Current opinions on the prevention and control of pests and diseases of locusts
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1, clear ditch drainage, timely ventilation and dehumidification; timely removal of diseased leaves, diseased fruit; balanced fertilization to improve plant resistance; using yellow sticky board to trap.
2. Chemical control:
(1), gray mold: available 20% profitable smoke agent 4-6 pieces / mu smoked; or 40% Shi Jiale 800-1200 times liquid, or 50% speed Keling 2000 times liquid, or 50% phlegm 1500 times liquid Spray, once every 7 days, even 2-3 times, alternate medication. Adding 0.1%-0.2% 50% carbaryl or 50% polymyrophylline to the flowering liquid can prevent fruit onset.
(2) Sclerotinia sclerotiorum: Spray with 40% Shijiale 800-1200 times solution, or 50% speed Keling 2000 times solution, or 50% chlorhexidine 1500 times solution, or use the above pesticide to make a paste to spread the affected area.
(3), leaf miner: can be sprayed with 75% chlorfenapyr wettable powder 5000 times solution, or 48% lesbian emulsifiable oil 1000 times solution.
At present, rapeseed is in the initial flowering stage. It is necessary to pay attention to the prevention of sclerotinia. The agent can use 70% methyl thiophanate 75g or 50% carbendazim 100g or 50% quick kelin 50g per acre, and spray 50kg with water.