According to the recent survey of cotton aphid base in Shanxi Province, combined with weather forecast and historical data, the Shanxi provincial crop pest and disease monitoring station has been comprehensively analyzed. It is estimated that cotton aphid will occur in the main cotton producing counties of Yongji, Ruicheng, Linyi, Saline Lake and Wanrong this year.

The peak of damage was in mid July.

The area is 1 million mu.

The occurrence of cotton aphid in this province is heavy and local occurs this year. The highest percentage of rolled leaf plants in cotton fields is 35% to 83%, which is higher than that of last year.

According to the cotton census results before and after June 30th, the number of aphid is significantly higher than that of the same period last year, most of which are the highest in recent years.

According to the forecast of the Provincial Meteorological Observatory, the rainfall in Yuncheng and Linfen, the main cotton producing areas in July, is 1~2 less than that in the same period of the year. The average temperature is about 1 degrees higher than that in the same period of the same year. According to the forecast of Yuncheng meteorological Observatory, Yuncheng has 23~25 to 23~25 rainy days.

Climatic conditions are favorable for cotton aphid.

In terms of ecological conditions, according to recent surveys in Yongji and Ruicheng, there are few natural enemies in cotton fields, and the ratio of damage to damage is 1: 20733~1: 4425, which is difficult to control aphids.

In addition, cotton grows well in the province and provides good environmental conditions for the growth and reproduction of Aphis gossypii.

Prevention and control suggestion: strictly control the control index. Control measures should be carried out immediately when the number of three aphids is over 10000 or the rate of oil flow reaches 10%.

Imidacloprid, ad, zimijing, acetamiprid can be used as control agents.