【摘要】 在辽宁章古台地区,通过野外观测松沫蝉Aphrophora flavipes Uhler若虫的耗水量、虫口密度及不同松树树种受害情况,研究松沫蝉的耗水及其危害。结果表明:06:00—18:00松沫蝉2~4龄若虫的耗水量最大,平均为每千头耗水800~1000 g,1龄若虫次之,5龄若虫最小。松沫蝉在樟子松Pinus sylvestris var.mongolica和赤松P.densiflora上的虫口密度没有显著差异,显著大于在油松P.tabulaeformis上的虫口密度。赤松和油松承受松沫蝉危害的能力较强,没有发生枝梢枯黄的现象,樟子松承受松沫蝉危害的能力弱,且林龄越大受害越重,36年生和44年生的新生梢枯死率分别为25.2%和42.7%。樟子松受害轻时,枯黄的嫩梢在树冠上呈斑点状分布;受害重时,从顶梢逐渐向下枯黄,有的整株死亡,且林缘比林内受害重。樟子松受害严重的原因应该是松沫蝉和松枯梢病(Sphaeropsis sapinea)的双重危害。更多还原

【Abstract】 Field observation was carried out in Zhanggutai,Liaoning province to study population density and sap consumption of Aphrophora flavipes,and its damage to different species of pines. The results showed the 2nd to 4th instar nymphs of the insect had highest sap consumption,i. e. 800 to 1000 g /12 h per thousand insects on average,and the 1st instar nymphs had higher sap consumption than the 5 th instar nymphs. The population density of A. flavipes in the trees of Pinus sylvestris var. mongolica had no difference with that in P. densiflora,and the population density in the both species was significantly higher than that in P. tabulaeformis. No shoot wilt occurred on P. densiflora and P. tabulaeformis due to their strong endurance to A. flavipes damage. Damages to P. sylvestris var. mongolica were obvious for its lowendurance. The older trees of P. sylvestris var. mongolica were more susceptible to A. flavipes,and the new-shoot-blight rates of 36 and 44-year-old trees were 25. 2% and 42. 7%,respectively. Yellowshoots of P. sylvestris var. mongolica trees lightly damaged scattered in the crown,and trees heavily damaged became yellow,withered gradually from top to bottom and even died,and much heavier losses were found along stand edges of the pine forests. The combined damage of A. flavipes and Sphaeropsis sapinea might be the major reason for the eventual damage of P. sylvestris var. mongolica.更多还原