포도흰얼룩증상의 발생생태적 특성
Ecological Characteristics of White Stain Symptom on the Grape in Korea
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참고문헌
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초록
BACKGROUND: The white stain symptom of grapeclusters and canes by dust-like particles occurred in manyvineyards recently. This study was conducted to investigatethe ecological characteristics of white stain symptom ingrapevines and vineyards. METHODS AND RESULTS: Optimal climate conditionfor white stain symptom was 25℃∼30℃ with 60% ofhumidity. Moreover, closed condition with same humidityshowed higher incidence rate of white stain symptom thanventilation condition. Grape varieties with black berry skinsuch as Campbell-Early and Kyoho were more sensitive towhite stain symptom compare to varieties with green andred berry skin. Although the pathogens were not detecteduntil March, they increased from April, and increasedsharply from mid of July. The pathogens may overwinter inthe infected stems and/or on the bark as a mycelium. According to the increase of sugar content of grape fromAugust to September, the mycelium which was parasitic onthe bark grew to move to the fruits through the stems, andfinally reached the fruit stalk to detach berries from theclusters. CONCLUSION: Well ventilation is recommended insidethe vineyard since mid-July with roll up an insect net. Inaddition, infected stems and fruits should be removed outfrom grapevines infected with pathogens in the vineyards.
Abstract
BACKGROUND: The white stain symptom of grapeclusters and canes by dust-like particles occurred in manyvineyards recently. This study was conducted to investigatethe ecological characteristics of white stain symptom ingrapevines and vineyards. METHODS AND RESULTS: Optimal climate conditionfor white stain symptom was 25℃∼30℃ with 60% ofhumidity. Moreover, closed condition with same humidityshowed higher incidence rate of white stain symptom thanventilation condition. Grape varieties with black berry skinsuch as Campbell-Early and Kyoho were more sensitive towhite stain symptom compare to varieties with green andred berry skin. Although the pathogens were not detecteduntil March, they increased from April, and increasedsharply from mid of July. The pathogens may overwinter inthe infected stems and/or on the bark as a mycelium. According to the increase of sugar content of grape fromAugust to September, the mycelium which was parasitic onthe bark grew to move to the fruits through the stems, andfinally reached the fruit stalk to detach berries from theclusters. CONCLUSION: Well ventilation is recommended insidethe vineyard since mid-July with roll up an insect net. Inaddition, infected stems and fruits should be removed outfrom grapevines infected with pathogens in the vineyards.
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