Prevention and control of main diseases and insect pests of vegetables in flood season

Main disease

Melon powdery mildew: spray treatment with 25% pyraclostrobin emulsion 2000 times solution or 42.4% oxazolidine fluoroamide suspension 3500 times solution, 29% pyraazine azoxystrobin suspension 1500 times solution, etc.

Cucumber downy mildew: spray treatment with 70% Daisen dry suspension 500 times solution or 25% azoxystrobin suspension 1500 times solution, 687.5 g / liter of fluorobacteria · downy mildew suspension 800 times solution, etc. The weather and disease development are prevented 2 to 3 times.

Cucumber bacterial angular leaf spot: 20% thiazole zinc suspension 500 times solution or 46.1% copper hydroxide water dispersion granule 1000 times solution can be used. Excessive use of copper preparations can cause phytotoxicity, pay attention to the concentration and application frequency.

Tomato leaf mold: In the early stage of the disease, 30% pyrimethanil 1000 times solution or 70% Daisen joint suspension agent 600 times solution, 50% ether oxystrobin water dispersion granule 3000 times solution spray, 5~7 Control once a day, continuous prevention 2 to 3 times. In the rainy days, greenhouse vegetables can be fumigation with smoked agents.

Epidemic disease: 68.75% ketone·manganese zinc water dispersible granule 1000 times solution, 23.4% bispropionin suspension 1500 times solution, 10% difenoconazole water dispersible granule 1000 times solution, etc. Initial prevention.

Soft rot: control with 300~400 times of neomycin.

Major pests

Plutella xylostella, Pieris rapae: In the younger larval stage, 60 g / liter of ethyl spinosyn suspension 200 times solution or 5% chlorantraniliprole suspension 1000 times solution can be used for spray control.

Bean wild scorpion: timely clear the field of falling flowers, falling pods, chemical protection key protection flower buds, flowers, tender pods, the drug can be selected with 5% chlorantraniliprole suspension 1500 times solution or 6% ethyl spinosyn suspension agent 2000 times Liquid, etc.

Aphid: It can be sprayed with 22% flufenidamide suspension 1500 times solution or 3% acetamiprid suspension 800 times solution or 10% imidacloprid WP 2000 times solution.

Yellow stripe jumper: You can use 30% chlorfenidil and thiamethoxam suspension agent 2000 times solution to control adult insects or cast underground larvae.

Hummer: In the early stage of spotting, it can be controlled with 6% ethyl spinosyn suspension.

Liriomyza sativae: It can be sprayed with 50% chlorpyrifos WP 2500 times or 1.8% avermectin emulsifiable 2000 times.

Snails and cockroaches: The snails have serious fields, and the 5% acetaldehyde granules are used in 500-650 grams of snails.

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