Cotton Pests And Diseases In Xinjiang In The First Half Year

First half of this year

The overall occurrence of pests and diseases is partial and partial. The total area in Xinjiang is 21 million 860 thousand acres, which is 12% higher than that in the same period last year.

The occurrence degree of cotton aphid and cotton spider mites was heavier than that of the same period last year, and the amount of insects was higher than that of the same period last year.

Up to now, Aphis gossypii occurred 4 million 340 thousand acres, and aphid has entered the last stage of damage. The southern region of Kashi, Akesu, Northern Xinjiang and Tacheng cotton area are relatively heavy.

Cotton spider mites are currently at the peak of damage, with an accumulative area of 3 million 400 thousand mu, and local damage is more serious in Tacheng, Kashi and Akesu cotton regions.

Bemisia tabaci occurs moderately in Turpan, with heavy weight in some areas. Some cotton fields have been contaminated by Bemisia tabaci exudates.

A generation of cotton bollworm occurred in cotton fields lightly. The occurrence area of maize, wheat and vegetable Tanaka in Hotan, Kashi, Akesu, Tacheng and other places occurred 3 million 20 thousand mu. The two generation larvae occurred in the cotton field. The area was 2 million 690 thousand mu. At present, the three generation larvae were in the infestation stage. The average number of insect pests in the cotton field was 2.4, and the highest was 12. In the Akesu Kuche County, Kashi Shufu County, Changji Manasi Prefecture and Tacheng Shawan County, the local cotton field was relatively high.

Cotton Verticillium wilt has been affected by continuous cultivation for many years, and the amount of soil borne bacteria has increased year by year, which is biased towards epidemic trend.

At present, cotton and other crops are in a critical period of production. Meteorological data show that from 8 to September,

In most areas, the temperature is relatively high, and the precipitation in the northern Xinjiang and the southern part of Xinjiang are slightly less. Especially in Hotan, Akesu and Bazhou in the south of Xinjiang, they are less frequent.

High temperature and drought weather conditions are more beneficial to corn borer, corn spider mites, double spot firefly, Helicoverpa armigera, spider mites and Bemisia tabaci.

According to the current crop growth, the occurrence of pests and diseases in early stage and the comprehensive analysis of insect pest base, it is estimated that the late generation three generation of cotton bollworm and other pests will be moderately damaged in the southern part of Xinjiang, and the area will be 1 million 500 thousand mu.

Cotton pests, such as cotton spider mites, Bemisia tabaci and Verticillium wilt, have entered the critical period of prevention and control. It is expected that the occurrence will occur at a moderate level in the latter stage, and the area will reach 3 million 600 thousand acres.

In view of the current corn and cotton production areas

In case of occurrence and trend prediction, the departments of agricultural and plant protection should promptly grasp the occurrence of local pests and diseases, clearly identify the distribution area, density of insect pests in the field, and focus on prevention and control of plots. Timely release of short-term forecast and prevention and control information will guide farmers to do scientific prevention and control so as to ensure the safe production of cotton and autumn crops.