Sparsely Not Leaking--Pest Control in Baoling Cotton Field

Bao Ling cotton is a high-tech product imported from the United States. Because it has the advantages of insect resistance, high yield, and high quality, it is very popular among cotton farmers. So, is it safe to use the boll-resistant insect-resistant cotton to control all pests? There are the following reasons. First of all, Bao Ling cotton is an insect-resistant cotton, rather than insectless cotton. The reason why it is resistant to insects is that it contains the insect-resistant gene, namely the Bt gene. The boll gene can produce toxins that are only toxic to larvae of lepidopteran pests such as cotton bollworm, red bell, cotton leafhopper, cotton bridge, diamond drill, corn borer, etc., and to cotton aphids and red spiders. Sisters, mongooses, elephant locusts, crickets and other pests have no control. Therefore, special attention should be paid to the control of these pests in the Bao Ling cotton fields. In addition, boll cotton can only kill below 3rd instar bollworm larvae and cannot kill older larvae. We know that the recipes of the bollworm larvae are very extensive. Except for cotton, soybeans, peanuts, corn and other crops and many field weeds are all foods that they like to eat, and it also has a certain ability to crawl and migrate. After the bollworm grows up on these hosts, it can climb to the neighboring Baoling cotton fields, causing certain damage to the boll cotton. Therefore, it is forbidden to intercrop cotton bollworms to eat crops. Finally, in some years, very few cotton bollworms can survive in cotton flowers and can grow up and cause certain damage. Although the number of bollworms in this area is usually very small, in the years when the bollworm is particularly large, special attention needs to be paid to monitoring in order to avoid losses. Here are the specific methods and measures for comprehensive prevention and control of pests in cotton fields. First, special attention should be paid to the monitoring and control of non-target pests such as cottonseeds and cotton spiders. First of all, cotton aphid: The control index of seedling mites is 20% when the leaf rolling rate is 20%. Fuxi: Randomly investigate the upper, middle, and lower leaves. When the cumulative amount of three leaves reaches 200, it should be immediately treated. You can use 50% of monocrotophos or 20% of good year of winter 1000 times, or 10% of wormworm WP 4000-6000 times spray. The control index of red spider mites is 6-12% of red leaves, and 20% of tanning oil can be used as 4000 times spray. Second, do not interplant peanuts, corn, soybeans, sesame, and other cotton bollworms in the middle of Baoling cotton fields. If the seedlings are not in good condition and need to be replanted, they must be replanted with boll cotton and must not be replanted. Non-Bt cotton varieties. By the same token, Bao Ling cotton cannot be preserved. Since the isolation measures of Daejeon cotton are not strictly controlled, many offspring will lose their resistance. Therefore, the loss caused by self-seeding is irretrievable. Please do not let the peasant friends have any luck. Never leave seeds of your own kind. In addition, timely weeding can also eliminate some of the bollworm host. Third, although Bao Ling cotton fields have performed well in most regions and years, some cotton bollworms may survive and cause damage in some years or regions where the cotton bollworms broke out. Therefore, remind Baoling cotton farmers to pay attention to planting boll cotton and strengthen bollworm field monitoring, especially after cotton blossom. When monitoring, special attention should be paid to checking whether there are insects in the flowers. If there are more eggs or newly hatched larvae like ants found in leaves, young shoots, etc., don't worry first. Wait a few days and these insects will die after eating the cotton leaves. Only when hunters of more than 20 2-3 instars, that is, 5-12 mm of cotton bollworm larvae, were found per 100 strains of cotton on that day, spraying control should be considered. A variety of conventional agents can be used to prevent and treat cotton bollworms. When spraying, they can be sprayed on buds, flowers, and bells. In field management, the pods adhering to the bell can be easily removed and taken out of the field for destruction.