不同园林树种对美国白蛾的抗性差异研究

通过对天津市南开区某居住区绿地园林树木遭受美国白蛾为害严重度的调查,发现了各树种对美国白蛾的抗性存在明显差异。该居住区24种园林树木中,对美国白蛾抗性强的树种有12种,分别为:刺槐(Robinia pseudoacacia)、木槿(Hibiscus syriacus)、合欢(Albizzia julibrissin)、大叶黄杨(Euonymus japonicus)、金叶女贞(Ligustrum vicaryi)、石榴(Punica granatum)、龙爪槐(Sophora japonica cv.Pendula)、紫薇(Lagerstroemia indica)、枣树(Ziziphus jujube)、柳树(Salix spp.)、碧桃(Prunus persica)、李子(Prunus salicina);另有12种被害指数在2.78%～63.75%。其中,抗性较强的树种有:紫叶李(Prunus cerasifera var.atropurpure)、杏树(Prunus armeniaca)、梨树(Pyrus spp.)、海棠(Chaenomeles cathayensis)、火炬(Rhus typhina);中等抗性的有:柿树(Diospyros kaki L.)、杜梨(Pyrus befulaefolia Bunge)、凌霄(Campsis grandiflora Loisel)、杨树(Populus spp.);抗性弱的树种有:白蜡(Fraxinus chinensis)、臭椿(Ailanthus altissima)、金银木(Lonicera maackii Maxium)。

Study on Insect-resistance Discrepancy of Different Garden Tree Species to Hyphantria cunea Drury

An investigation of the garden trees which were seriously damaged by Hyphantria cunea Drury was made in the dwelling coumunity Nankai district in Tianjin,China.The results showed that resistance of 24 tree species had visible discrepancy.12 trees species which were high resist to H.cunea Drury were Robinia pseudoacacia,Hibiscus syriacus,Albizzia julibrissin,Euonymus japonicus,Ligustrum vicaryi,Punica granatum,Sophora japonica cv.Pendula,Lagerstroemia indica,Ziziphus jujube,Salix spp.,Prunus persica,Prunus salicina ;the other 12 tree species whose murdered index varied from 2.78% to 63.75% had different resistance.Among the latter 12 tree species,Prunus cerasifera var.atropurpure,Prunus armeniaca,Pyrus spp.,Chaenomeles cathayensis,Rhus typhina had better resistance,while Diospyros kaki L.,Pyrus befulaefolia Bunge,Campsis grandiflora Loisel,Populus spp.with moderare resistance and Fraxinus chinensis,Ailanthus altissima,Lonicera maackii Maxium had nearly no resistance to Hyphantria cunea Drury.