Detailed Introduction Of Different Control Techniques For Cotton

< p > chemical control agents are currently more, and the correct use of different agents should be taken according to different agents so as to achieve better results. < /p >
< p > 1, shortening of amine.
At present, the application of DPC in the < a href= "http://cailiao.sjfzxm.com/Matertial/show/default.aspx" > cotton control /a > is more extensive and the effect is ideal. It can reduce cotton plant height, reduce the number of fruit branches, promote photosynthesis to reproductive growth, reduce boll abscission, increase boll number, and coordinate the contradiction between individual development and population development. Cotton can be used for 4 times in a lifetime, and the first use is in bud stage, and 0.51 grams in water for 20 kg.
The second time in the first blooming period, the Mu uses 1.51 grams to the water 30 kilograms, may prevent the prosperous to increase the bell. In the third flowering and boll stage, 34 grams of water were added to 30 kg, and the top of the sprayed plant crown and fruit node was mainly focused on shaping the good plant type. The fourth time in the later period, if there is "running high" phenomenon, it can be recontrolled, and the Mu will be covered with 34 grams, so as to control the late bud, shorten the upper fruit section, and prevent the no effect section increasing, and the buds are clustered. < /p >
< p > two. During the buds and early blooming periods, 25% kg 5 ml of water was added to 40 kg per mu, and 10 milliliters were sprayed once at full bloom stage, which could effectively control the growth of cotton, reduce the abscission of bolls and Bolls and the occurrence of Boll disease. < /p >
< p > three, chitin. It can be used in the whole growth period of cotton. 600 to 800 times liquid spray can enhance the resistance and disease resistance of cotton, especially for cotton seedling diseases, Verticillium Wilt and Fusarium wilt. < /p >
< p > four, thirty alkanols. Soaking seeds for 8 hours with 0.1 mg / kg thirty alkanols can increase the germination potential and germination rate of seeds. Spraying 0.1 mg / kg thirty alkanols at the end of flowering and flowering stages can reduce the abscission of buds and bolls. < /p >
< p > five, ethephon. The cotton field with low yield and low yield per unit area is not suitable for spraying. After spraying for a few days, the temperature is higher than 20 degrees, and only 20 degrees above the temperature can decompose and release ethylene. The boll period of the upper cotton boll is more than 40 days. The North Cotton Area is suitable for spraying 20 days before the arrival of the dry frost period. Generally, 40% ethephon water is used for 300 days - 800 times liquid 60 kilograms per acre, and ethephon is used to ripening. It must be noted that the spraying liquid is directly attached to the bell body, so as to minimize the interception of the leaves, and not mix with the basic pesticide. When using 0.2% neutral detergent powder as wetting agent, the effect is better, and the seed field can not be used. Ethephon is mainly used in all kinds of late maturing cotton fields and cotton fields with early stubble stubble. < /p >
< p > < a > href= > http://www.91se91.com > cotton seedling protecting agent < /a > usage > /p >
< p > 1. The use of cotton seedling protecting agent is composed of big, medium and small bags. The seed soaking steps are as follows: 1. Use 5 kg of cotton seeds for three minutes (70 degrees Celsius), soak in a cool water for 5 minutes, remove cotton seeds and squeeze excess water. 2. Dissolve the sachet reagent in 0.5 kg of clear water and pour into three cool water soaked cotton. Stir it down and stir it for 24 hours (stirring 2~3 times in the middle). 3. Dissolve the Chinese bag reagent in 1.54 kg of water, pour it into the cotton seed soaked in the bag, and stir it for 24 hours. 4. Dissolve the big bag reagent in 1.5 kg of water and pour it into the cotton seed soaked in the medium bag reagent, and stir it for 24 hours. After treatment, seeds can be sowed or planted in a wet bag for germination. The sowing time of each sack can be shortened to 12 hours when the sowing merchant is sowing. Or soak 10 kg of cotton seeds in three open and cool water for 12 hours, remove and control the water, dissolve the large, medium and small bags of reagents with 2 kg of water, and then pour into the cool water soaked cotton seeds for three hours, stir well for 12 hours, and then accelerate germination and sowing. < /p >
< p > two, precautions 1, cotton seedling treatment set < a href= "http://www.91se91.com/news/" > cotton seed > /a > process is the process of cotton seed resistance training. It is to allow cotton seeds to fully absorb the reagent into cotton seeds, so as to reduce the invasion of soil salt ions and germs and enhance the ability of cotton seedlings to resist stress. The shorter soaking time or one seed soaking is better than that of seed soaking for 24 hours at a time. 2. When the cotton seeds are degenerated by sulfuric acid or need to be sowed, they can not be soaked in seeds for three times or directly. However, three bags of reagent and water were 1.8 kg, soaking 6 kg, the other steps were the same. 3. When cotton seedling protection agent is used and insect pest insecticides are used at the same time, after the seeds are used for three times, the pesticide will be mixed before planting. 4. After soaking seeds with cotton seedling protection agent, if the cotton seeds are not moist enough to sow seeds, they can be slightly breezy for a while or for a while, but do not let the seeds lose too much water, otherwise they will affect the effect. 5. When the seeds are dry, the seeds will lose water quickly, and the seeds can be covered with damp cloth. If the temperature is high (the average daily temperature is above 20 degrees Celsius), the time of seed soaking can be shortened, so as to avoid the seeds sprouting longer and affect the seeding. < /p >