Common pests and diseases of strawberry and control measures

Strawberries are cultivated in a greenhouse, and the sheds are hot and humid, which creates favorable conditions for the occurrence of pests and diseases. The common pests and diseases of grass mold and their control measures are introduced as follows:
First, common diseases: î€„
1, leaf spot disease. Mainly harmful to the leaves, the typical symptom lesions are gray or taupe round spots at the center, surrounded by purple-brown, like snake eyes. The disease is prone to occur when warm and high in humidity, and the old leaves first develop and gradually extend to the whole plant. Before the flowering result, the incidence was light, and a large amount occurred after the start of harvesting. î€„
2, powdery mildew. The whole plant is prone to occur, dark stains occur when the leaves are damaged, and the size is different. Then, white powder is produced on the back plaque, and reddish-brown lesions appear in the later stage, and the leaf margins shrink and scorch. When the fruit is damaged early, it stops developing and is dry. If it is damaged in the later stage, it will produce a layer of white powder on the surface. It can occur continuously throughout the growing season and is extremely harmful. î€„
3. Gray mold. The main disease occurs after flowering, the pathogen first invades the small fruit, and the fruit surface that comes into contact with the soil surface first develops, and the fruit along the fruit stem is extended to the peduncle, and the dried rot is dead. When the fruit has been invaded, it appears dark brown after the water-stained pale brown plaque, and a layer of gray mold appears on the surface to make the fruit soft and rot. Gray mold blows away with the wind and spreads to other fruits to cause disease. î€„
4, root rot. Starting from the lower leaves, the leaves turn reddish brown, gradually wilting upwards, and even die, the roots begin to turn dark brown and decay in the middle, and the central column of the roots is red. î€„
5, yellow blight, also known as bacterial wilt, the initial onset, stem and leaf atrophy during the day, recovery in the evening, 2-3 days after wilting and dead, hand squeezing the disease stem, there is turbid white mucus outflow, the main pathogens with the disease Residual plants remain in the soil for the winter, can survive for several years, when the conditions are appropriate, from the root or stem wound invasion, strawberry continuous cropping or rapeseed continuous cropping is often prone to serious disease, and even caused a large number of deaths. î€„
Second, the main prevention measures: î€„
1. Comprehensive prevention. Strengthen field management, cultivate strong seedlings, implement 2-3 years of rotation, transplant soil on sunny days, avoid damage to roots, timely cover film, scaffolding, diligent management, timely removal of diseased fruit, dead old leaves, and removal of diseased plants. Concentrate deep or burn, keep the strawberry garden clean and ventilated, pay attention to ventilation and ventilation in the shed, and reduce the humidity and exhaust gas. î€„
2. Disinfect the soil before planting. Before transplanting the strawberry, use 40% asparagus powder 600 times solution, pour it on the noodles, then re-soil, and transplant it to effectively kill the bacteria in the soil, reduce the number of bacteria in the field, and reduce the chance of infection. î€„
3. Regular spraying and prevention. During the strawberry growing season, the medicine is sprayed once every 10-15 days, each time with 40% of asparagus powder and 500 times of agricultural streptomycin 150PPM. If a disease occurs, add a rooting once, spray once every 4-5 days, even spray 2-3 times. When yellow blight occurs, add streptomycin 250PPM. When the humidity in the greenhouse is too high, it is not easy to spray. It can be fumigated with "one smoked spirit" and smoked once every seven days. If powdery mildew occurs, 20% powder rusting 1000-2000 times solution can be used, and gray mold can be sprayed alternately with 50% keiling 1000 times liquid and asparagus green liquid solution, the effect is better. Third, common pests and prevention: î€„
The main pests of strawberry are aphids, red spiders, and larvae of Spodoptera litura. The mites can be sprayed with 20% of the cockroach 1000 times solution. The red spider can use 2.5% Uranus or 73% gram of 2000 times liquid. The larvae of Spodoptera litura can be sprayed with 5% taibao 1000 times liquid. (Yang City Agricultural Bureau Shao Zhongqing)
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