In recent years, there has been a saying among some cotton farmers: "The wolfberry is planted on the ridge, and then the cotton tube is used; if it is not right, buy a dichlorvos." In fact, the management of cotton in the timely treatment of the disease, in order to receive the effect of cost-effective macro. First, control cotton aphids and cure red spider. When the locust damages about 10% of the plants, or 3% of leaf-rolled plants, it should be controlled in time to spray the back of the leaves and tender tips. The effective pharmaceuticals are: 50% of 50% multi-fruited emulsifiable oil 50-100 ml, or 25% of 30-50 ml of multi-killing chrysanthemum emulsifiable concentrate, or 50-80 ml of 40% aqueous methionin emulsifiable concentrate, all alternated with 50-60 kg of water. use. Second, the prevention and treatment of red bollworm and cotton aphid and spider mites. The long-term harmful period of the red bollworm can be harmed from budding to ripening. Therefore, it should be sprayed before budding prevention, in the middle and late should focus on prevention and treatment. The effective medicines are: 20% of the mu with 30-40 ml of swizzling emulsion, or 20% of fast killing of 30-40 ml of diced cream, or 50% of 80-120 ml of methamidophos, or Nisolon (50 %) 50-70 ml, alternately 50-60 kg of water. Third, control red spider. The insects are the main pests during the flowering period. The selected pesticides include: 120-130 ml of 20% chloroctam-alcohol for acre, 60-80 ml of water-containing phosphorothiocyanate, 300-500 g of motor oil emulsion, or 300 g of crystalline lime sulfur. Content: 40%) 500g, both use 50-60kg alternately. Fourth, prevention and treatment of cotton stem blight cure cotton anthrax, brown spot, ring disease, angular spot and blight. These diseases are mainly endangered in the early flowering period. Therefore, we should grasp the rapid cure early to control the spread. To choose the Bordeaux mixture 1:1:200 (copper sulfate: lime: water) to control the special effects, or use Baume 0.3-0.5 degrees of lime sulfur agent and Zexane 1∶500 times better control effect. In addition, there is a lot of rain in summer, and rice fields tend to become tight (in the field production, many cotton growers are mostly plateaus when they plant cotton, especially wheat fields planted after large and wheat are harvested), while shallow-medium cultivation of cotton fields can significantly reduce cotton withering. Diseases, anthrax and Other physiological diseases occur. After a moderate to heavy rain, a cotton field cultivator will help grow cotton and reduce disease by more than 10%. Source: Sichuan Nongxun Daily
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