Occurrence and Reason of Valsa mali Miyabe et Yamada in Perennial Apple Kerf(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Occurrence and Reason of Valsa mali Miyabe et Yamada in Perennial Apple Kerf

Author(s):: ZHOU Jin-hua; GUO Jin-hong; LIN Ming-ji; WANG Qing-bo; ZHAO Duo-ren; Dongning County Fruit and Vegetable Management Station，Dongning,Heilongjiang 157200

Abstract:: Valsa mali Miyabe et Yamada occurs more and more serious all over Heilongjiang province.According to the survey，in the spring of 2012，diseased rate of rot was above 90% in seven apple orchards in Dongning，and the perennial kerf rot occurrence rate was very high.Kerf was the major part of the apple tree canker occurred，the more kerf rot disease occurred，the greater the kerf healing time and the decay rot disease occurrence probability was higher.So in the tree pruning，too big and too many kerf was not reasonable，and reasonable protective measures should be taken year after year if it had larger kerf.

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Last Update: 2014-08-30