Prevention and treatment of strawberry diseases in greenhouse

The main diseases of strawberry in greenhouse are leaf spot, powdery mildew, gray mold, root rot and verticillium.

First, powdery mildew Powdery mildew mainly damages leaves, but also invades flowers, fruits, fruit stems and petioles. The leaves are rolled into a spoon. The flower buds and petals are purple-red, and they cannot bloom or bloom completely. The fruit does not swell and is elongated and elongated; the young fruit loses its luster and hardens. Strawberries in the near maturity period will lose their commercial value. The prevention and treatment measures are: focusing on the sulphur mixture in the center of the disease center and its surroundings. After harvesting, cut the leaves in the whole garden, spray 70% thiophanate-methyl (methyl thiophanate) 1000 times solution or 50% thiram (detoxification) 800 times solution and 30% fluconazole (Tefrin ) 5000 times liquid, etc.

Second, gray mold gray mold is the main disease after flowering, can occur on flowers, petals, fruits, leaves. On the fruit of the inflated period, brown spots are formed and gradually enlarged, and the gray mold makes the fruits soften and corrupt, which seriously affects the yield. The control measures are: gray mold disease should be controlled from the bud to the flowering stage, using 25% carbendazim WP 300 times solution, 50% captan WP 800 times solution, 50% bacteriostatic (bubble) Hein) 500-700 times liquid spray.

Third, leaf spot leaf spot disease, also known as snake eye disease, mainly damage leaves, petioles, fruit stems, tender stems and seeds. A dark purple small shift point is formed on the leaf, and after expansion, a nearly round or elliptical lesion is formed, the edge is purple reddish brown, the center is grayish white, and the thin wheel is slightly rounded, so that the whole lesion is a snake-like shape, and no small black particles are formed on the lesion. The control measures are: timely removal of diseased leaves and old leaves. In the early stage of the disease, use 70% chlorothalonil WP 500-700 times solution, spray again 10 days later, or use 70% mancozeb wettable powder, spray 200 kg of water per 667 square meters of 75 kg.

Fourth, the root rot root rot begins from the lower leaves, the leaf edge turns reddish brown, gradually wilting upwards, and even die. The pillars began to turn dark brown and corrupt in the middle, and the central column of the roots was red. The control measures are: before transplanting the strawberry, using 40% asparagus powder 600 times solution, pouring it on the noodles, then covering the soil, and transplanting the whole plant to effectively kill the bacteria in the soil, reduce the number of bacteria in the field, and reduce the chance of infection. .

V. Verticillium wilt This disease is a soil disease. The main symptom is the deformity of the young leaves, the leaves turn yellow, and the surface of the leaves is rough. The leaf edge then browns inwardly until it dies. The control measures are: strict introduction of disease-free plant cultivation; shortening the renewal period; soil disinfection with 13.5-20 liters of chloropicrin; the affected person must be removed and burned.

This article URL: Prevention and treatment of strawberry diseases in greenhouses

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