Common pests and diseases in crops in August, how to prevent and cure quickly?

August is a high incidence of crop diseases and insect pests. Corn, rice, beans, vegetables, etc. will be affected to varying degrees by pests and diseases. If not paid attention, it will pose a serious threat to food production. How to prevent pests from "accounting after the fall", and quickly treat the drugs according to different crops!

corn

Summer maize will be pollinated after entering August. The main pests and diseases in the middle and late stages of corn include corn top rot, brown spot disease, stem-based rot, corn borer (heartworm), cotton bollworm, armyworm, and corn borer.

Due to the current high density of summer maize planting and the high planting in the middle and late stages, the plant protection drone can be fully utilized to carry out the “one-spray and multi-effect” fly-fighting operation of the pests in the middle and late stages of corn, so as to achieve disease prevention, pest control, stress resistance and yield increase. The “one spray multi-effect” of corn should focus on the application of “preventive technology”, and the prevention and treatment time should be selected after August 15 (after corn pollination).

Recommend "one spray multi-effect" agent:

Insecticide : 5% KM salt dispersion granules, 25 g/L cyhalothrin emulsifiable concentrate, 5% imidacloprid emulsifiable concentrate, 70% imidacloprid WP, ​​5% acetamiprid emulsifiable concentrate, 5% chlorantranilipros Amide suspension.

Fungicide : 80% tebuconazole wettable powder, 10% difenoconazole cream, 70% methyl thiophanate wettable powder, 25% azoxystrobin suspension.

Foliar fertilizer : urea, nitrogen-containing foliar fertilizer, 5% amino oligosaccharide.

Rice

In August, rice gradually entered the stages of heading, flowering, filling and maturity, mainly including three (two) phlegm, rice planthopper, rice blast, rice blast, sheath blight, rice smut, etc. Do not do a good job in the control of pests and the prevention of diseases. When the pests and diseases occur seriously, it will cause white ears, dead yellow and litter, and increase in the number of grains, which will have a great impact on the yield.

Prevention opinions:

Adhere to the principle of comprehensive prevention and control of agricultural control, agricultural control and chemical control, agricultural control measures to control the application of grain fertilizer, look at the sky, see the ground, see the appropriate formula fertilization, the water layer must be shallow, appropriate drying, control Field humidity creates a field-growing environment that is conducive to rice growth and is not conducive to the development of pathogens.

Chemical control advocates the use of high levels of single-agent pesticides , avoiding the use of low levels of compounding agents. Pay attention to the timely investigation of the paddy field during late sowing, late maturity and greed, and timely control. In the prevention and treatment, the corresponding pesticides should be selected for pests and diseases. For example, insecticides such as trichlorfon, dichlorvos, etc. can be used. For disease prevention, rice bran, tricyclazole and other drugs can be used to prevent and reduce the loss. It is necessary to apply water after spraying.

In the prevention and treatment should pay attention to: First, the field is heavy, the density is large, the plant color is dark green, it is necessary to take early medication. The second is to spray at least 15 kilograms of water per mu. The third is best to be cloudy or spray in the afternoon. Fourth, the combination of anti-disease agents and potassium dihydrogen phosphate or foliar fertilizer can improve the control effect.

Bean rust

Bean rust is a gas-borne disease that spreads quickly and is highly harmful. If the conditions are appropriate, it will soon develop in the whole field. The typical symptoms are yellow-brown or dark-brown blister plaques. It can be sprayed with 15% triazolone wettable powder 1000-1200 times liquid, or 50% rust emulsified milk 800-1000 times liquid.

Early blight

Early blight is an important disease of tomato, pepper, eggplant, etc., and the leaf is the most seriously damaged. The typical symptom is that the leaf lesion is round or nearly round, the edge is brown, the center is light gray, the lesion has a concentric pattern, and the black is black when the humidity is high. Mildew. It can be sprayed with 70% mancozeb wettable powder 600 times solution or 75% chlorothalonil wettable powder 600 times solution.