The prevention and control method of sunflowers brown spot disease

The prevention and control method of sunflowers brown spot disease

The sunflowers brown spot disease is the important disease of sunflowers in heilongjiang province, which is the most important in the period of the plant period, which causes the leaf to die from the bottom up, causing the whole plant to die prematurely. The leaf is variegated, brown and yellow halo. There are many small black spots on the spot, which are the spores of bacteria, which can be broken off when wet and wet, and perforated. The stems and petioles are tan and elongated.

The disease is infested by sunflowers. The germ and spores were used in the winter of the disease, and in July, the spores were dispersed in large quantities, which were spread by wind and rain. It is especially heavy in heavy rain, heavy night dew, low ground, dense planting and heavy stubble.

Method of prevention and cure:

Reasonable rotation: more than three years in rotation with the crops of crops.

Strengthening cultivation management: suitable for early planting, reasonable planting, timely tillage and mowing of fertilizer, increasing the resistance of the plant. When the water is in the field, it should be discharged in time. At the bottom of the early stage of the disease, the leaf was removed, and the concentration was buried and the source of the infection was reduced.

Prevention and control: the treatment of sunflowers by treating the disease is effective for the disease, and the dosage is the same. In order to administer two kinds of diseases, both the flower and the lower part of the middle and lower part of the leaf were also sprayed and prevented from 1 to 2 times. Spraying, join canola lactone class plant growth regulator, can promote the growth of strain resumed as soon as possible, and 150 ml per hectare and 0.01% day FengSu 60 g 481 or 0.1% of masters abundant soluble powder or 0.003% increased 75 ml of the love, improve the control effect. At the same time, the dosage of the organic silicon auxiliary can be added to the organic silicon auxiliary, or the full 75 ml, which can improve the effectiveness of the treatment.