Causes of the rot of Begonia leaves. Prevention and control measures for the rot of Begonia leaves With the arrival of spring, many flowers and trees have begun to enter a period of vigorous growth. Begonia trees are a traditional ornamental plant in our country, and their beautiful flowers and green leaves always attract people's attention. Recently, many flower friends have reported that the leaves of their Begonia trees have rotted, which not only affects the appearance of Begonia trees, but may also seriously affect the growth of Begonia trees. This article will provide you with a detailed analysis of the causes and prevention and control measures of crabapple leaves. Reasons for the rot of crabapple leaves 1. The main reason for the rot of crabapple leaves by bacteria is bacterial infection, such as crabapple leaf spot disease, crabapple black spot disease, etc. Under suitable climatic conditions, these bacteria will invade the leaves of crabapple trees, causing spots and disease spots appear on the leaves, which then spread to the entire leaves, eventually causing the leaves to rot.
2. Insect crabapple leaves rot may also be caused by pests, such as aphids, red spiders, etc. These pests will absorb the juice of crabapple trees, causing malnutrition of the leaves, which in turn causes the leaves to rot.
3. Improper water management The crabapple tree has a high demand for water, but improper water management can also lead to the rot of the leaves. If too much or too little water is watered, it will affect the growth of the crabapple tree and cause the leaves to rot. phenomenon.
4. Begonia trees need sufficient sunlight due to insufficient light. If they are exposed to a dark environment for a long time, their leaves will rot due to insufficient photosynthesis. Prevention and control measures for rotten leaves of crabapple 1. Strengthen disease prevention and control (1) Regularly spray fungicides, such as Bordeaux mixture, carbendazim, etc., to prevent bacterial infection.
(2) Cut off diseased leaves in time and burn them centrally to reduce the spread of bacteria.
2. Control pests (1) Regularly inspect crabapple trees and take timely measures when pests are discovered, such as spraying pesticides and releasing natural enemies.
(2) Keep trees clean and reduce pest habitat.
3. Reasonably watering (1) According to the growth habits of crabapple trees, water timely to keep the soil moist.
(2) Avoid watering too much or too little to avoid affecting the growth of crabapple trees.
4. Increase the light appropriately (1) Place the crabapple tree in a sunny place to ensure that it fully receives light.
(2) If conditions permit, the crown can be appropriately trimmed and the light can be increased.
5. Fertilization management (1) Apply fertilizer in a timely manner according to the growth needs of crabapple trees to ensure sufficient nutrients.
(2) Avoid excessive fertilization to avoid fertilizer damage.
There are many reasons for crabapple leaves to rot, but as long as reasonable prevention and control measures are taken, the occurrence of the disease can be effectively controlled. I hope this article can be helpful to the majority of flower friends and make your crabapple trees full of vitality.
References: [1] Zhang Wei, Li Ming. Research on the control technology of crabapple tree diseases and insect pests [J]. Plant Protection, 2018, 44 (2): 1-4.
[2]Wang Lili, Zhang Xiaohui. Cultivation and management techniques of crabapple trees [J]. Agricultural Technology, 2017, 20 (3): 56-58.