The so-called coated cotton seed is a product in which a fine cotton seed is removed from the short velvet by dilute sulfuric acid, and then coated with a seed coating agent containing a bactericidal drug and a regulator. According to our survey of some farmers in the cotton area all the year round, some cotton seedlings have also appeared dead seedlings, most of which are dead and dead seedlings, and have other diseases and management errors.
The main reason is that the good varieties are not well applied to the good law package, the specific performance is as follows:
First, after the cotton was sown in the nutrient seedbed, the topsoil of the bauxite and the cover cotton was not sprayed and disinfected;
Second, cotton seeds are often watered after sowing, and some watering repeatedly causes rotten seeds;
Third, the application of excessive base fertilizer, soil liquid concentration is too large, reverse osmosis injury occurs, or the use of urea as a base fertilizer to make cotton seeds lose water, this is commonly said fertilizer;
Fourth, the cotton planting depth is too shallow or too deep will inhibit the normal growth and development of cotton seedlings, resulting in dead seedlings;
Fifth, after the cotton seedlings are released, the pesticides are not sprayed in time to prevent the invasion of the cotton seedlings by the invading bacteria, or the application concentration is excessively burned to kill the cotton seedlings, causing phytotoxicity;
Sixth, prematurely uncovering the plastic film or prematurely withdrawing the film, so that the young cotton seedlings suffer from freezing damage into pieces.
In summary, in order to play a good role in the finishing of coated cotton, it is necessary to first understand the coated cotton, and then grasp the supporting application technology measures.
First of all, we must understand the role of coated cotton. After being defoamed and coated with foam acid, the cottonseed has already killed the pathogen attached to the cotton seed, which enhances the disease resistance of the cotton seed itself, and has a significant advantage over the uncoated cotton seed. However, the resistance of the coated cotton seed has certain limitations, not a pack. The germs transmitted by the soil and external forces must be controlled to ensure the early development of cotton seedlings.
Second, we must grasp the supporting application technology. First, it is necessary to increase the application of decomposed organic fertilizer, avoid partial application of nitrogen fertilizer to promote seedling growth, weaken cotton seedlings; second, we must match the nutrient soil of cotton seedbed, and make phosphorus and potassium fertilizer as appropriate. To mature the bauxite, it is beneficial to protect the water from the sputum and prevent the dead roots from smashing the seedlings; the third is to spray the pesticide on the bauxite and the cotton seedlings, one can use the seed coating agent of 2.5% for 10 ml, and the water spray for 10 kg. Soil, two can be used 12.5% ​​green fen, with sputum (0.01% bryostatin) solution disinfection seedlings, three available semi-quantity Bordeaux liquid spray seedlings, four available 30% carbaryl water agent 1000-1500 times liquid spray Apply or root.
The third is to alleviate the growth of cotton seedlings. For the cotton seedlings caused by phytotoxicity and fat damage, stagflation and stagnation of cotton seedlings, one can use Huimanfeng or Zhuangfuxing active liquid fertilizer, 100 ml per mu, 60 kg of water; two can use 0.01% sputum ) or Tianfengsu spray; three available Bi-protectable wettable powder, 3 grams per acre with 50 kg of water spray, can alleviate the "two harms" to restore the normal growth of cotton seedlings.
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