MySheen

Control measures of Strawberry Diseases in greenhouse

Published: 2024-11-22 Author: mysheen
Last Updated: 2024/11/22, Strawberry leaf blight is mainly harmful to petiole, fruit pedicel and calyx. 1. Symptoms. At the initial stage of the disease, dark purple-brown dull spots appeared on the leaves, then expanded into irregular spots, and the color of the edge and center of the spot changed little, so it was difficult to distinguish the symptoms of this disease from that of brown spot. Brown spot and leaf blight.

1. Preventive measures: deep trenches and high beds should be covered with plastic film, the general depth of the ditch is 30ml / 40cm, and the plastic film should be covered near the bottom of the ditch, so as to reduce the incidence of contact between fruit and soil and do a good job of drainage to reduce the harm. Remove withered and diseased leaves in time. Increase the application of organic fertilizer, especially biological fertilizer "Tudele" to improve the soil. Properly balance the amount of nitrogen, phosphorus and potassium, control the amount of nitrogen fertilizer, prevent overgrowth, at the same time, reasonable close planting, the number of trees per mu should be controlled within 8000 plants, in order to facilitate ventilation and light transmission. Supplement appropriate amount of micro-fertilizer to improve disease resistance. Available boron, copper sulfate and manganese sulfate were sprayed at the beginning of young leaf growth and bud stage. In order to enhance the disease resistance of strawberries, marine biological immune agent Haotianli was sprayed once for 10 days in the growing period for 4 times in order to enhance the disease resistance. 2. Chemical control: the principle is the prevention and control method of biology + chemical medicine, internal resistance + external inhibition. Powdery mildew 25% powdery mildew 25% vermicellin wettable preparation 3000ml 5000 times + Haitanli 600x liquid, or 10% high water dispersible granules 2000ml 2500x + Haitanli 600x liquid, or 12.5% nitrilazole EC 1500 times and fungicides for alternate control. Botrytis cinerea can be sprayed with 500 times of polyoxin wettable powder + 600 times of Spick, or 50% of 600 times of melamine during the growing period (avoiding flowering). Pay attention to the alternate use of drugs.

 
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