How do apple trees have ringworm?
2022-11-08 14:06:27
Branch ringworm disease damage
The cause of apple ring vein disease is named after the growth rings. It mainly damages the branches and fruits of the apple tree, and often causes a bark necrosis and fruit rot with a mixture of dry rot. The damage to the leaves is lighter. Most pesticides are used for prevention and control. The specific issues are as follows.
symptom
On the trunk of the disease, a small borer is formed centered on the lenticels and gradually enlarged to form an oval brown spot. In later stages, the diseased department lost water, its texture was firm, its edges cracked, and it looked like a saddle. Many lesions were connected together and the epidermis was very rough.
The majority of the disease on the fruit occurred in the near mature period or storage period. When the disease began, it was centered on the lenticel, and spots of water stains, browns, and near circles appeared. There were blushes around, and gradually expanded afterwards. The blush disappeared, forming a thick and thin contrast. Brown ring-shaped lesions, gradually producing black dots later, in the high temperature and humidity conditions, the entire fruit rapidly soft rot, the flow of light yellow-brown mucus, diseased fruit dehydration and shrinkage to form a stale fruit.
Onset of the leaves, resulting in irregular brown lesions, gradually turned taupe.
Control methods
1. Strengthen the management of tree and tree management trees includes timely fruit thinning, yield control, foliar spraying, etc.; management under the tree includes increasing organic fertilizer, improving soil fertility, timely irrigation, etc., to enhance the tree's own disease resistance. .
2, timely removal of diseased branches, severe disease of the trunk, the removal of tumors after the removal of lime sulfur spray agent.
3, prevention and treatment of stem ring rot disease in the "May 1" about the first time after the rain, the use of prevention and treatment of ringworm disease spray control, you can receive a multiplier effect, but also to protect tree vigor.
4, control of fruit ringworm disease bagging apple before spraying bagging, spray a fungicide to prevent ringworm disease, non-bagging apples in the middle of July using fungicides, spray control 3 times (spray once every 15 days) 5 days before fruit picking, spray and control again (bagging fruit to remove fruit bags), control effect can reach more than 90%.
The cause of apple ring vein disease is named after the growth rings. It mainly damages the branches and fruits of the apple tree, and often causes a bark necrosis and fruit rot with a mixture of dry rot. The damage to the leaves is lighter. Most pesticides are used for prevention and control. The specific issues are as follows.
symptom
On the trunk of the disease, a small borer is formed centered on the lenticels and gradually enlarged to form an oval brown spot. In later stages, the diseased department lost water, its texture was firm, its edges cracked, and it looked like a saddle. Many lesions were connected together and the epidermis was very rough.
The majority of the disease on the fruit occurred in the near mature period or storage period. When the disease began, it was centered on the lenticel, and spots of water stains, browns, and near circles appeared. There were blushes around, and gradually expanded afterwards. The blush disappeared, forming a thick and thin contrast. Brown ring-shaped lesions, gradually producing black dots later, in the high temperature and humidity conditions, the entire fruit rapidly soft rot, the flow of light yellow-brown mucus, diseased fruit dehydration and shrinkage to form a stale fruit.
Onset of the leaves, resulting in irregular brown lesions, gradually turned taupe.
Control methods
1. Strengthen the management of tree and tree management trees includes timely fruit thinning, yield control, foliar spraying, etc.; management under the tree includes increasing organic fertilizer, improving soil fertility, timely irrigation, etc., to enhance the tree's own disease resistance. .
2, timely removal of diseased branches, severe disease of the trunk, the removal of tumors after the removal of lime sulfur spray agent.
3, prevention and treatment of stem ring rot disease in the "May 1" about the first time after the rain, the use of prevention and treatment of ringworm disease spray control, you can receive a multiplier effect, but also to protect tree vigor.
4, control of fruit ringworm disease bagging apple before spraying bagging, spray a fungicide to prevent ringworm disease, non-bagging apples in the middle of July using fungicides, spray control 3 times (spray once every 15 days) 5 days before fruit picking, spray and control again (bagging fruit to remove fruit bags), control effect can reach more than 90%.
Nitrile Coated Glove,Nitrile Coated Work Gloves,Nitrile Coated Hand Gloves,Nitrile Foam Coated Gloves
Jiangsu Hespax Security Co., Ltd , https://www.hespax.com