Seize the diamondback moth at high growth stage

Plutella xylostella has strong resistance to certain pesticides. We should alternately apply different pesticides according to its characteristics, seize the peak period, and control.

First, the application of bacterial insecticides. For lepidoptera pests such as the diamondback moth, control with bacterial insecticides works well. There are many types of bacterial insecticides, and the domestic first high-efficiency Bt, that is, Bacillus thuringiensis. The commonly used dose is 8000 IU/mL per mu, diluted by 500-1000 times spray. Bacterial insecticidal bacteria imported abroad 3.2% enemy Po can be mixed powder, 7.5% Kang Du Hui suspension agent, 50% are all along the blend of powder and so on.

Second, apply antibiotic pesticides. Antibiotics such as 1.8% Eforing EC, 1.8% Eliminating Emulsion, etc., are used at a concentration of 1:2000. The active ingredient in the antibiotics is avermectin, and the pesticides that are formulated with avermectin and Bacillus thuringiensis are Suawi and Sudan. The drug efficacy lasted 10 to 15 days, more than twice the efficacy of chemical pesticides.

Third, use pesticides such as insect growth regulators. One can use Khan (10.8% pyriproxyfen EC) 800 to 1500 times spray; two available support (1% emamectin benzoate ten German import insect pest) 10 mg water 30 pounds spray ; Three can be quik (chlorfluazuron 5% EC) 30 ~ 60 ml water 30 kg spray; four available sword (avivichlorophene) Suspension 30 to 50 ml per mu, watered 60 to 90 kg, Control effect for up to 15 days.

The above types of pesticides should be selected flexibly according to the actual situation in each region. One should pay attention to the use of drugs during the high period; the second should be applied during the low-age of the larvae; and the third should be cross-administration, and one species of pesticide should not be used frequently.

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