End of summer and early autumn to control vegetable field

At present, it is the peak period of occurrence of Bemisia tabaci. A large number of Bemisia tabaci directly suck the leaf sap of plants, causing the plants to weaken and secreting honeydew to cause the occurrence of coal pollution. In addition, it can spread 70 or more virus diseases in more than 30 kinds of crops, causing serious damage. In order to reduce the losses caused by Bemisia tabaci, the vegetable farmers should do a good job of prevention and control in a timely manner based on the principle of “prevention, prevention, and treatment”.

Clean the garden, reduce the source of insects

Bemisia tabaci can multiply on weeds and become a source of transmission. Therefore, we must pay attention to removing weeds from the field and the surrounding areas of the shed, and keep the area around the shed clean.

Cultivation of insect-free seedlings

The seedling shed and the production shed should be separated. The nursery shed should be thoroughly sterilized before raising the seedlings. The nursery net room with 50 mesh or more pest control nets should be set up. When a pest seedling is found, it can be promptly removed. The pesticide can be used for prevention and control before colonization to ensure that the colonization seedlings are worm-free. seedling.

Air outlet covering insect net

The production booth air outlet covers a 50-mesh insect net and is physically blocked to prevent the whiteflies from flying into the facility.

Hanging yellow board

In the seedling shed and the newly planted shed, yellow boards are suspended in a timely manner. The height of the suspension should be 5-10 cm above the plant growth point. With the height adjustment of the plants, 25-40 pieces of 3040 cm yellow boards are suspended per mu.

Biological control

In the early stage of Bemisia tabaci (around 0.5 head per plant), the larva was released for the first time. The larvae released once more than 3, 1, and 7-10 days, releasing 3-4 times continuously.

Chemical control

The use of pesticides should be prevented early and treated small. When the population density of Bemisia tabaci is low, the nymphs of the 1st instar nymphs are thin and cannot be crawled. The chance of exposure to pesticides is high, and the resistance to insecticides is poor and easy to control. In addition, the weak activity of tobacco powder in the evening, can be used in the evening medication. The use of agents with different active ingredients, such as mineral oil, spirotetramat, clothianidin, and floxamidine, is used for rotation. Medications should pay attention to safety intervals and cannot be harvested in advance.

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