What pests and diseases need to be controlled in cotton planting in July?
What pests and diseases need to be controlled in cotton in July? Please introduce the control methods. The pests and diseases that need to be controlled in cotton in July are as follows for reference: 1. Cotton fusarium wilt and verticillium wilt: in the Lianghe and Caobuhu cotton areas, the average incidence rate is 10-25%, and in some fields it reaches as high as 50%. There is more heavy rain in July, and the sources of the pathogen are widespread, which favors the spread and damage of the disease. Control...
What pests and diseases need to be controlled in cotton in July? Please introduce the control methods.
The pests and diseases that need to be controlled in cotton in July are as follows for reference:
1. Cotton fusarium wilt and verticillium wilt: in the Lianghe and Caobuhu cotton areas, the average incidence rate is 10-25%, and in some fields it reaches as high as 50%. There is more heavy rain in July, and the sources of the pathogen are widespread, which favors the spread and damage of the disease. Control method: use 80-100 ml of pyrimidine nucleoside or 80-100 ml of Kuhuangjing per mu, mix with 100 jin of water, and spray evenly. For severely affected fields, apply continuous control 2-3 times.
2. Cotton aphids and red spider mites: due to the long-term high temperature, the occurrence will also be severe. In mid-July, some fields will show red leaves, and aphid damage will cause leaf curling and shrinking, seriously affecting the normal growth of cotton. Control methods: ① Use special acaricides such as Guangmanyi and Manwoduan to control red spider mites; ② Use Yashixiao, De, etc. to control aphids, with high efficiency.
3. Cotton bollworm: showing an upward trend, mainly damaging early-sown bolls and late-sown cotton seedlings and flowers. The control period is July 12-25, spraying once every 5 days. The main pesticides used are: Kenda, Qibajian, Dupin, Chongdi, Suoke, and also control leaf rollers and plant bugs, etc.
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