Premature Aging Of Cotton Restricts Yield

Premature senility of cotton is a common phenomenon in cotton production in recent years. It is one of the important factors restricting cotton yield and quality. Due to single cropping of single fertilization and unidirectional absorption of soil nutrients, the premature senescence of cotton has become more and more intense due to continuous cropping for many years.

Premature decay of cotton: premature decay of cotton is the best period for cotton flowering and Bolling. Due to poor development or other reasons, cotton leaves become yellow and fall off early, even with diseases, resulting in death of all plants.

The preventive measures for premature senility of cotton are as follows:

1. Base application of boron fertilizer on the basis of selecting the best varieties, the application of organic and inorganic compound fertilizer at the bottom is 30~40 kg, and 100 kg to 200 grams of superior boron zinc.

Two, careful use of herbicides, because the herbicide fluorogrin is too harmful to cotton, it is not recommended to use. It is recommended to use cotton after seeding, and no herbicide before planting. After spraying the whole cotton field, the weeds can be effectively removed under the film and field. There is no harm and no influence on the growth of cotton flower.

Three, early root topdressing should be applied to the cotton field with root deficiency caused by soil loss, and the quality of the leaves should be treated by spraying the potassium dihydrogen phosphate, such as Ciba potassium dihydrogen phosphate, once every 7~10 days before and after the first flowering stage. It should be repeated for 3~4 times, and 50 mu per mu. For the cotton fields, in order to maintain and extend the functional period of the leaves, the boll weight can be increased by 50 grams per kg of potassium dihydrogen phosphate per mu and the 40 kg of heaven grant to 30 kg of water. Spraying once every 10 days and continuously spraying 2 times can effectively prevent premature senescence of cotton.