【摘要】 调查和分析了松褐天牛Monochamus alternatus Hope的产卵刻槽在寄主植物黑松上的分布情况,结果表明:产卵刻槽分布与寄主胸径和树高有一定的相关关系,黑松树干胸径在9～15cm之间,树高在4～7m之间最适合天牛产卵危害,其中在胸径9～13cm范围内产卵刻槽数量最多,在此范围的寄主受天牛为害最重。天牛在胸径>17cm或树高>7m时,没有产卵刻槽分布。产卵刻槽集中分布于树干1～2m位置,3m以上很少有刻槽分布,同时,天牛产卵多在光线充足的地方,其中南面产卵刻槽数量最多。更多还原

【Abstract】 The Investigation and analysis on the distribution of oviposition scars of Monochamus alternatus in Pinus thunbergii Parl.The results showed that there is certain relationship between oviposition scars and trunk diameter or tree height.M.alternatus had the highest oviposition preference to trunk diameter of Pinus thunbergii in 9~15 cm and tree height in 4~7 m.While trunk diameter in 9~13 cm, the beetles deposited significantly more eggs.In this range, hosts are the most affected by M.alternatus.There are no oviposition scars when diameter of host greater than 17 cm or tree height greater than 7 m.there are more oviposition scars in the trunk 1~2 m, only a little scars in more than 3 m.At the same time, the beetles lay eggs in well-lit place, south of the trunk have the most oviposition scars.更多还原