【摘要】 自1984年以来对20a生红松(Pinus koraiensis)人工林疤锈病(Cronartium ribicola)进行了综合防治技术的研究。在该病发生发展规律研究基础上,对发病率为16.9％的重病林分,采取间伐、修枝和药剂防治等进行综合防治;其间伐强度20—30％,保留密度约1700株/ha,修除1.5m以下侧枝,松焦油涂柴油(1∶1)涂干防治保留的轻病株。防治后3a,林分发病率降至4％,林分蓄积生长量显著增加,防治效益显著。更多还原

【Abstract】 The study dealt with integrated control of blister rust (Cronartium ribicola J. C. Fisch) on Pinus koraiensis Sieb et Zucc. in a 22-year-old plantation in Heilongjiang province. Integrated control was carried out by using pruning, thinning and fungicides according to disease severity, growth and treatment cost, based on studying of regularities of occurrence and development of this disease.The results of pruning off up to 1.5 meter, thinning levels at 20m 30% (residual stocks 1700 stem/ha), smearing with pine tar and diesel oil (1∶1 by volume) onto infected infected trees whose disease degree is lower after 3 years, controlling, disease incidence of forest stand lower than 4% much more trees growing both in volume and diameter.更多还原