Recently, a farmer in Shuqiao Village, Wuluo Township, Yunmeng County, Hubei Province telephoned and asked about the problems of cotton medicine. The two issues that farmers care about in cotton seedling cultivation are discussed.
One is whether the soil of the coated seedling nursery bed is still to be sterilized. Nowadays, most of the seeds used in cotton production in China are cotton seed that is treated with foaming acid and depilated and then coated with a coating agent. It is abbreviated as coated cotton seed. The drug in the coating agent can kill pathogens attached to cottonseed. However, soil-borne pathogens of various soil-borne pathogens have to be sterilized or killed by fungicides. If this link is neglected, cotton seedlings that are very well developed may be infected with blight, anthrax, and stem blight. During the period of disease, therefore, when the entire cotton seedling bed is used, the soil of the seedbed should still be applied to prevent disease. There are many pesticides that can be used, such as 25% carbendazim 1200 to 1500 times, 2.5% Shiloh 500 times liquid agent, 25% Xinxiu (propiconazole) EC 5ml, 60% Baitai water dispersible granules 8g respectively against the clean water 30kg, before spraying, the seedbed soil is sprayed to make the liquid solution. All the soil penetrated. After the cotton seedlings are flushed, they must be sprayed in time to prevent the invasion of foreign germs. Sprayable drugs such as 1:2:200 Bordeaux fluid or 0.01% moisture-proof and so on.
Second, can we use herbicides on cotton seedlings? Cotton nursery seedlings often suffer from grass damage. Sometimes weeds can also cause grass seedlings and severely inhibit the growth and development of cotton seedlings. Severe grassland on seedbeds is often caused by two reasons. One is the new site selection seedbed, too late to plow tillage soil, the weeds have not been winter ling, spring sun, limping net, leaving the residual weeds breeding; Second, the application Fertilizers from the farmhouse were applied with fertilizers that were not completely decomposed and the seeds of weeds were brought into the seedbeds for rapid propagation. Therefore, to apply herbicides before emergence after cotton sowing, one can use 48% puller EC per mu 150 to 200 ml, or 72% Dole EC 150 ml per mu, respectively against the water 60 to 80 kg spray, two It can be used 23% of bed grass net emulsion, 100-120 ml per acre and 80 kg of water spray, which can effectively prevent the damage of weeds.