Prevention and control of strawberry snake eye disease

It is not only harmful to leaves, but also to petiole and fruit stalk, which is a common disease of strawberry. 1. Symptoms. At the initial stage of the disease, a small dark purple spot was formed, and then expanded into a nearly round or oval spot, the edge of the spot was purplish red, the center was grayish white or grayish brown, and there were slight wheel lines, which made the whole spot look like a snake's eye, and did not form small black grains on the spot. two。 Mode of transmission and conditions of onset. The pathogen overwintered in the form of diseased remains and spread by air flow as conidia in the second year. When cultivated in the open field, the disease is serious during harvest, and it is also serious in the pseudo-planting field when raising seedlings, such as excessive irrigation or heavy rain. 3. Prevention and control methods. Remove the diseased old leaves as early as possible and destroy them to avoid continuous cropping; at the initial stage of the disease, use 75% chlorothalonil wettable powder 500 times as much as 700 times, and 70% Dysen zinc wettable powder 200 grams per mu with 75 kg water, sprayed once every 10 days.