Strawberry gray mold is an important disease in strawberry in greenhouses. Once the flowers and fruits are infected, they quickly rot and spread rapidly, which has a great impact on the yield. In severe cases, the yield can be reduced by more than 40%. 1. Incidence conditions: The optimum temperature for the development of the pathogen is 18-25 °C, and the relative humidity of the air is more than 80%. The accumulation of water in the fields, overcrowding, improper ventilation, etc. will aggravate the occurrence and spread of the disease. 2. Symptoms: When the flower is infected, the flower buds appear as small spots with water-stained needles at the beginning of the flower buds, and then expand into round or irregular shaped lesions, and gradually extend from the calyx to ovary and young fruit. Causes young fruit to rot. When the humidity in the shelter is high, the diseased part produces brown-brown mildew. Fruit infection mainly occurred on the green fruit, and the top stigma of the fruit was spotted with water stains, which then evolved into gray-brown spots, and the pathogens penetrated deep into the pulp. When the air is wet, the disease is soft and corrupt, and when the weather is dry, the disease is dry and rot, eventually causing the fruit to fall. The leaf blade suffers damage, usually at the base of the leaf near the petiole, and begins to appear as a water-stained small spot. Afterwards, it expands into a nearly oval, semi-circular, or irregularly shaped gray-brown lesion, and eventually spreads to the petiole. Leaves dead. 3. Control methods: 1 Agricultural control: a reasonable dense planting to ensure the appropriate strain, spacing. The shed requires good ventilation, attention to drainage after the rain, timely ventilation and light, reduce the humidity inside the shed. Frequently remove rotten fruit, sick old leaves, and deeply buried or burned, to reduce the re-infection of pathogens. 2 Chemical control: The smoking method can be selected as follows: 10% fast-king spirit tobacco agent 250 grams per mu, or 45% chlorothalonil smoke agent 200 grams, distributed in the early evening points, immediately sealed and smoked 1 night after ignition. Open the door for ventilation. It is best to use the smoke method for overcast and rainy weather; spray method can be used for 50% Skoda WP 800 times, or 2.5% for SC 1500 times, or 50% acetaminophen WP 1000 times. In the initial stage of onset of spraying, medication is administered once every 7 days or so, and continuous administration is performed 2 or 3 times. Continuous cropping of strawberries should be based on prevention and should be applied before flowering. Hyaluronic Acid Dermal Filler,Hyaluronic Acid Fillers,Hyaluronic Acid Injections Face,Hyaluronic Injections Face Qingdao Beautiful Skin Biotechnology Co., Ltd , https://www.hafilleresthetic.com