How to Effectively Control Cotton Spiders in Cotton Field

Cotton spider mites are one of the pests that harm cotton. If spider mite pests occur in the cotton fields, lighter crops can reduce cotton production, and heavy crops can even cause cotton crops to fail. Therefore, doing a good job of prevention and control of spider mites in cotton fields is an important measure to ensure stable production and high yield of cotton. Now I will introduce six measures that can be taken to prevent spider mites in the cotton field: 1. Do a cotton field survey. June is a high-risk period of spider mites in cotton fields. Generally, the cotton field survey is conducted five times a day. Each of the cotton fields is fixed in 50 plants. The upper, middle and lower leaves of cotton plants are checked and the number of insects per plant is calculated. Prevention and forecast. 2. Rational fertilization and irrigation to prevent the occurrence of red spiders. 3. Keep the field clean. Red spiders generally parasitize weeds and migrate to cotton when the temperature and humidity are appropriate. Therefore, field weeds must be removed. The protection zone around the cotton field is blocked every week with monocrotophos or dicofol to reduce the population base. 4. Spot control. Once the red spider has developed in the cotton field, immediately block the perimeter of the cotton field and prevent machinery from entering. Be careful not to walk around when watering. It is necessary for designated personnel to control the cotton fields in the form of dots and pieces, and other personnel must not enter without authorization to prevent red spiders from entering other cotton fields. 5. The prevention and treatment methods of routine “checking, inserting, wiping, picking, painting, pulling and playing” can be adopted. Here I will elaborate on these seven methods. "Check": It is to determine the prevention and control method according to the investigation situation. Generally, the investigation is conducted 2 to 3 days. "Insert": It is the cotton plant that has been found to have spider mites that is clearly marked to facilitate control and observation; There are a few red spiders on the back of the leaves, gently wipe by hand; "pick", is to remove the leaves of insects, into the bag to bring out the field to bury; "coating" is to smear the stem or heart. Use omethoate or monocrotophos to prepare a 1:5 concentration solution. Attach a cotton ball to one end of the chopsticks, apply the liquid to the red-green border of the cotton plant, or use a plastic bottle to fill the infusion tube. Dropping the drug in the core of the cotton plant results in good results; “pulling out” means removing the cotton plant with a large number of insect bases and burying it outside the field; “fighting” means that the natural enemy cannot control or the spider mites in the cotton field When the tablet occurs, the use of chemical control methods to block the spread of pest control, you can use 20% dicofol EC 1000 times or 50% Apollo 5000 ~ 6000 times, 40% omethoate 1000 times, 5% Nissoline EC 2000 Times of liquid, 20% dying net emulsion 2000 times, 73% of Kodak special 2000 times liquid and other special acaricides, to completely eliminate the red spider. 6. Care must be taken not to spray broad-spectrum insecticides on a large area in order to avoid pest resistance.