Cotton verticillium wilt is the best prescription

1. The consequences of rotation are good. The use of clinical theory and superstitious experiments have confirmed that one year can increase the incidence of disease by 20%, increase the incidence of disease by 30% in 2 years, and increase the incidence of disease by 45% in 3 years. Aggravate 65% of the disease in 4 years.

2. Potassium fertilizer is very effective. The rate of Verticillium wilt in cotton fields with potash fertilizer and inorganic fertilizer was significantly lower than that of the control. Therefore, in the application of nitrogen, phosphorus, trace fertilizer basically, moderate fertility plot Mushi pure potassium 10 kg, farm inorganic fertilizer 2 square, can increase the production of Verticillium wilt.

3, site formation disease light. Smooth cotton fields, eliminate dead areas, fill in trenches and waves, and improve drainage systems. To avoid the accumulation of water in the cotton fields after the rain is one of the ways to prevent cotton verticillium wilt from neglecting negligence.

4, choose the original species have a guarantee. The national trials and provincial trials introduced by the scientific research section are usually selected through the disease nursery and are resistant to disease. Planting cotton seed is one of the most economical and useful ways to prevent Verticillium dahliae in cotton.

5, delay sowing disease resistance. Insect-resistant cotton is mostly a medium-early-maturing species, and harvesting should not be premature. The early stage of harvest is low, the flowering buds are early, the harvest is quicker, the seedlings are stronger, and the disease resistance can be strengthened.

6, remove the film for a short time to mention resistance. The mulch cotton should be uncovered from the bud to the early flowering period, and the mulch cotton usually enters the budding period on June 20th. During this period, the uncovering film can promote the root barrow and improve the resistance and disease resistance of the cotton. At the same time, cultivating soil through the process to complete the drought can be poured, can be arranged.

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