Strawberry gray mold in greenhouse

Strawberry gray mold is an important disease in greenhouse strawberries. When the flower is infected, the flower buds are initially small spots with large water-like needles, and then spread into nearly round or irregular large lesions, and gradually extend from the flower buds to the ovary and young fruit. When the humidity in the shed is high, The diseased part produces gray-brown mold. When the fruit is infected, the head of the first fruit is water-stained lesions, which then evolve into gray-brown spots. At the same time, the bacteria invade the flesh in depth. When the air is wet, the diseased fruit is wet and soft. When the weather is dry, the diseased fruit is dry and rot. Eventually the fruit fell. The leaves are damaged, generally the disease is first on the leaf base near the petiole, and the water spots are small spots at first, and finally the succulent large lesions are formed, and the diseased part is gray-brown. The temperature is 18~25°C, and the relative humidity of the air is more than 80%, which is beneficial to the disease.

Specific prevention methods: (1) Agricultural control. Reasonable close planting, reduce the humidity in the shed, and often remove rotten fruit and sick old leaves. (2) Chemical control. The chemical control has a smoking method and a spray method. The smoking method can be used with 50% per gram of 10% keeling agent, or 200 grams of 45% chlorothalonil smog. It is distributed at the evening, and immediately after ignition, the smoke is sealed for 1 night, and the next day, the door is ventilated. The spray method can be sprayed at the beginning of the disease by using 50% speed Keling wettable powder 800 times solution, 2.5% ketone suspension 1500 times solution, or 50% phorhin WP 1500 times solution. It is best to use the smoking method in rainy weather. Linyi Fertilizer Network Copyright
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Topmount Sink

Tpomount sink

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