2010 Cotton Farmers Overcome Adversely And Strengthen Management Is The Key To Cotton Production.

Especially this year cotton production from sowing to buds has not been affected by low temperature and rain for ten years. The cotton growth process is generally postponed for 7-10 days than usual. When the seedling situation is generally not as good as in previous years, how to make full use of the natural advantages according to the cotton growth characteristics, overcome the unfavourable factors, and strengthen the management of the flowering and boll period of cotton, is the decision.

Stable application of bud fertilizer, heavy application, early application of flower boll fertilizer, supplementation of top cover fertilizer, according to the survey, due to the influence of low temperature and rainy weather, some cotton stubble flowers in the Southern cotton region, so far, more than 1/3 cotton fields have not yet blooming and are still in bud stage.

For this kind of cotton field, the bud fertilizer should be applied in a timely manner. The average amount of fertilizer applied is 5-7.5 kg, 50 kg of phosphate fertilizer or 15-20 kg of diammonium phosphate, and 0.5-1 kg of boron fertilizer and zinc fertilizer, respectively.

In the cotton fields that enter the flowering stage, they should apply early and apply the fertilizer to the flower and boll. The average amount of flower and bell fertilizer should be up to 20 kg of urea (high yield field can reach 30 kg) and potash fertilizer is 15-20 kg. When the amount of fertilizer is more, it can be used for two times.

Cover top fertilizer Southern generally in the first half of August to catch up, the north in late July and early August, top cover fertilizer should not be too late, especially Guoxin cotton disease resistance not premature decay, strong later, not suitable for more, late application, in order to prevent greedy late maturity.

Before the boll opening.

After topping, 2% of the urea solution or diammonium phosphate and compound fertilizer leaching solution were applied to the cotton field to carry out the root dressing, once every 7 days, and repeated three times, which had the effect of preventing premature senescence.

In line with local conditions, chemical control should be carried out and chemical control should be carried out to reduce the cotton plant type and control plant height. It can also adjust the nutrient distribution of cotton plants, prevent the growth of roots, promote root development, and improve disease resistance and insect resistance.

In order to prevent excessive production, we should adopt a small number of principles in accordance with local conditions. The average amount of acre should be 0.3-0.5 grams in bud stage, 1-2 grams in the first blooming period, 3-4 grams in the flowering bell period, and 5-6 grams in 7 days after topping.

Through chemical control, the plant height of cotton at flowering stage is controlled by 80-90 centimeters in the South and 130 centimeters after topping. The cotton area in the north is controlled by about one meter.

There are more rain in the south. We should do well drainage works in the field, dredge four gullies, prevent the occurrence of waterlogging and waterlogging, and combine the cultivation of soil and ditch to make Xiang Gou, pverse trench, trench, main draining ditch, ditch and ditch communicated. The depth reaches 20, 30, 50, and 80 centimeters respectively, so as to realize drainage freely and quickly.

The North combines with the middle tillage to make up the soil, so as to achieve waterlogging and drainage.

Fine pruning, timely topping and fine pruning are a traditional technology for increasing yield and stable yield of cotton, and should continue to be used and improved.

Generally speaking, the south is not suitable for pruning and simplifying pruning cultivation.

The topping time is generally suitable before and after autumn. There are about 22 fruit branches per plant. For late pplanting cotton fields, early maturing can be done to prevent late maturing. The topping time in the northern cotton area is better than before July 20th, leaving 14-16 branches.

For the cotton fields with pruning branches and free pruning branches, shoot branches should be destroyed when 2-3 secondary leaf branches grow.

Do well

The main pests are whitefly, Spodoptera exigua, and small bridge worms.

The main occurrence period of whitefly is in August and September. It should be controlled and ruled in the early stage. The effective agents are pyridamidum, wettable powder, biphenyl pyrethroid, avermectin and so on.

The outbreak period of beet armyworm and erecting caterpillar is in the middle and late 8 months. The main drugs for prevention and control are methavin salt, abalone, abamectin and so on. We should seize the critical period before the age of 3 by monitoring and reporting.

Prevention and control of Fusarium wilt should be based on popularizing resistant varieties, and three times of new Kwong Huang plus foliar fertilizer can be used in late growth stage.