The hazy days in winter can lead to low-temperature and high-humidity planting environment, which can easily induce strawberry powdery mildew and gray mold. Strawberry growers should pay extensive attention and do a good job in the prevention and control of these two diseases.
Powdery mildew mainly damages the leaves and fruits of strawberry and fumigates sulphur in the early stage of onset. In the greenhouse, every 10 meters in the center of the greenhouse, an automatic temperature-controlled sulphur fumigation tank is placed. After fleacing, the membrane is fumigated after the evening of the evening, and no more than 4 hours per day. Continuous fumigation for 3 days can have obvious effects. When severe disease occurs, choose 10% difenoconazole water dispersible granules or buckwheat can (tetraflumizole) spray. The spraying of the main spray leaves the back, each interval of 7 days, continuous spray 3 times.
Botrytis mainly damages flowers, calyx, petals and fruits, and leaves. When the diseased plants and diseases are found in the field, they are removed from the shed in time, and the old leaves and dead leaves are removed in time; excessive application of nitrogenous fertilizers should be avoided. Phosphorus and potassium fertilizers should be added; during the onset of disease, exhaled air should be increased and the humidity should be reduced to below 50%. The shed raises the temperature to 35°C, dries for 2 hours, and then releases the air to cool down. Continuous boring of the shed 2 or 3 times can play a significant inhibitory effect. When the disease is severe, you can choose 50% Fludioxonil wettable powder 4000 times solution or 50% Boscalid water dispersible granules 1500 times solution or 50% fastinking WP 1000 times spray, spray every 7 days 1 Times, continuous spray 2 or 3 times, it is recommended to alternately apply drugs to avoid drug resistance.
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