Agricultural prevention and control:
The main research results are as follows: (1) Promote the cultivation of celery that you do not like to eat in the stubble of energy-saving greenhouses. Crops such as garlic yellow are more tolerant of low temperatures, but less cucumbers. A place to grow tomatoes.
(2) Cultivate "insect-free seedlings", separate the nursery from the production energy-saving greenhouse, thoroughly fumigate and kill insects before seedlings, remove weeds and residual plants, seal nylon yarn in the vents, and control the source of foreign insects.
(3) Avoid eating cucumbers. tomato. Mixed grown legumes.
(4) Energy-saving greenhouse. Avoid planting cucumbers near energy-efficient greenhouses. tomato. eggplant. Whitefly, such as legumes, produce severe vegetables. Advocate the cultivation of white planthoppers and do not like to eat cruciferous vegetables to reduce the source of insects.
Chemical control: Due to overlapping generations of whiteflies, the same crop has different insect forms at the same time, but there are currently no effective species for all insect states, so chemical control methods must be used several times in a row. The available agents and concentrations are as follows:
The main research results are as follows: (1) 10 lark emulsion (also known as cypermethrin). You know. Arad. Applause, the active ingredient is 1000 times that of thiazide buprofenine, which has a special effect on whiteflies.
(2) 25-iron mite ec 1000 times. Eggs and nymphs are effective.
(3) 20 tons of concentrated solvent 4000 times liquid or 10 heavy wetting powder 2 g / mu, valid for 30 days.