How to Avoid Dead Cotton Seedlings

The so-called coated cotton seed is a product obtained by removing the fine cotton seed with dilute sulfuric acid and then coating the seed with a seed coating agent containing bactericidal drugs and regulators. According to our annual surveys among some farmers in cotton areas, some cotton seedlings have indeed appeared dead seedlings. Most of them are dead seedlings that cause blight disease, and they also have other diseases and management errors.

The main reason is that good varieties are not well used in good varieties. The specific performance is as follows:

First, after the cotton was sown in the nutrient bowl seedbed, the top soil of the pot soil and the cover cotton seed was not sprayed and disinfected;

Second, the cotton seeds were irrigated too much after sowing, and some repeated watering caused rotten seeds;

The third is the excessive application of base fertilizers, excessive soil liquid concentration, reverse osmosis injury seedlings, or the application of urea as base fertilizer to make cotton seeds lose water and rotten seeds, which is often referred to as fertilizer damage;

Fourth, too shallow or too deep cotton seeding will inhibit the normal growth and development of cotton seedlings, resulting in dead seedlings;

Fifth, the cotton seedlings were not sprayed with pesticides in time to prevent the invasion and protection of the cotton seedlings after the cotton seedlings appeared, or the cotton seedlings were burned to death due to excessive application of pesticides, causing drug damage;

Sixth, the plastic film was uncovered too early or the film was retracted too early, so that the young cotton seedlings became dead because of freezing damage.

In summary, in order to play the role of finely processed coated cotton seeds, we must first understand the coated cotton seeds, and then grasp the supporting application technical measures.

First, we must understand the role of coated cotton seeds. After the cottonseeds are coated with foamed acid, they have killed the bacteria attached to the cottonseeds and enhanced the cottonseeds' disease resistance, which has a significant advantage over uncoated cottonseeds. However, the disease resistance of coated cotton seeds has certain limitations, not a big bag. Soil and externally transmitted germs must also be controlled to ensure the early onset of cotton seedlings.

Second, we must grasp supporting application technologies. The first is to increase the application of rotten organic fertilizers, to avoid partial nitrogen application to promote seedling growth and weaken cotton seedlings; the second is to match the nutrient bowl soil of cotton seedbeds, supplement phosphorus and potassium fertilizers as appropriate. It is necessary to ripen the pot soil to protect the water and filter the water and prevent rotten roots and dead seedlings. The third is to spray pesticides on the pot soil and cotton seedlings. One can use 10% 2.5% Shiloh seed coating agent and 10 kg water spray bed. Soil, two can use 12.5% ​​green fen, plus Baoliang (0.01% lacton lactone) solution to disinfect and protect the seedlings, three can use semi-volume Bordeaux liquid spray seedlings, four can use 30% xanthomone water agent 1000-1500 times liquid spray Apply or irrigate.

The third is to alleviate the growth of cotton seedlings by relieving dead seedlings. For cotton seedlings that are stiff and stagnant due to phytotoxicity and fertilizer damage, one can use Huimanfeng or Zhuangfuxing active liquid fertilizer, 100 ml per acre, and spray with 60 kg of water; the second can use 0.01% Baoliang ) Or Tianfengsu spraying; three available Bi Hu wettable powder, spraying 3 grams per acre with 50 kg of water spray, can alleviate the "two harms" and restore the normal growth of cotton seedlings.

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