Hot and humid days to check cotton bells
At present, cotton is in the flowering and bolling stage and immediately enters the boll opening stage. It is the flourishing period of cotton reproductive growth, and it is the key period for the growth and yield formation of nectarine, and it is also a critical period for the prevention and treatment of rotten bells. In late July this year to early August, the rainfall was abnormally higher than normal, and rotten bells were more likely to occur. Symptoms of diseased peaches are blackish and immersed in water. They are long and sparsely white, erect, hyphae, and do not crack. They are stiff peaches. Cotton bolls in the lower part of the cotton plant are vulnerable to light, poor ventilation, high humidity, and are immersed in rain or insect bites, and are easily infested by germs. The main factor in the occurrence of this year's rotten bells is rain. After a field survey, the rotten bell was found on August 5, 3 to 5 days earlier than the previous year, and the diseased plant rate was 5 to 15%. Control methods: The first is air and light transmission. Pruning in time to pruning, to group tip, push the strain and ridge. In the early stage of the disease, old leaves should be promptly picked, empty fruit branches and leaf branches should be removed, and empty plants should be removed to improve ventilation and light conditions among cotton plants, reduce field humidity, and reduce the occurrence of bell disease. The second is to reduce the humidity of the water. On the basis of leveling the land, eradicating weeds, and supporting irrigation and drainage, timely ditching and soil cultivation are conducive to the rapid discharge of accumulated water, reducing the water content in the field, and timely cultivating and spreading. The third is to reduce the source of bacteria. Timely removal of rotten fruit, brought out of the field. The fourth is timely pest control. Control three or four generations of cotton bollworm to prevent insect bite wounds and reduce the chance of infection. Fifth, chemical control. In the early stage of the disease, 50% thiophanate-methyl 1000-fold, or 75% chlorothalonil wettable powder 600-fold, or 50% carbendazim WP 500-fold per acre is used to align the lower middle bolls spray. Home Care Devices,Household Standby Medical Devices,Home Medical Equipment,Home Medical Services Surgimed Medical Supplies Co.,Ltd , https://www.surgimedcn.com