The common pests and diseases of strawberry are virus disease, bud blight, gray mold, powdery mildew, aphids, red spider, and underground pests, which harm the quality of the fruit, cause a decline in yield, and affect economic efficiency.
1. Viral Disease: The spread of strawberry virus disease, which is mainly transmitted by shoots, aphids, and soil. Treatment of the virus is very difficult, and it is best to achieve control through prevention and control measures. The best prevention method is to use virus-free seedlings and change seedlings every 2-3 years. At the beginning of the disease, 20% of the virus A400 times or 1.5% of the diseased Eimin EC 400 times.
2. Bud Blight: It is a kind of fungal disease, which is caused by too deep planting, high density, high temperature and high humidity. Prevention and control of 5% of chlorothalonil dust agent per acre 110-180 grams, 5-6 places, the evening lighted closed the night, once every 7 days, even smoked 2-3 times.
3. Botrytis cinerea: Botrytis cinerea is an important disease of strawberry and it is a disease that occurs after the strawberry blossoms. Incidence conditions, the temperature is 18-28 °C, high temperature environmental conditions susceptible to disease. Symptoms: Fruit and stalk, bracts, leaves appear gray hairs. At the beginning of the infection, the upper part of the fruit or sepals became brownish or dark brown with water-stained lesions, sometimes the diseased part was slightly rimmed, and under the high temperature conditions, a white hairy villous mycelium cluster appeared on the back of the leaves. Transmission: Diseased plants, diseased leaves, and sclerotia remain in the soil. Control methods: 1 Do not apply excessive nitrogen fertilizer, and control the temperature. 2 Remove diseased leaves and fruit and bury them deeply. 3 Ensure ventilation between the lines, reduce humidity. (4) Chemical control: Disperse 80-100 grams of 20% quick-canning smoke agent per acre, or use 50% of quick-inking WP or 25% of iprodione WP to spray 1000 times, 7- Spray 10 times a day, even spray 2-3 times.
4, powdery mildew: onset conditions, temperature 15-25 °C. Relative humidity of 40% - 80% easy to disease. The disease mainly damages the leaves and can also invade the petioles, flowers, pedicels and fruits. Symptoms: There are white powder on the leaves, bracts, and pedicels. The leaves have small black spots and the leaves are curled. Transmission: Diseased plants, diseased leaves, and sclerotia remain in the soil. Control methods: 1 Remove the diseased leaves and fruit and bury them deeply; 2 Ensure ventilation between the lines and reduce the humidity. 3 Spray with 10% water-dispersible granules at a rate of 50kg per mu, 30kg, or spray with 20% triadimefon WP 1000 times.
5. Starscream: Spray with 1.8% avermectin EC 3000 times or 20% Bailing EC 1000-1500 times.
6. Locust: 22% of DDV smoke agent per acre is ignited and smoked overnight at 6-8 places with 500 grams of DDV smoke, or 50% of Kangweiwei WP 2000 times, or 3% of locust worm 1000- 2000 times, or spray with 10% imidacloprid wettable powder 1500 times.
7, underground pests: in the ground to dig 30cm30cm20cm long depth and width of the pit, containing horse dung, traps can kill. To add wine, water, sugar, and vinegar in a ratio of 1:2:3:4, add a small amount of DDV and put it in pots to trap and kill adult cabbage insects and adult tigers.
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