Beware Of Outbreak Of Pests And Diseases In The Middle And Later Stages Of Cotton

< p > here, the world is < a target= "_blank" href= "//www.sjfzxm.com/" > clothing < /a > a target= "_blank" href= "_blank".

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< p > recently, the reporter learned from the center for disease and pest prediction of the National Agricultural Technology Center, according to the general situation and characteristics of the cotton pests and diseases in the early stage, combined with the current cotton pests and diseases occurrence base, cotton variety layout and growth, meteorological conditions and other factors, the pests and diseases in the middle and later stages of cotton will be heavier than the earlier stage, and the pests and diseases will be partial. The relevant departments of agriculture must strengthen the dynamic monitoring of the occurrence of pests and diseases, and timely and accurately use drugs to prevent and control the outbreak of the key pests and diseases.

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< p > it is known that < a href= "//www.sjfzxm.com/news/index_s.asp" > cotton > /a > middle and late stages, the pests and diseases generally occurred in a moderate degree, and the damage was more serious than the earlier stage. Pests were still the main ones. The main species were Helicoverpa armigera, cotton bug, aphid, cotton spider mites and tobacco whitefly.

It is estimated that the occurrence of diseases and insect pests in the middle and late stages of cotton is 180 million mu, of which 150 million pests occur and 30 million mu.

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< p > cotton bollworm: the three generation of Helicoverpa armigera is expected to occur in 25 million mu, and the cotton area in China is generally in the middle range, and some areas in Henan, Hebei, Jiangsu and Anhui tend to occur.

The second generation of adults (the 3 day of adult emergence is the three generation of egg bloom). The cotton and the Yellow River basins in the Yangtze River Valley are much earlier or closer than usual. Xinjiang and Gansu in the northwest inland cotton region are late, and the specific period is 1.

The four generation of Helicoverpa armigera occurred in the area of 15 million mu, which occurred moderately in the cotton area of the Yangtze River Valley. The the Yellow River River Basin and the southern Xinjiang cotton region were lighter. The larvae occurred in the late August to the middle of September.

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< p > cotton bug: it is expected that the 16 million generation of the three generation will take place in the Yangtze River Valley and the the Yellow River River Basin and the southern part of Xinjiang. The peak period will be from mid July to early August.

The 15 million generation of the four generation occurred in the middle part of the Yangtze River Basin and the the Yellow River River Basin. The peak period occurred from mid August to early September.

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< p > Aphis gossypii: Aphis gossypii is expected to occur at 30 million mu in the northern part of Xinjiang, and it can occur in some parts of the northern part of Xinjiang. Most other cotton regions occur in the middle stage. The peak period is from late July to mid August.

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< p > cotton spider mites: it is expected that 23 million mu will occur in Jiangxi and Jiangsu. The most parts of the Yangtze River Basin and Xinjiang are moderate. The cotton area in the the Yellow River River Basin will be lighter. The peak period will be from late July to mid August.

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< p > Bemisia tabaci: 15 million mu is expected.

The Yangtze River Valley, the the Yellow River River Basin and Xinjiang southern and eastern Xinjiang occurred moderately, and the peak period was August.

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< p > Red bollworm: it is expected to increase momentum in the Yangtze River Basin cotton area. The overall occurrence is lighter, with an area of about 4 million 500 thousand mu.

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< p > Verticillium wilt: 10 million mu is expected.

The partial cotton area in Hebei, Hubei and Xinjiang occurred moderately, and the cotton area in the Yellow River basin, Yangtze River Basin and Xinjiang mostly occurred in mid August to early September.

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< p > bell disease: there is a moderate risk in each < a href= "//www.sjfzxm.com/news/index_c.asp" > cotton area < /a >, with an estimated area of 10 million mu, and the peak period is from mid August to mid September.

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