Prevention of objects 1 Economic crops: cotton bollworm, red bollworm, bridge worm, tobacco budworm, etc. 2 vegetables: cabbage caterpillar, diamondback moth, rapeseed and so on. 3 food crops: stem borer, stem borer, rice borer, rice leaf roller, corn borer, etc. 4 fruit trees: pine caterpillars, peaches, heartworms, large-scale moths, leaf-rolling moths, etc.
Other pests such as cabbage caterpillar, tobacco budworm, bean hawk moth, bridge worm, corn borer, pine caterpillar and fruit tree pests can be applied at the peak of spawning or at the young age.
Dilution concentration The dilution concentration should be determined according to the content of each manufacturer's product. For example, the dilution concentration of raw green Bt produced in Wuhan is: 380-1000 times of cabbage caterpillar, rice borer, and larvae; 500-800 times of diamondback moth, pine caterpillar, and tobacco budworm; 250-500 times of cotton bollworm and rice leaf roller Corn mash can be made into 30 times granule snack with coarse sand or 300-500 times liquid.
How to use It should be done four times: look at the temperature, the temperature is 25 ~ 30 ° C is appropriate, it is best not to use below 20 ° C; the second to see the humidity, the greater the humidity, the better its effectiveness. Spraying powdered Bt pesticide should be carried out in the morning and evening when there is dew, in order to facilitate the adhesion of the microbial agent to the stems and leaves, and promote the spore reproduction, increase the chance of contact with the pests, thereby improving the insecticidal effect; three to see the sun, in order to avoid the sunlight The damaging effect of ultraviolet ray on bacterial spores is best used after 16:00 in the cloudy or sunny days. If the crude molasses or corn syrup or washing powder can be added to the powdered Bt pesticide, the control effect is better: Look at the rain, in order to ensure the efficacy of the drug, be sure to refer to the weather forecast when using, to ensure that there is no medium to heavy rain within 1 to 2 days after application, should choose cloudy or light rain application, after the spray, in case of heavy rain, you need Make up the spray.
Other pests such as cabbage caterpillar, tobacco budworm, bean hawk moth, bridge worm, corn borer, pine caterpillar and fruit tree pests can be applied at the peak of spawning or at the young age.
Dilution concentration The dilution concentration should be determined according to the content of each manufacturer's product. For example, the dilution concentration of raw green Bt produced in Wuhan is: 380-1000 times of cabbage caterpillar, rice borer, and larvae; 500-800 times of diamondback moth, pine caterpillar, and tobacco budworm; 250-500 times of cotton bollworm and rice leaf roller Corn mash can be made into 30 times granule snack with coarse sand or 300-500 times liquid.
How to use It should be done four times: look at the temperature, the temperature is 25 ~ 30 ° C is appropriate, it is best not to use below 20 ° C; the second to see the humidity, the greater the humidity, the better its effectiveness. Spraying powdered Bt pesticide should be carried out in the morning and evening when there is dew, in order to facilitate the adhesion of the microbial agent to the stems and leaves, and promote the spore reproduction, increase the chance of contact with the pests, thereby improving the insecticidal effect; three to see the sun, in order to avoid the sunlight The damaging effect of ultraviolet ray on bacterial spores is best used after 16:00 in the cloudy or sunny days. If the crude molasses or corn syrup or washing powder can be added to the powdered Bt pesticide, the control effect is better: Look at the rain, in order to ensure the efficacy of the drug, be sure to refer to the weather forecast when using, to ensure that there is no medium to heavy rain within 1 to 2 days after application, should choose cloudy or light rain application, after the spray, in case of heavy rain, you need Make up the spray.
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