| 摘要: |
| 套袋苹果黑点病是苹果套袋后产生的一种新病害，严重影响优质苹果生产。对此病害的病菌及其与果园海拔高度、育果袋质量、结果部位的关系进行了研究。结果表明，套袋苹果黑点病是由真菌粉红聚端孢霉(Trichothecium roseum LK.ex Fr.)引起的。套袋苹果黑点病在海拔l 000 m以上的果园发病轻，海拔l 000 m以下的果园发病重；用透气性好、表面吸水性弱、柔软、抗张性好的育果袋发病轻，反之发病重；另外在树冠的不同部位发病情况也不一致，树冠的中部发病重于下部，下部重于上部。 |
| 关键词: 套袋苹果 黑点病 育果袋 海拔高度 |
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| 基金项目:陕西省自然科学基金资助项目(99SM26) |
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| Studies on the occurrence of black-dot disease of bagged apple |
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| Abstract: |
| Black-dot disease of bagged apple is a new disease for apple bagging,and harmful to produce high quality apple.The germ of the disease and relation to elevation,bag’s quality,the position of fruits were investigated.The result showed that the germ of black dot disease of bagged apple was Trichothecium roseum Lk.ex Fr..Apple orchards over an elevation of 1 000 metres had smaller disease occurence rate than those below an elevation of 1 000 metres.The disease was also related to different apple bags.It had a tendency that there were smaller disease occurence rate in apple orchards of using the bags which had good property of ventilation and anti-tension,bad property of absorbing water in surface,and were soft than the others.In addition,the different parts of apple trees had different disease occurence level.In the middle part of apple tree it’s the most serious,and then in the bottom,and in the top of the tree it’s the lighest. |
| Key words: bagged apple black-dot disease bag altitude |
