【摘要】 在云南省玉溪市红塔山自然保护区云南松受松纵坑切梢小蠹虫轻中度危害区域内选择3个不同地点设置样地,分别于2005年9月及2006年4月进行了2次打孔注药试验.结果表明:打孔注药在9月份时防治效果明显,在4月份时防治效果不明显.更多还原

【Abstract】 Samples were set up in selected three locations where were moderately suffered from Tomicus piniperda of Pinus yunnanensis.Twice tests on injecting by holes-drilling were conducted in September of 2005 and April of 2006 respectively.The result showed that the effect for the prevention was obvious in September,whereas that was not so in April.更多还原