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在油杉吉松叶蜂 (Gilpiniadisa)虫害常发区设标准地 ,通过观测云南油杉 (Keteleeriaevelyniana)受害植株的生长情况 ,寄主植物食源量对幼虫发育的影响 ,以探索两种群之间的相关性。其结果表明 :云南油杉从食源上制约着油杉吉松叶蜂幼虫的发育 ,当油杉吉松叶蜂 4龄幼虫在食源紧缺时 (寄主失叶量≥ 5 / 6 ) ,仅有 2 5 %的能正常发育 ;当云南油杉失叶量小于 1/ 3时 ,其高、径、材积呈增效生长 ;云南油杉具有极强的抗虫性 ,当它连续 3年 (每年失叶 1次 )严重受害失叶后 ,仍能存活 ,但如果 1年内连续两次严重受害失叶后 ,植株就会死亡 ;云南油杉受害失叶量≥ 1/ 3时 ,其高、径生长量、材积生长率随着受害程度增强而减小
The standard of pest occurrence in Gilpiniadisa was established by observing the growth of the damaged plants in Keteleeriaevelyniana and the influence of the host plant on the development of larvae in order to explore the correlation between the two groups Sex. The results showed that: the dominant species of P. oleifera larvae restricted the development of L. occidentalis larvae from the dietary sources. When the 4th instar larvae of L. crassifolia were in short supply (the number of host leaves was more than 5/6), only 2 5% could develop normally. When the amount of L. oleracea leaves was less than 1/3, the height, diameter and volume of P. oleifera had a synergistic growth. The P. oleifera was highly resistant to insects. When it lasted 3 years Leaves one time) can still survive if the leaf is severely damaged, but the plant will die if the leaf is severely damaged two times consecutively in one year; if the amount of leaf loss is ≥ 1/3, the height and diameter growth The volume and volume growth rate decreases as the degree of victimization increases