Recent emergency management measures for cotton
The light and heat conditions in the early part of this year are favorable for the growth of cotton, but the recent low temperature and light, overcast and rainy weather are extremely disadvantageous to the growth of cotton, and the shedding of buds and bolls increases obviously. At present, it is a critical period for the formation of cotton yield. in order to seize high cotton yield, the following management measures should be strengthened:
1. Supplementary application of top fertilizer and foliar spraying fertilizer for cotton fields with more bolls and premature senescence fields, urea 5-7.5 kg per 667 square meters, foliar spraying fertilizer can also be combined with insect control.
2. Rational pruning and chemical control due to the recent high number of Rain Water, which caused poor ventilation and light transmission in the cotton field, it is necessary to push plants and ridges. At the same time, 98% of thalidomide is used for every 667 square meters in Wangchang cotton fields, 98% 1-2 grams per 667 square meters in robust cotton fields, and 0.5-1.0 grams per 667 square meters in poor cotton fields, which is best carried out after fertilization and before irrigation.
Third, integrated pest control to strengthen the control of cotton bollworm, blind Toona sinensis, whitefly, etc., pyrethroids, organophosphorus and other pesticides can be used alternately, and pay attention to the protection of natural enemies, usually after 5 o'clock in the afternoon. For Fusarium wilt and Verticillium wilt, prevention should be given priority to. At the initial stage of the disease, 500 times 25% of the drug solution can be used to irrigate the roots, 50-100 ml per diseased plant, and the more severe fields can be reperfused at intervals of 5-7 days. at the same time, 0.2% potassium dihydrogen phosphate solution plus 1% urea solution was used for foliar spraying every 5-7 days for 2-3 times.
- Prev
Jiuza No.4 (cotton)
Jiuza No.4, a new hybrid cotton combination successfully cultivated by Jiucheng Institute of Agricultural Science in Anhui Province for 8 years, passed the examination and approval of crop variety examination and approval committee of Anhui Province on January 11. Experts believe that this variety has good high yield, stress resistance and fiber quality, and is a new combination with high yield potential among Anhui cotton new varieties. Anhui Jiucheng Agricultural Science Institute began the breeding work of "Jiuza No.4" in 1994. the parent of that variety are purified by a self-cross hybrid propagation method, and the new combination is selecte by a cross breeding method
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Jinnan District Agriculture and Forestry Bureau reminds cotton farmers to master the management techniques of cotton flowering and boll stage.
The flowering and boll period of cotton in Tianjin generally begins in early July and ends at the end of August, which lasts 55 days. According to the survey, most of the cotton fields in our district have entered the flowering and boll stage. The field management of flower and boll stage is very important, which is the most exuberant period of cotton growth and development, a period of complex contradictions between vegetative growth and reproductive growth, individuals and groups, cotton crops and environment, so it is a period to determine yield. The cotton field management in this period should pay attention to the following key aspects: 1. Increase the application of potash fertilizer.
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