< p > > a href= "//m.pmae.cn" > cotton farmers < /a > when selecting cotton varieties, we should scientifically select the varieties and specific varieties of the road according to the principle of "obeying the overall situation, giving priority to efficiency, solving outstanding problems and meeting production conditions".

The following 7 situations can be considered: < /p >

< p > one is to establish a production base for special quality cotton varieties (such as colored cotton and high-quality special cotton) when the relevant departments or cotton leading enterprises are "a href=" //m.pmae.cn/news/index_c.asp "> /a >" organizing "regionalized and large-scale contract production. We should select special varieties designated by the organization units, conscientiously fulfill the contract, grow cotton well and sell products to the designated purchasing units on time.

The organization must first conduct adaptive tests on the selected varieties in the local area, proving that the variety is completely suitable for the local climatic conditions and production conditions, and ensures that the farmers in the contract have better income than other varieties.

In this case, cotton seeds are generally supplied by tissue units for reproduction (or procurement).

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< p > two is to arrange pure spring cotton cultivation or spring cover planting in cotton fields with better fertilizer and water conditions. When breeding seedlings or pplanting with plastic mulching, it is best to select Insect Resistant Hybrid Cotton Varieties with large production capacity, such as Lu Miyan 15, Lu Mian 20, GKz26 and GKz29.

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< p > three is that although the fertilizer and water conditions of cotton fields are better, there is no seedling pplant habit or precision sowing condition covered with plastic film. When using more varieties and inconvenient selection of hybrid cotton varieties, we should select medium and early maturing insect resistant cotton varieties with good germination characteristics, strong growth potential, high plant height, loose plant type, and late premature decay, such as Lu Miyan 16, Lu Mian 21, Lu Mian 22, DP99B, etc.

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< p > four is the cotton field with high incidence of Verticillium Wilt and continuous cropping for many years. The cotton varieties with strong resistance to Verticillium wilt should be selected first, such as Lu Miyan 18, Lu Mian 22, China cotton mill 45 and DP99B.

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< p > five is a cotton field with pure plastic film mulching, or sandy soil with strong soil quality and easy to decay early. It is best to choose medium maturity or early maturity insect resistant cotton varieties with a longer growth period, stronger resistance to Verticillium wilt, late leaf function and premature decay, such as Lu Miyan 18, Lu Mian 22, DP99B and DP33B.

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< p > six, in areas where more people and less cotton are used for cultivation, it is best to use medium and early maturing insect resistant cotton varieties with weak vegetative shoots and weak buds, compact plant type and medium leaf size, such as Lu Miyan 16, Lu Mian 17, Lu Mian 22, China cotton plant 41 and Xin cotton 33B.

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< p > seven is to interplant cotton in wheat field with narrow intercropping system. We should select short season cotton < a href= "//m.pmae.cn/news/index_f.asp" > varieties less than /a during growth period less than 110 days. The coastal saline alkali cotton fields that fail to press the soil to produce moisture and the cotton fields that can not be planted before planting, we must select the special early maturing varieties with the growth period less than 115 days after rain catching cotton in May 8th.

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