A reader from Huaiyin District, Huaian City, called on January 5th: The peppers were transplanted for 30 days. After transplanting, the plants grew normally. Now they found that the heart leaves rolled up, the leaves were uneven and sporadic. No herbicides, insecticides, fungicides have been used, and roots grow normally. What's wrong with pepper? During the growth and development of pepper, 2 to 4 leaves on the upper part of the plant will have curled edges, uneven leaf surfaces, shrinkage, short plants, and poor growth. In severe cases, fallen leaves, flowers, and fruits will occur. There are many reasons for this. The optimum temperature for pepper growth is 20-30 ° C. The root system stops growing below 9 ° C, and the temperature is lower than 9 ° C. The mesophyll cells are frozen and the leaves are curled. When spraying pesticides and foliar fertilizers, the concentration is too high or it is sprayed around noon in the high temperature period, which will cause drug damage and fertilizer damage and cause leaf curl. The soil is deficient in trace elements such as iron and manganese, and partial application of nitrogen fertilizer can easily cause leaf curl. Viral diseases and tea yellow mites are also likely to cause leaf curl when they are severely harmed. It is understood that viral diseases and the yellow tea mites are more common in wintering peppers, and the symptoms are very similar. They both harm the young parts of the plant, make the leaves smaller and deformed, and the plants shorter, etc. In severe cases, they can cause leaves, flowers, and fruits. . The main difference between the two is that after the onset of the virus disease, the leaf edge curls upward, the leaves are uneven, the flowers and leaves shrink, and the diseased leaf thickens in the future, while the tea yellow mite harms the leaf edge curls downward, the whole leaf is green, and the heart leaves Old leaves are shriveled; the tea yellow mite harms the old leaves and heart leaves, and the virus disease mainly harms the heart leaves; the back of the leaves harmed by the tea yellow mite is shiny with gray-brown or yellow-brown luster; luster. Leaf curl symptoms appear in the pepper field. Pay close attention to the plants to distinguish them, and treat them symptomatically after diagnosis. Capsicum virus disease is difficult to prevent and treat with medicines. It should be prevented as soon as possible. Attention should be paid to preventing and controlling aphids, whitefly, and other insect-transmitting insects in the shed. Spiroethyl, bromocyanidin, flufenapyr, and other drugs can be used to reduce the disease happened. When sporadic disease strains appeared in the field, they were immediately removed, and the whole field was sprayed with anti-viral drugs such as aminooligosaccharin and morpholinoguan hydrochloride. There are many acaricides that can be used to control yellow tea mites in peppers, such as pyridaben, acetylmite, triazotin, and avermectin. When spraying, focus on spraying the middle and lower leaves evenly to ensure that the back of the leaves is also sprayed with drugs to improve the control effect. Disclaimer: Some articles on this website are transferred from the Internet. If you have third party legal rights, please inform this website to deal with them. phone Magnesium Acetate,Tetrahydrate Magnesium Acetate Tetrahydrate,Magnesium Diacetate,Pure Magnesium Diacetate,Magnesium Diacetate Tetrahydrate Wuxi Yangshan Biochemical Co.,Ltd. , https://www.yangshanchem.com