In recent years, more and more farmers have used coated and refined cotton varieties in the majority of cotton areas. The area of ​​application of coated cotton varieties has been continuously expanding, and the share of some cotton-covered township-covered cotton species has reached almost 100%. Coated cotton species have many advantages such as provincial species, early-onset, high emergence rate, and strong resistance to stress and are welcomed by the majority of farmers.
However, in the process of transplanting cotton seedlings, there is also a common problem, that is, some local farmers or some farmers also use coated cotton seeds. The emergence rate of cotton is as high as 90%, but the rate of seedling emergence is not limited. Not ideal, some only reach about 70%. From the investigation's reasons, first, some farmers have misunderstood the understanding of the coated cotton seeds, and think that with the coated cotton seeds, the seedbed can no longer be disinfected and prevented from disease, and the mind is paralyzed; second, some cotton seeds are sown on the back cover. The soil is too shallow, and the cotton emerges with shells. The weak seedlings die quickly in the event of drought or rain. Third, the nutrition is too thin, the gaps between the two sides are not filled with soil, the cotton seedlings lose water quickly, and some seedlings are easy to die; Fourth, improper control of temperature and humidity in the seedbed membrane, but also easy to die. Comprehensive analysis, one type of disease dead seedlings, the other belongs to physiological dead seedlings.
In order to better improve the seedling emergence rate and cotton seedling quality of the coated cotton seedlings, it is necessary to strictly adopt the corresponding prevention and matching technologies in the management of seedlings and nursery beds for nutrition.
In order to completely prevent cotton seedling disease from infecting cotton seedlings, the most common diseases are blight, anthrax, both keratodermatosis, and wing-wing spot disease. Their main transmission methods are: cotton seed, bacteria in soil, and tool carrier for seedlings. Therefore, in addition to the treatment of cotton seed, it is necessary to disinfect bauxite, cover soil, arches, and old agricultural films. Generally, it is sprayed with carbendazim to disinfect, its concentration is 1:200 times, and it can also be disinfected with thiophanate-methyl, etc., all can receive good preventive effect.
In order to put a good cover on the soil, we must put it into a plum shape, and the quilted joints should be filled with fine soil. Cotton seeds should be covered with fine soil or sandy soil in time after sowing, with a thickness of about 1 cm.
After the two cotyledons of the cotton seedlings are protected from flattening, the young stems are most likely to suffer disease because they are not yet lignified. In order to prevent the infection of bacteria, Bordeaux must be sprayed to protect cotton seedlings in time. Its preparation is: 1 kg of copper sulfate, 0.5 kg of quick lime, 50 kg of each solution of clear water, and then mixed and stirred. Can also be sprayed with 0.1% ~ 0.2% of triazole copper (triadimefon) solution, the effect is also very significant.
To control the seedbed temperature under high temperature and rainy conditions, even if the cotton seedlings grow neatly, wire seedlings are prone to occur, resulting in decreased quality and reduced resistance. If the regulation is not timely cotton seedlings will feel sick. Therefore, to promote short-bed nursery, the length of the seedbed should be 10 meters, in order to ensure the stable growth of cotton seedlings.
For this reason, comprehensive precautions should be taken in all areas where fine cotton seedlings are used for seedling development in order to better play the anti-disaster function of the refined cotton seed.
Medical Device Cover,Disposable Medical Devices Covers,Medical Devices Covers,C Arm Cover
Suzhou JaneE Medical Technology Co., Ltd. , https://www.janeemedical.com