First, do not choose cotton plants with serious pests and diseases. Cotton plants with dry and verticillium wilt and cotton plants with poor resistance to insects must be eliminated, and cotton plants that perform well in seriously ill areas can be kept.
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Cotton seeding "eight do not"
Second, do not choose the pre-peach peach and the late autumn peach. The growth and dysplasia of Fuqian peach and late autumn peach are poor, the maturity is poor, the boll weight is light, the seed germination rate is low, and the growth is weak, which is not suitable for use.
Third, do not use the "peeling peach" cottonseed. Some cotton farmers still have the habit of "splitting the mouth peach and picking the wet flower" for the fully developed pupa. Because it is not fully mature, it is not finished after maturity, and it is absolutely impossible to keep the seed.
4. Do not use cottonseed that sprays ethephon. Spraying ethephon can promote cotton early maturity for 5 to 7 days, but damage to cottonseed is large, resulting in incomplete development and can not be planted.
5. Do not use heavily degraded varieties. Cotton is a regular cross-pollination crop, and the outcrossing rate is 3%-20%. In the continuous breeding process after several years of insect-resistant cotton varieties, if it is not purified and rejuvenated, it is often caused by insect pollination. For plots with low purity, avoid seeding.
6. Do not choose hybrid cotton varieties. Under the current level of science and technology, hybrid cotton varieties are not perfect, and the separation of F2 generation is very serious and should be avoided.
Seven, do not sun on the concrete floor. Cottonseed with higher water content on the cement floor will cause some cottonseed to form “dumb seeds†and lose their ability to germinate.
8. Do not store with pesticides or fertilizers. Some farmers have long-term storage of cottonseed with pesticides and chemical fertilizers. The germination rate is sharply reduced due to poor ventilation and toxic gases emitted by pesticides and fertilizers that damage the normal physiology of cottonseed.
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