Grape white rot
2020-03-03 00:05:53
Grape white rot, also known as grape rot, is one of the major grape diseases. This disease can cause lesions and fruit particles to fall off, resulting in a bumpy harvest.
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Symptoms The disease can develop throughout the fruit development period, which mainly damages the fruit and cobs and causes the cobs to rot. Diseased fruit is very easy to fall off, and when it is serious, the ground is full of a layer, which is the biggest feature of white rot.
? Spike? First light brown water spots on the small pedicel or cob, irregular lesions, gradually spread to the fruit. Severe disease causes full ear rot, the stems of fruit stems dry and shrink, and the diseased fruit panicles are easy to drop when shaken.
New shoots often appear on damaged parts such as toppings or mechanical wounds. At the beginning, the lesions were water-stained, and the lesions were long and thin, dark brown, and sag. The surface was dense with gray and white spots. When the lesions surrounded the branches for a week, the upper branches and leaves of the lesions changed from yellow to brown and gradually withered. The epidermis and the woody layer of the diseased spot showed messy filiform longitudinal fissures.
The leaves usually appear after the onset of the ear, and the symptoms occur only on the leaves. From the tips of the leaves and leaves, they began to appear as water-stained, brownish, round or irregular spots. They gradually expanded into large spots with rings. The dense gray and white spots appeared on the tops of the leaves. ??
The characteristics of the disease? White rot is a high temperature, high humidity type of disease. Continuous high humidity (above 95% relative humidity) and high temperature (24-28°C) are the most suitable conditions for disease epidemics after heavy rain in summer. A peak of incidence occurs after heavy rain or continuous rain, usually after one week after the rain. Especially in the event of storms, it often causes a white rot pandemic. The first infestation of white rot comes from the soil and is mainly spread by raindrops. The result is too low and easy to develop.
Insufficient fertilizer and water, extensive management, poor drainage, overgrown with weeds, excessive vines, poor ventilation and light transmission, and severe disease.
?? Prevention methods
??1, adjust the results of the site? Result site is high, the incidence is light. Double cross V-shaped results of the arrangement of the parts in the 80-100 cm, can reduce the incidence of disease.
?? 2, conscientiously do a good job in winter garden and soil disinfection? In winter cut, completely remove the residual branches, residual fruit, timely burning; deep winter soil; Pompon period on the dendrite, ground with an eradication agent sterilization (Bamei 3 -5-degree lime sulfur and 0.5% sodium pentachlorophenol). The vineyards with severe disease in the previous year. When the temperature in the growth stage of new shoots rises above 15°C, conidiospores in the soil have begun to germinate in winter. Spraying the eradicator once can greatly reduce the bacteria source of the initial infection. Note that it must be used in the absence of wind or breeze to avoid spraying the liquid to any part of the plant. ?? 3, scientific use of fertilizer, a reasonable amount of branches and leaving fruit, do a good drainage ditch, timely weeding, improve ventilation and transparency, enhance plant resistance to disease.
??4, chemical control? Before and after flowering should be Bordeaux mixture, Cobo and other protective agents. After the fruit is set, it will be treated after rain falls. Use pesticides that can cure both blackcap and boilworm anthrax. Later, according to the disease and weather conditions, spray once every 7-15 days. Pharmacy use 10% Shigao water dispersible granules 1000-1500 times liquid; 10% Shi Baoling 1500-2000 times liquid; 50% TUFE special 500-800 times liquid; 50% thiram 500-600 times liquid; 75% chlorothalonil Clear 500-600 times liquid; 70% mancozeb and 700% antivirus 矾700 times
Symptoms The disease can develop throughout the fruit development period, which mainly damages the fruit and cobs and causes the cobs to rot. Diseased fruit is very easy to fall off, and when it is serious, the ground is full of a layer, which is the biggest feature of white rot.
? Spike? First light brown water spots on the small pedicel or cob, irregular lesions, gradually spread to the fruit. Severe disease causes full ear rot, the stems of fruit stems dry and shrink, and the diseased fruit panicles are easy to drop when shaken.
New shoots often appear on damaged parts such as toppings or mechanical wounds. At the beginning, the lesions were water-stained, and the lesions were long and thin, dark brown, and sag. The surface was dense with gray and white spots. When the lesions surrounded the branches for a week, the upper branches and leaves of the lesions changed from yellow to brown and gradually withered. The epidermis and the woody layer of the diseased spot showed messy filiform longitudinal fissures.
The leaves usually appear after the onset of the ear, and the symptoms occur only on the leaves. From the tips of the leaves and leaves, they began to appear as water-stained, brownish, round or irregular spots. They gradually expanded into large spots with rings. The dense gray and white spots appeared on the tops of the leaves. ??
The characteristics of the disease? White rot is a high temperature, high humidity type of disease. Continuous high humidity (above 95% relative humidity) and high temperature (24-28°C) are the most suitable conditions for disease epidemics after heavy rain in summer. A peak of incidence occurs after heavy rain or continuous rain, usually after one week after the rain. Especially in the event of storms, it often causes a white rot pandemic. The first infestation of white rot comes from the soil and is mainly spread by raindrops. The result is too low and easy to develop.
Insufficient fertilizer and water, extensive management, poor drainage, overgrown with weeds, excessive vines, poor ventilation and light transmission, and severe disease.
?? Prevention methods
??1, adjust the results of the site? Result site is high, the incidence is light. Double cross V-shaped results of the arrangement of the parts in the 80-100 cm, can reduce the incidence of disease.
?? 2, conscientiously do a good job in winter garden and soil disinfection? In winter cut, completely remove the residual branches, residual fruit, timely burning; deep winter soil; Pompon period on the dendrite, ground with an eradication agent sterilization (Bamei 3 -5-degree lime sulfur and 0.5% sodium pentachlorophenol). The vineyards with severe disease in the previous year. When the temperature in the growth stage of new shoots rises above 15°C, conidiospores in the soil have begun to germinate in winter. Spraying the eradicator once can greatly reduce the bacteria source of the initial infection. Note that it must be used in the absence of wind or breeze to avoid spraying the liquid to any part of the plant. ?? 3, scientific use of fertilizer, a reasonable amount of branches and leaving fruit, do a good drainage ditch, timely weeding, improve ventilation and transparency, enhance plant resistance to disease.
??4, chemical control? Before and after flowering should be Bordeaux mixture, Cobo and other protective agents. After the fruit is set, it will be treated after rain falls. Use pesticides that can cure both blackcap and boilworm anthrax. Later, according to the disease and weather conditions, spray once every 7-15 days. Pharmacy use 10% Shigao water dispersible granules 1000-1500 times liquid; 10% Shi Baoling 1500-2000 times liquid; 50% TUFE special 500-800 times liquid; 50% thiram 500-600 times liquid; 75% chlorothalonil Clear 500-600 times liquid; 70% mancozeb and 700% antivirus 矾700 times
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