In recent years, grape rotting phenomenon has become increasingly serious. After investigation, the average rotten fruit rate reached more than 20%, up to 50% in special years, and individual plots almost eliminated, seriously affecting the yield and quality of grapes, bringing a certain amount of fruit to farmers. Economic losses. The causes of the corruption that the author has investigated and the prevention and control measures are described below:
First, the cause of rotten fruit
1. Germ infection. The main diseases causing grape rotten fruit are white rot, anthracnose, downy mildew, and leaf blight and black rot in special years.
2. Malnutrition. The debilitating tree vigor, the heavy emphasis on nitrogen fertilizer, the lack of potassium, calcium, trace elements, or excessive fruiting, and the large load, will all lead to weak plant growth and reduce disease resistance.
3. The orchard is closed. Summer is not timely cutting, orchard closed, poor ventilation and light transmission, coupled with excessive rainfall, soil and air humidity, will accelerate the spread of disease and spread.
Second, prevention and control measures
1. Completely remove the bacteria source. After the fall, the dendrant removes the diseased body before it is removed from the frame, and concentrates the removed diseased body. Buried before the spring and after spring unearthed, spraying 3 to 5 Baume degree lime sulfur plus 300 times solution of sodium pentachlorophenol or 50 to 100 times liquid Soolibac eradication source to reduce the incidence. During the growing season, the crops are cut in time in summer, and the diseased leaves, diseased fruits, diseased vines are removed, and the destruction is concentrated.
2. Strengthen management. Drain and loosen the soil immediately after the rain to prevent the humidity in the garden from becoming excessive. Timely vines, picking up the heart, keeping the frame airy and transparent. Increase potassium, calcium, and trace element fertilizers, such as potassium dihydrogen phosphate, ammoniacal calcium king, must receive more, high yield protection, etc., improve leaf function, enhance tree vigor, and improve disease resistance. Control production, reasonable burden. In accordance with the growth of plants to determine the yield, the average age of orchards per mu should be controlled at 2500 ~ 3500 kg.
3. Chemical control. For the orchard with severe disease in the previous year, before the occurrence of the disease, lime was poured on the ground, and the amount of mu applied was about 15 kg; soil with a pH of 7 or above could be used for spreading the medicine on the ground, and the medicine could be selected from Fumei Double and sulfur powder each. Lime 2 parts, the three are mixed evenly, sprinkled on the ground, the amount of 1 to 2 kg per mu; under the frame spraying Fumei double 500 to 600 times liquid or 50% carbendazim 500 to 600 times liquid or anthrax Fumei, anthrax spirit and so on Can control the initial infestation of pathogenic bacteria from the wintering of the soil. During the growing season, spray 1:0.5 to 0.7:200 Bordeaux mixture and spray once every 10 to 15 days to protect the leaves, branches and ears to reduce the chance of infection. In the event of diseases such as white rot, anthrax, boxworm, etc., symptomatic application should be made.
Tuber Fleeceflower Stem Extract
Tuber Fleeceflower Stem Extract,Japanese Knotweed Extract,Natural Tuber Fleeceflower Stem Extract,Tuber Fleeceflower Stem Extract Powder
NANJING ZELANG MEDICAL TECHONOLOGY CO., LTD , https://www.hawfitness.com