云南橡胶树及热带果树常见病原寄生植物的初步调查

云南橡胶树和杧果、柚子、柑桔等热带果树常见病原寄生植物有三种:1 五蕊寄生Dendrophthoe pentandra(L.)Miq.;2 卵叶梨果寄生Scurrula chingii(Cheng)H.S.Kiu.;3 瘤果槲寄生Viscum ovalifolium DC.。根据在西双版纳的调查,橡胶树平均被寄生率为4.99％,严重林段达75％,杧果树平均被寄生率52.7％,柚子树平均被寄生率74.2％,柑桔类树平均被寄生率83.2％。对柚子树的寄生植物采取切除措施,可收到比较好的效果,对橡胶树的病原寄生植物切除处理效果也较好。

A PRELIMINARY INVESTIGATION ON COMMON PATHOGENIC PHYTOFARASITES OF RUBBER TREES AND TROPICAL FRUIT TREES IN YUNNAN

There are three common pathogenic phytoparasites of rubber trees and tropical fruit trees such as mango, pomelo, citrus, etc. in Yunnan, namely: Dendrophthoe pentandra (L.) Miq.(1856),Scurrula chingii (Cheng) H. S.Kiu, and Viscum ovalifolium DC.(1830) Danser (1941). The investigation in Xishuangbanna showed that, on the average, 5.0% of rubber trees and up to 74.2% in serious rubber stands. 52.7% of mangoes, 74.2% of pomelos, and 83.2% of citruses are parasitized. It the removal of pathogenic phytoparasites of pomelos and rubber trees is carried out, better results can be acchieved.