Whitefly
In the fall, most vegetables have been cultivated using greenhouses or greenhouses. At this time, the hazards of whitefly will gradually increase due to the cultivation of vegetables, and the following methods can be used to prevent and control the disease:
The smog method uses 22% of the dichlorvos smoke agent of 0.5 kg per mu, and closes the smoke in the evening shed, or 80% of the dichlorvos EC 0.4-0.5 kg per mu, and is poured on sawdust and other carriers, plus a few burning red coal balls. smoke.
Spraying method can be used 10% Buprofim EC 1000 times, or 10% imidacloprid WP 1000 times, or 2.5% Kung Fu EC 3000 times, or 20% chloramphenicol 2000 times, or 80% Dichlorvos 1000 Double fluid, spray once every 5 to 7 days, continuous medication 3 to 4 times.
Due to overlapping generations of whiteflies, there are various species of insects on the same crop at the same time, and there is currently no class of agents that are applicable to all species. Therefore, in the case of control by using chemicals, drugs must be used several times or alternately in order to obtain good results. Control effect.
Liriomyza sativae
Liriomyza sativae Blanchard is a quarantine pest with very serious hazards. It is widely distributed, spreads quickly, and is difficult to control. It is harmful to cucumbers, tomatoes, eggplants, peppers, beans and other vegetables cultivated in facilities. The following methods can be used for prevention and control:
Agricultural control implements rational rotation of vegetables, crucifers, liliaceae, and other unwelcome vegetables, such as fruits and legumes, legumes, and other vegetables; appropriate thinning and increased field permeability; and timely removal of larvae during growth period. Diligently cultivating, increasing the frequency of irrigation, eliminating insects; when transplanting seedlings, manual removal of insect leaves; after the harvest, clean the pastoral areas, and concentrate the damaged crop residues deep in the ground, or spread fertilizer or burn.
Yellow plate trapping kills adult of Liriomyza sativae on yellow. Hang a piece of yellow plate of 20 centimeters and 20 centimeters in height in the shed, and apply a layer of viscous oil (with a little oil and a little oil on the 10th oil) to trap and kill.
Chemicals prevent and control Liriomyza sativae is short in generations, strong in fertility, and prone to drug resistance. The key to chemical control is to grasp early, and focus on the prevention and control of vegetable seedlings. Spray time is best from 9 to 11 am. Commonly-used pharmaceuticals include 48% of Loester EC 800 to 1000 times, 25% spotted EC 1,500 times, 98% Bataan 1500 times, 1.8% EDT, 3000 times, and 5% lefroling EC 3000 times liquid, 20% Kang Fu more than 4000 times liquid and so on.
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