Cotton Planting Knowledge (Two) Cotton Seed Treatment

< p > 1. Drying.

< a href= "http://www.91se91.com/news/" > sun dried seeds > /a > can kill germs, enhance disease resistance, break cotton seed dormancy, increase germination rate, and can germinate for 1 days ~2 days earlier.

Sun drying is usually carried out about 20 days before seeding.

Methods: choose fine cotton seeds to spread on the mat or soil field (spread 3 cm ~5 cm) for 4 days ~5 days.

Turn ~5 3 times a day until you can ring with your hand.

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Seeds soaking in hot-water soaking and hot-water Decoction (P > two) can kill pathogens that are attached to seeds and hide inside the seeds, and accelerate germination. They also remove immature seeds and kill pests on seeds.

(mainly cotton pink bollworm) and so on.

Methods: put the warm boiled water of three opening and cooling 60 degrees ~65 C into the cylinder and put in the cotton seeds selected for sun drying. The ratio of water and seeds is stirring, and after soaking for 30 minutes, the fish can be dried and dried until the seeds are light white.

In order to ensure that the cotton seeds in the cylinder are uniformly heated up and down, the soaking process is separated by 10.

The minutes should be mixed up and down.

After soaking and sprouting slightly after hot soaking, the mixture of 3 dry cotton seeds and 1 carbofuran granules before seed soaking can be used to sow the seeds effectively, which will effectively control aphid damage at seedling stage.

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This method can effectively prevent the occurrence of Wilt and Verticillium Wilt and seedling diseases, especially when the seeds imported from abroad are treated by this method, and the sterilization effect is 100%. < p > three, sulfuric acid develvet + 402 decoction.

Methods: (1)

Take 1000 ml of industrial sulphuric acid with a specific gravity of 1? 8, and then heat it up to 110 ~115 C and pour it into a ceramic vessel with 7? 5 kg of cotton seed. Stir quickly until all the lint on the cottonseed is completely stripped (stirring time is about 1 minutes).

~2 minutes), immediately wash with water, wash and stir, wash until the water is colorless, taste is not sour, and then dry the seeds aside.

(2) one day before planting, take 18? 75 kg of warm boiled water with 60 degrees Celsius, plus 80%

The antibacterial agent 402 was mixed into 2000 times seed soaking solution, adding 7 to 5 kg, and then treated with sulfuric acid to remove the cotton seeds. The seeds were dried for 30 minutes and then dried for a little bit.

The mixture should be mixed up and down for 10 minutes during the soaking process.

And keep the soaking temperature at 55 ~6 0 C.

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Seed Soaking with P > four, < a href= "http://www.91se91.com/news/index_c.asp" > carbendazim < /a > gel has good control effect on cotton anthracnose and Damping off, and also has a certain effect on controlling cotton withering and Verticillium wilt.

Methods: 40% carbendazim gel suspension 0? 7 kg.

Soak 50 kg of water in 100 kg and soak for 14 hours.

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< p > five, soaking seeds with shortening of diamine and soaking seeds and shortening can significantly improve the seedling quality of cotton, and increase branches and buds. This method is especially suitable for soaking seeds in summer cotton.

Methods: one day before planting,

The selected cotton seeds were placed in the soaking solution containing 100ppm~200ppm of the effective fraction of PIM, and soaked for 8 hours at room temperature for ~12 hours.

Without the addition of DPC, the effect of CG is similar to that of DPC.

However, it is worth noting that no matter whether the seed can be soaked with either diamine or strong hormone, the concentration ratio of seed soaking must be strictly controlled.

Do not increase the dosage at will.

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< p > six, carbendazim seed dressing carbendazim is an internal bactericide, which can control cotton yellow, Fusarium Wilt and seedling diseases.

The method is to use carbendazim powder 0 to 5 kilograms per 100 kilograms of cotton seed or 25%

Carbendazim WP 2 kg seed dressing has good effect on the control of Damping off and anthrax.

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< p > seven, "802" < a href= "http://www.91se91.com" > seed dressing < /a > before planting cotton, use 802-3000 times liquid plus cotton seed weight 60% of the liquid, stirring at the side of the spray, until the spray is finished, 4 hours after ~6 hours.

Or add other fungicidal drugs) to sow.

According to the experiment, 802 cotton seeds were used for seed dressing.

The average lateral root number of the first time was 5? 85 more than that of the control. The average dry matter weight per plant in the 5 leaf stage was 4? 05% higher than that in the control.

It can also be soaked in seeds, soaked in cottonseed for 802-3000 hours and soaked for 6 hours for ~10 hours. After filtering out the excess liquid, seeds can be sown or mixed with other fungicidal drugs.

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< p > eight, rice foot green seeds are usually mixed with 25% rice foot green wettable powder 0? 5 kg and 10 kg of semi dry semi wet soil plus grass ash mixed evenly, and then mixed with cotton seeds.

100 kg, now mixed.

It can also be seeded with 0-5% rice and green seeds for half a month.

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