The selection of low-toxic pesticides has become a favorite among farmers. The control effect on whitefly is also obvious. The whitefly is also called "white moth". Although the length of the insect is less than 1 mm, it is heterozygous due to its diet. The breeding is fast, the amount of eggs is large, and the amount of occurrence is large. In addition, the insect has the characteristics of strong migration, long time of harm, strong drug resistance, etc., which causes great difficulties in prevention and treatment, so that the farmers think that it is “not cleanâ€. In this regard, the author specially wrote the following for the reader's reference. Inject Mould,Oem Inject Mould,Plastic Inject Mould Neway Rubber Products Co., Ltd. , http://www.lxrubbers.com
I. Prevention and treatment methods: It is not advisable to use high-toxic pesticides during the prevention and control, in order to protect the bee larvae, the horned bee, the bee, the ladybug, the grasshopper, the flower bud, etc. Natural enemies. You can set up a yellow plate to trap the adult in the greenhouse or in the field (paint the plate in orange and then apply a layer of viscous oil, such as using No. 10 oil and a little butter to mix thoroughly). It is recommended to use the following agents to control:
1. 5% acetamiprid 800 times solution. The drug is the preferred pesticide currently used to kill the sucking pests. The cost of controlling the whitefly is low, the effect is obvious, the cost performance is high, and the insecticidal activity of imidacloprid is higher under the cool weather in autumn. It is recommended to mix with other ingredients to reduce costs and improve efficacy.
2, 25% of chlorpyrifos (thiazinone) 1000 ~ 1500 times liquid. It has no direct lethal effect on adults, and it usually takes effect 3 to 7 days after administration, but it has a long-lasting effect. It is necessary to pay special attention to the fact that the drug is susceptible to brown spots and whitening and whitening of cabbage and radish.
3, 25% Aketai (thiamethoxam) 2500 ~ 5000 times liquid. The insecticidal rate is slower, and the peak of dead insects is generally 2 to 3 days after application.
4, "邯科 140" 3000 times liquid + Nongxi No. 1 1000 times liquid. According to the cotton farmers test, in addition to the treatment of whitefly, the effect can reach about 90%, and can simultaneously treat aphids, red spiders, beet armyworms, cotton bollworms, cabbage caterpillars, etc., with a duration of 10 to 15 days.
5, Germany Bayer's "Acre Wangte" 4000 ~ 5000 times liquid. The ingredient of this medicine is spirotetramat, which is a new type of pesticide with bidirectional systemic conductivity by interfering with insect fat biosynthesis and causing larvae to die. According to trials in Qingzhou and Liaocheng, a spray can last for 15 to 20 days.
Second, special reminder
1. “Prevention of early treatment and small treatment†is the key to obtaining the best control effect. When the population density is low and the insect age is small, prevention and control can have a multiplier effect.
2, in view of the weakness of its ability to reduce activity in the evening, it is important to master the drug in the evening. Also pay attention to uniform and fine spray to improve the control effect and reduce the spread of debris.
3, due to the large density of tobacco powder mites, overlapping generations, should be sprayed once 3 to 5 days after the drug. And pay attention to alternating medication and reasonable compounding to avoid the emergence of drug resistance.
4. There is a layer of stencil white powder on the worm body and wings of B. tabaci, and a small amount of neutral detergent powder (concentration not exceeding 0.05%) can be added to the prepared drug solution to improve the insecticidal effect.
5. Pay attention to the rational application of phosphorus and potassium fertilizers, which can not only promote the high yield and quality of crops, but also reduce the damage of whitefly.