Inquiries: I am a farmer in Hezui Town, Honggu District. In the recent greenhouse strawberry, many buds and sprouts appear wilting and blue-green, and there are brown-like spider-like things. What disease is this disease?
Answer: This is a typical strawberry bud blight. The disease is an important disease in strawberry production. It is widely distributed and occurs widely. Exposed fields and protected areas all occur.
Symptoms: The disease mainly damages buds, buds, stipules, and petiole bases. The buds and buds were infected with wilting, blue and dry, and then dark brown withered; the stipules and petiole base were infected and the stipules drooped, resulting in dark brown lesions on the leaves and buds. The leaves were reduced, the amount of results was also significantly reduced, and the leaves and the fruit were deformed, and were easily parasitized by Botrytis at the later stage. The surface of the diseased part often produces sparse gray-to-light brown spider web hyphae (the mycelium produced by gray mold is a thick gray mold layer).
Incidence of the law: bacteria with mycelium or sclerotium with the disease in the soil in winter, can survive in soil rot 2 to 3 years. After the strawberry is planted, it will be at a low temperature or even on a rainy day. It will be heavy if it is cold or it suffers from long-term high humidity.
Control measures: 1. Soil-free seedlings, seedlings before the selection of disease-free seedlings colonization. 2. Seriously soil treatment. Available 50% licorice WP or 50% carbendazim WP, 7% WP WP, 1.5 kg per mu, mixed fine soil 30 to 50 kg, even before planting in the planting hole. 3. Do a good job in the management of the greenhouses, in particular, do a good job of ventilation and dehumidification. The watering in the low temperature stage must be carried out in the sunny morning and can not be flooded with water, and attention should be paid to ventilation and humidity after irrigation. 4. After spraying buds spray plants. The plants can be sprayed with 5% Jinggangmycin aqueous solution 1000 times or 10% solution drying suspension agent 300 times. 5. If it is found mixed with botrytis, use 65% metalaxyl wettable powder 600 times, 40% application of leprosy 800 to 1000 times, 50% nellikon wettable powder spray 1200 times, or use A Cream of dust dust 1 kg per mu. Can also be used 20% Tec smoke smoke 300 grams per acre smoke, the effect is better.
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