Control measures of Cotton Seedling Disease after Rain at Seedling stage
In the case of rainfall in cotton seedling stage, the disease is easy to break out and spread. Light pathogens infect the leaves, and the disease spots affect the photosynthesis of leaves, which leads to late occurrence of cotton seedlings, and serious ones lead to rotten buds and rotten roots, forming diseased or dead seedlings. Humic acid foliar fertilizer should be sprayed twice after cotton emergence to improve the low temperature resistance and disease resistance of cotton seedlings. Spraying 50% carbendazim or 70% methyl thiophanate wettable powder 800 times + 70% mancozeb 600 times, or spraying and irrigating roots with 3000 times of carbendazim, once every 7 days, twice in a row, combined with foliar fertilizer, the effect is better.
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Five measures for regrasping cotton at seedling stage
Cotton takes about one month from emergence to budding, which is a single vegetative growth stage, and it is an important growth period to promote root rooting, prevent seedling disease, promote early development, and then reach early budding. The field management of plastic film cotton mainly includes releasing seedlings in time, ploughing and loosening the soil, checking seedlings and replenishing seedlings, preventing diseases and pests, fixing seedlings, and so on. Cotton farmers everywhere have a lot of experience in cotton seedling management, which is worth popularizing, which is summarized as follows: early seedling release, late hole plugging. When 50% of the cotton seedlings are unearthed, the cotyledons can be released in batches when the cotyledons are flat and turn green. Release seedlings
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Matters needing attention in using Fungicides in Cotton Seedling stage
First, when choosing fungicides, it is necessary to find out the properties of fungicides. There are two types of fungicides, one is protective agent, this kind of fungicide is to prevent plant disease, such as Bordeaux solution, mancozeb, carbendazim, etc.; the other is therapeutic agent, which is applied after plant disease, in order to kill or inhibit the pathogens invading the plant, the therapeutic agent has a better effect in the early stage of the disease, such as Kangkuning, Baozhida and other compound fungicides. Second, fungicides should be sprayed before 9 am or after 4 pm. If sprayed in the hot sun, the chemical is easy to decompose and evaporate.
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