Prevention of Cotton Fuxi

The locusts are divided into seedlings and cultivars, which are two ecotypes of cotton aphid that adapt to different environmental conditions under different environmental conditions. It mainly concentrates on the back of the cotton leaf or sucks juice. The volcanism in the cotton fields of the Yellow River Basin mainly occurs from mid-July to mid-August, which can cause the upper young leaves of cotton to shrink and the leaves in the middle leaves to appear oil leaves. Most of the cotton had been ridged and the leaves were dense because of the occurrence of Fuxi. Therefore, many farmers reported that the Fuxi was harder to prevent and cure than the Miao.

First, what happened

At present, the occurrence of cotton volt is widespread in Hengshui City, and some of the land blocks are heavier. In Wuyi County, there are 3,000 to 5,000 Crested Clover cultivars, with a maximum of more than 20,000 heads. The severed leaves have been curled; the highest block in Gucheng City has more than 10,000 heads of clover and more than 10,000 heads, and the rate of leaf rolling is 36. %. The meteorological department predicts that the city will still maintain high-temperature weather in July, and the precipitation will be close to normal. The high temperature and hot weather will help the occurrence of cotton volts. In this regard, we would like to remind our farmers and friends to strengthen field observations, prevent and control scientific medicine, and minimize production losses caused by cottonseed meal. The method of chemical control of cottonseed field is provided as follows:

Second, control methods

1. Rotate using medicines. The use of acetamiprid, imidacloprid, chlorpyrifos, etc., in the field, can be used interchangeably to reduce the possibility of drug resistance in locusts. Once maggots become resistant to a certain chemical, even if the number of drugs is increased, the concentration of the drug will increase. To achieve the desired control effect.

2. Spray thoroughly through the area where it occurred. Now cotton is in the flowering stage, the plants are tall, must be careful when spraying, with emphasis on spraying the back of the middle and lower leaves of cotton, to prevent leakage, leakage, and effectively guarantee the quality of each spraying. Because the locust breeding speed is fast, if there is a lot of insects in a single blast, it will increase the difficulty of the next control. Generally, the amount of liquid used per mu is between 50 and 60 kg.

3. Advocate the selection of some new drugs. For the conventional use of acetamiprid, imidacloprid and other traditional agents, the control effect is not obvious, you can use 10% nitenpyrazine aqueous solution, 20% butylthiocarbacar EC or 10% chlorothiophene and other new agents to control. Generally 10% chlorothiazide wettable powder 20 grams per mu or 10% nitenpyrazine solution 20 ml per mu.

4. The medication time should be appropriate. During the high temperature period, avoid the noon time and try to use drugs in the morning and evening as early as possible before 10 o'clock in the morning and after 4 o'clock in the afternoon. On the one hand, it can ensure personal safety; on the other hand, it can avoid the rapid evaporation of liquid medicine to dissipate heat and reduce drug consumption. effect.

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