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Cotton selection techniques
Whether the cotton varieties used are excellent or not, must grasp the following points: First, select the varieties approved by the Crop Variety Approval Committee at or above the provincial level; second, look at the number of certified varieties and the defined planting scope; and third, see whether the varieties have production licenses. , business licenses, quarantine certificates; Fourth, we must understand the purity of conventional insect-resistant cotton seeds more than 98%, the purity of hybrid insect-resistant cotton F1 should reach more than 95%, try to use hybridization F1, without hybridization F2; Farmers with large area of ​​cotton will be guided to use one or two local main push varieties; Six will use certain varieties of two-valve (including two insect-resistant genes) transgenic cotton varieties, because the resistance of two-price transgenic cotton is more resistant to insects. Stable and lasting.