoon, these two time periods are the most active green insects, and effective pesticide spraying can achieve the purpose of eliminating green insects. It comes out relatively early, and the effect of spraying is good on the control of green worms.

You can use 2500-3000 times the liquid top 100 pesticides.

Don't go before nine o'clock in the morning, because now the sun comes out early, the temperature rises faster, after six o'clock the leaves of the peanut have been dried for a day, has been closed, after closing, the pesticides we spray are easy to hit all parts of the peanut, so the effect is also better at this time. Moths were found in the field.

, it should be medicated. 3000 times of 20% chlorantraniliprole solution was evenly sprayed on peanut leaves; At the same time avermectin.

Milk diluted 2000-3000 times + imidacloprid.

4000 times) or 50% phosphine.

Emulsifiable concentrate is diluted 1000 times for spraying.

or light moths and willows.

The culling of moths can effectively reduce the oviposition of adults in the field, and at the same time, combined with crop rotation, to avoid heavy planting. Scientific fertilization, timely manual removal and culling of egg masses and a large number of larvae found in field management can also control the occurrence and reduce the damage. We can use cyhalothrin.

Chlorantraniliprole + avermectin, these three pesticides are compounded, and then sprayed again to control green worms and red spiders.

Because the sun comes out earlier now, the temperature rises relatively quickly, after six o'clock, the leaves of the peanut have been dried for a day, and they have been closed, and after the closure, the pesticides we spray are easy to hit all parts of the peanut, so the effect is also relatively good at this time. Peanuts should be planted three times, and the second time you can compound acetamiprid and kung fu methrin, so that the larvae can be prevented very early.

During the prevention and control, 20-40 ml of 5% fipronil suspension can be used, and 50 kg of water per mu can be sprayed. You can also use 15-25 ml of 1% emamectin EC per mu, mixed with 50 kg of water, and the effect is also better. If there are few insect infestations, you can use a light source to trap them.

Green worm control drugs: dichlorvos, trichlorfon, cyhalothrin, indoxacarb, fiproramide. Trichlorfon, 80-100 grams of 80% trichlorfon soluble powder, 75-100 kg of water for spray control, the safety interval should not be less than 7 days.

Filuramide, spray with 10% fiproramide 2000 times in the evening, and change the dressing when the pests become resistant.

There are many kinds, taking cabbage worm as an example, the specific drugs that can control cabbage worm are dichlorvos, trichlorfon, cyhalothrin, etc. In addition, bactericidal bacillus powder and green worm powder had a good control effect on tobacco worm before the third instar. After harvesting or before planting, irrigation and drowning, deep ploughing and fine raking, physical and mechanical killing of larvae and pupae eggs, etc., can reduce the source of insects.

Before the larvae are instarred, they can be sprayed with drugs such as 20% rice full or 25% chlorpyramide No. 3 1000-2000 times.

The specific drugs that can control cabbage worm include dichlorvos, trichlorfon, cyhalothrin, etc. If dichlorvos is used for prevention and control, it can be sprayed with 1500-2000 times of 80% dichlorvos emulsifiable concentrate; If trichlorfon is used for control, 80% trichlorfon soluble powder can be used 80-100 grams per mu and 75-100 kg of water for spray control.

Dichlorvos and trichlorfon, these are all drugs for the control of green worms, and the efficacy of these drugs is very strong, 5 times that of ordinary drugs.

Throw a few bamboo tails on the slope, scattered can winter melon vines climb up naturally, climb everywhere, basically do not need to manage, the winter melon grows after the wild boar, porcupine, squirrel and so on do not touch, because the melon outside a layer of prickly hair, or prickly those wild animals nose is particularly uncomfortable, when planting winter melon, we should choose the soil rich in organic matter, because the root system of winter melon is very developed, and it is appropriate to add some fermented livestock manure to the land. Add some compound fertilizer and stir well. It is advisable to choose a place with good water and plenty of sunshine.

Remove the side vines. Stay the main vine. Select 23 to 26 nodes of normal development of young fruits, weighing 5 to 8 catties of hanging fruits.

Moreover, the scale of cultivation continues to expand, so that the people can eat fresh winter melon all year round. So how to plant winter melon scientifically and achieve the ideal harvest results is the most concerned issue for our growers. Today I will be based on the local planting experience, winter melon erection scaffolding should be carried out when the vine is started, 25-30 days after planting, you can arrange the melon vine on the shelf, after the shelf every 20-30 cm with a rope to tie the vine once, the melon vine is fixed on the shelf, and at the same time combined with the vine to remove the excess side branches, tendrils and excess female flowers.

Forty days later, after the rain, the bottom of the teacup was cut off, two seedlings were left, and one seedling was left, and the field was cultivated according to the plan. Winter melon can not be put on the shelf in the dry source land, because after the shelf, there is a filament at the corner of each page, and this filament can only bear winter melon after it takes root in the ground, if the filament at the corner of the page cannot be rooted, when the seedlings grow to 20 to 30 cm long, if the land area is relatively wide, we can consider allowing them to crawl directly along the ground. It can also be fertilized by mixing and roasting the selected fertile garden soil or fire marl, rotting pig manure, cow dung residue and rice husk ash.

When they grow to 50 cm long, cultivate a little fermented chicken manure fertilizer and loess on their stems, and you don't need to go to the bamboo tail to lead the seedlings, so that their vines and grapes lie on the ground, just when it comes to their winter melons, use some wooden boards, red bricks, and foam boxes to isolate the winter melons from the ground, and don't let the winter melons rot!

Pesticides. Because after my winter melon is sprayed with pesticides, the green worms are gone, so pesticides should be used to prevent and control them.

In general, non-melon crops are used for planting, and measures such as deep soil planting can be adopted, and insect pests can be buried deep in the soil so that they cannot reproduce and grow, or lime, organic fertilizer, phosphorus and potassium fertilizers can be applied. At the same time, it is also possible to keep a vent in the greenhouse, and it is best to open a window under the greenhouse to avoid insects and bacteria from drifting into the greenhouse.

Varieties that are resistant to pests and diseases should be chosen, and they can also be sprayed with pesticides for control.

Leaf spot disease is characterized by gray-brown lesions on holly leaves, mostly round or oval, and gray-white mold layer on the surface of the diseased part when the humidity is high. The prevention and control measures are as follows:

Remove and burn diseased leaves in time to reduce the source of infection; soil application of oak leaves or cottonseed meal; Copper preparations such as plant spraying Bordeaux liquid or fungicides such as Fumei iron can be sprayed with 600 times of 75% chlorothalonil wettable powder.

Branch blight This disease causes the skin of holly trees to turn brown, large leaves to wither and fall, and the plant dies because the plant is unable to obtain nutrients. The symptoms of the disease are very similar to those of the plant due to water loss and death, so it is necessary to pay attention to the distinction and detect the disease in time. And once the symptoms appear, they are often more serious, and it is relatively difficult to prevent and treat, so prevention is generally the main thing.

The specific prevention and control methods are as follows:

Immediately after pruning, spray 800 times of Xinzi wettable powder and 1000 times of amidinechloraz to protect it from the invasion of germs;

Spray a fungicidal agent 600 times sterile liquid or Xinziqing wettable powder 600 times liquid spray every 10 days, and spray three times in a row.

Root rot can be sprayed with 10% antibacterial agent 401 acetic acid dissolved 1000 times overnight.

For the prevention of insect pests, it is first necessary to choose healthy wintergreen seedlings for planting, the planting density should be appropriate, pay attention to aeration, etc.

For aphids, leafhoppers and scale insects, 50% pine borer emulsifiable concentrate can be sprayed 1000 times. In the event of red spider damage, it can be sprayed with 1000 times of 20% dicofol sulfone wettable powder.

In addition, there is also the common damage of the round shield scale, the symptoms are that the leaves appear punctate yellowing at the beginning of the damage, and the whole yellowing is severe and then die. It can be sprayed with 2000 times of 48% Wanling powder.

After the holly cuttings, it is required to build a shed for shade to reduce transpiration and direct sunlight on the seedbed. When cuttings are made in early spring or late autumn, they should also be covered with film to prevent winter damage. After cuttings, it should also be watered frequently to keep the seedbed soil moist, and the soil on the surface of the seedbed should not be white.

Top dressing of cuttings can be carried out in combination with watering, and foliar spraying can also be carried out with phosphoric acid: hydrogen potassium plus urea. The weeding work should be very meticulous and do not collide with the cuttings.

French holly has strong stress resistance, few pests and diseases, and occasional stinging moths or aphids, which can be sprayed and controlled by pesticides such as dichlorgongs and imidacloprid.

Holly is propagated by cuttings, and generally takes root about 25 days after cutting, and new shoots germinate and grow about 40 days after cutting. Cultivation for 3 to 4 months, when the seedling height is 15-20 cm, it can be transplanted, and the success rate of cuttings is more than 95%.

The choice can only be made by determining the type of pest and disease.

A common disease of holly.

Leaf spot. Symptoms manifest as grayish-brown spots on the leaves of holly, mostly round or oval. When the humidity is high, the surface of the affected area is covered with grayish-white mold spots.

The prevention and control measures are: remove the diseased leaves in time and burn them to reduce the source of infection; apply oak leaves or cottonseed meal to the soil; Plants can be sprayed with copper preparations such as Bordeaux liquid or fungicides such as formosis, and 600 times the 75% chlorothalonil wettable powder can be sprayed.

Twig blight. This disease causes the branches of holly to turn yellow, the leaves to wither and fall off in large quantities, and the plants die due to lack of nutrients. The symptoms of the disease are very similar to those of plants that die after dehydration, and it is necessary to pay attention to the hidden and closed intentions to distinguish and detect the disease in time.

And once symptoms appear, they are often severe and relatively difficult to prevent. Prevention is generally the main focus. The specific prevention and control methods are:

Immediately after pruning, spray 800 times of Xinzi wettable powder and 1000 times of amidine to protect against germs from invading the wound; Spray 3 times every 10 days with a sterile solution of biocide 600 times or a new purple 600 times wettable powder.

Root rot. It can be sprayed with a 10% antibacterial agent 401 acetic acid solution that dissolves 1000 times.

Holly is a common insect infestation.

For the prevention of insect foci without cracking, it is first necessary to select healthy holly seedlings for planting, with appropriate planting density and ventilation. For aphids, leafhoppers, and scale insects, 50% thiophos can be sprayed with 1000 times of thiophos EC1000 times. Spraying 20% rust would rather than wetting 1000 times to kill red spiders.

In addition, the round shield scale also has common damage, the symptoms are: in the early stage of the damage, the leaves are punctate and yellow, and in severe cases, the whole leaves turn yellow, and then die. It can be sprayed 2000 times more than 48% panacea powder.