Hot and rainy incoming, beware of pepper diseases and insect pests

Qingdao Agricultural University professor Zhang Lining in recent study of pepper growth situation, because of high temperature and drought has been found recently, some chili pepper virus disease, anthracnose and yellow tea mite, summer hot and rainy, hot pepper diseases and pests more, spread fast, difficult management. Now briefly describes the symptoms of these diseases and prevention and treatment methods.
Pepper Virus Disease
Symptoms: Pepper Virus disease is mainly mosaic virus disease. Often occurring on top leaves, characterized by leaves, flowers, leaves, yellows, and rolled leaves; plants appear to shrivel, become smaller, or have spots on the fruit. In severe cases, the whole plant leaves the leaves, which causes the photosynthesis of pepper to be seriously blocked or black and necrotic at the top.
Prevention and control methods: prevention and treatment of Pepper Virus disease should follow the principle of "preventing disease first and curing worms". It is the season of wheat harvest, and the temperature is high. Aphids, Planthopper and thrips appear to be heavier. These insects are the main culprits of the spread of virus diseases. The pest can be controlled at the stage of spot film by covering the insect net, avoiding insects and insecticides and killing insects. The conditions can be selected to cover more than 60 mesh insect nets, chemical control on colonization after spraying pulideng fish protein 400~500 dilution, 5~7 days of spraying again, continuous spraying 2~3 times, ensuring strong plant growth, enhanced plant resistance. Has the virus pepper, should be the right remedy, can use virus spirit or plant disease spirit 1000 times + pulideng fish protein 400 times or 1500 times over the net + imidacloprid; heavy harm to thrips plots available green love + 1500 times liquid + pulideng fish protein 400 times liquid chemicals mixed, whole plant at one time 5 days, continuous spraying 3~4 on the prevention and control of aphids, thrips prevention of Pepper Virus disease, ideal effect.
Pepper Anthracnose
Symptoms: infected leaves, early faded green water spots, gradually turned to brown spot, middle light gray, whorled dot. Fruit stalk damaged, brown depression spots. The fruit was murdered, early water soaked Brown round spot or irregular spots, spots have raised concentric rings, and there are many black dots, when wet spots from the surface of red viscous material.
Prevention methods: strengthen field management. The rational fertilization, planting density, avoid high temperature and humidity, attention to drainage, the timely removal of diseased leaves, and disease fruit residues, pepper dressing properly increase the use of phosphorus and potassium, with water per acre with water Shipuli on fish protein 2~4 kg + balanced NPK water soluble fertilizer 5~10 kg. The best early prevention, early onset can be sprayed 70% wettable powder of 600 ~ 800 times liquid, or 80% mancozeb WP 500 times liquid; can also use prochloraz 1200~1500 times liquid spraying of 5~7 days time, continuous spraying 3~4.
Pepper tea yellow mite
Summer outdoor pepper pests, in addition to aphids, cotton bollworm, thrips outside, but also prone to tea yellow mite. It is not easy to detect the early stage of the Yellow mite, which is not even visible to the naked eye at first. But once it happens, will cause a large area of pepper yellow leaf and leaf, therefore, the latter often impossible to guard against, yellow tea mite should prevent in advance.
Control method: the yellow tea mite with strong twigs, buds mainly in the primary distribution of tender tip position of the crops of the most dense, the heaviest damage, so to advance drug prevention, and to focus on young parts of spraying. In the past few years, according to many farmers and our field experiments, the spraying of fish protein could effectively prevent and reduce the harm of yellow mite. The specific method is: use pulideng fish protein 400 times 1500 ~ +1.8% abamectin EC 2000 times liquid or 15% pyridaben EC 3000 times liquid + pulideng fish protein 400 times liquid spraying 2~3 times, can effectively prevent and control the damage of yellow tea mite.
(source: Guangzhou daily) [original title: "suit the remedy to the disease, prevent summer pepper disease"