We should pay attention to spraying cotton in adverse weather.
When spraying pesticides on cotton to control diseases and insect pests, it will often affect the spraying quality, reduce the control effect and even cause drug damage due to adverse weather. In view of this situation, the author in the production practice according to different weather changes, take the following measures to achieve a better control effect.
In windy and windy days, spraying cotton plants received unevenly, which affected the control effect. In view of this situation, pesticide varieties with strong internal absorption and permeability can be selected. When spraying, the spray head should be closer to the cotton plant to prevent the damage caused by the spray blown away by the wind. At the same time, people should walk in the wind and spray the medicine to prevent poisoning caused by the wind blowing into the respiratory tract.
When spraying to control diseases and insect pests in cloudy and rainy days, the liquid is easy to be washed away by Rain Water and affect the control effect. In view of this situation, quick-acting pesticide varieties with strong contact and quick knockdown can be selected, after rain or rain gap, appropriately increase the concentration of the liquid, reduce the amount of the liquid, spray quickly and evenly on the cotton plant, and use Rain Water on the cotton plant to dilute the pesticide, so that the cotton plant can receive medicine evenly, so as to improve the control effect.
On hot days, especially at noon in the hot sun, if you need to spray, do not choose pesticides that are easy to decompose (phoxim, etc.) or highly toxic pesticides. Pesticides with high efficiency, low toxicity and high efficiency can be selected. When spraying, it is necessary to appropriately reduce the concentration of the liquid and increase the amount of the liquid, so as to prevent the rapid evaporation of water in the hot sun and cause poisoning to the burnt leaves and personnel.
There are many dewdrops on the cotton leaves in the foggy open air, and the liquid is easy to drop with the dewdrops. In view of this situation, the spraying method of ultra-low dose with high concentration and fast speed can be adopted to make the liquid evenly drift to the cotton plant to dew and moisturize the medicine, saving energy and increasing efficiency. At the same time, people should be in the upper hand to prevent poisoning.
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Study on the efficiency of Cotton Light Table in different planting patterns
In order to further increase the cotton yield, it is difficult to increase the number of plants per unit area. In production, it is necessary to increase the density, improve the poor ventilation and light transmittance in the middle and lower part of the cotton population, and improve the light transmittance and photosynthetic efficiency in the middle and lower part of the cotton population. In this paper, through the study of cotton population photosynthetic efficiency and light transmittance of different planting patterns, in order to determine the reasonable cotton population structure in specific areas, and to provide a basis for high-yield and high-quality cotton cultivation. Materials and methods 1. The general situation of the test was conducted in 2002-2003.
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Boll protection cotton 410b (cotton)
Variety source: Baoling cotton 410B is another new variety of transgenic insect-resistant cotton bred by Monsanto and Daizi Cotton Company of the United States using modern high-tech biotechnology. Approval: approved by the Ministry of Agriculture for commercial production in 2001, it was approved by Anhui Province in the same year. It is one of the new varieties of transgenic seed-resistant cotton promoted in Anhui Province. Characteristics: boll cotton 410B is a mid-early maturing variety, with a growth period of about 123 days, a plant height of about 105 cm, a fruit branch raised above, a short fruit node, a delicate and compact plant type and a strong boll setting ability.
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