Bemisia tabaci is also called “little white mothâ€. Although its body length is less than 1 mm, it has high feeding habits, rapid reproduction, large amount of eggs laid, and large amount of occurrence. In addition, the insect has strong migratory ability, long-term harm, and resistance. The characteristics of strong medicinal properties caused great difficulties in prevention and control work, causing farmers to think that they did not play clean. In this regard, the author specifically prepared the following, for the majority of readers reference.
First, control methods: prevention and treatment should not use high-toxicity pesticides to protect against Bemisia tabaci have a good inhibitory effect of the cirrhosa wasp, 桨 蚜 蚜 〠蚜, 蚜 蚜 蚜 瓢, ladybugs, grasshoppers, flower pots, etc. Natural enemies. Yellow traps can be placed in the greenhouse or in the field to kill adult worms (paint the plate orange-yellow, and then apply a layer of sticky oil, such as with a little oil and a small amount of oil on the 10th).
It is recommended to use the following agents to prevent and treat
1, 5% acetamiprid 800 times. The drug is currently the preferred pesticide for killing sucking pests. The control of Bemisia tabaci is cheap, effective, and cost-effective, and the insecticidal activity is higher than imidacloprid under cool autumn weather conditions. It is recommended that pesticides be mixed with other ingredients to reduce costs and improve efficacy.
2, 25% buprofezin (buprofezin) 1000 to 1500 times liquid. There is no direct killing effect on adult worms. Generally, they are effective 3 to 7 days after treatment, but they have a longer effective period. Need special attention is that the drug on cabbage, radish is easy to produce brown spots and green leaves and other phytotoxicity.
3, 25% Aktai (thiamethoxam) 2500 ~ 5000 times solution. The rate of insecticide is slow, and the peak of dead insects is generally 2 to 3 days after application.
4, "Lanke 140" 3000 times liquid + Nongxi 1 1000 times liquid. According to the cotton farmer experiment, the effect of the control of Bemisia tabaci can reach 90%, and it can simultaneously treat aphids, red spiders, beet armyworm, cotton bollworm, cabbage caterpillar and so on. The effective period is 10 to 15 days.
5, Bayer company's "Muwang special" 4000 to 5000 times liquid. The composition of the drug is spirotetramat, which is a new type of pesticide with two-way systemic absorption and transmission properties. It mainly causes the death of larvae by interfering with the fat biosynthesis of insects. According to experiments in Qingzhou, Liaocheng and other places, a spray can last for 15 to 20 days.
Second, special remind
1. "Treatment and early management of small" is the key to obtain the best control effect. In the case of a low population density and a small age, the prevention and control can have a multiplier effect.
2. It is very important to control the use of drugs in the evening for the weakness of their ability to fall in the evening. Also, attention should be paid to uniform and fine spray in order to increase the control effect and reduce the spread of debris.
3, due to the large population density of tobacco borers, overlapping generations, should be sprayed 3 to 5 days after the drug once again. And pay attention to alternate medication and rational compounding to avoid drug resistance.
4. The whitefly on the body and wings of Bemisia tabaci may be added with a small amount of neutral laundry detergent (concentration not more than 0.05%) in the prepared liquid to increase the insecticidal effect.
5, pay attention to the reasonable application of phosphorus, potash fertilizer, can promote the high yield and quality of crops, but also reduce the damage of whitefly.
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