What medicine is effective for sunflower yellow leaf disease?

The onset of sunflower yellow leaf disease generally begins to show symptoms at flowering stage and reaches its peak at maturity stage. From the mesophyll part of the leaf tip, it began to fade, the leaf margin and lateral veins began to turn yellow, and finally died. The occurrence of sunflower yellow leaf disease is closely related to watering and illumination, and may also be caused by diseases and insect pests. Sunflower leaves turn to Huang Shi, so it is necessary to prescribe the right medicine in time and spray a proper amount of trichlorfon or fenitrothion powder.

Symptoms of sunflower yellow leaf disease

Sunflower yellow leaf disease is often that the new leaves are dark and dull, and the old leaves remain unchanged, or the tip and bottom of leaves begin to dry up, and then turn yellow from bottom to top, which has a great influence on its growth and flowering.

Harm of sunflower yellow leaf disease

The onset of sunflower yellow leaf disease generally begins to show symptoms at flowering stage and reaches its peak at maturity stage. The symptoms in the field mostly start from the lower leaves of the plant, fade from the mesophyll at the tip, turn yellow at the leaf margin and lateral veins, and finally die.

Causes of sunflower yellow leaf disease

Insufficient water application will affect the growth of sunflower, so it can be supplied reasonably to maintain its growth needs. Its growth is inseparable from the application of nutrients. Without nutrition, leaves will turn yellow. Fertilization can be reasonable according to the growth, but concentrated fertilizer cannot be used.

What medicine does sunflower yellow leaf disease use?

Sunflower leaves turn to Huang Shi, so it is necessary to prescribe the right medicine in time and spray a proper amount of trichlorfon or fenitrothion powder for prevention and control, and the effect is remarkable.

A specific drug for treating viruses.

Sunflower yellow leaf disease can be sprayed with metalaxyl and imidacloprid, which has a good effect on the prevention and treatment of yellow leaf disease.

Control methods of sunflower yellow leaf disease

1, the leaves are yellow: usually, the new buds of sunflower are dark yellow and dull, and the old leaves have not changed. At this time, the water should be controlled, and the plants should be dried before planting.

2. The leaves are dry and yellow: the top and bottom of the leaves begin to dry up, and the sunflower plants turn yellow from top to bottom, but the normal growth and development of new buds can be supplemented immediately.

3. Yellowing of leaves: Too much fertilization or too high concentration leads to yellowing of sunflowers, so it is necessary to immediately stop fertilization, properly water and clean organic matter.