红脂大小蠹危险性实地调查与灾前管控策略

Experimental Study on Effective Pre-endanger Contral Technology for Dendroctonus valens LeCont

实地调查发现红脂大小蠹在河北承德表现出明显的弱寄生性,在新侵入地初侵染均选择新伐根、过火木、移栽大树、古松等衰弱木,繁殖一代后在无上述衰弱木时再危害周围的健康树。在防控策略上首先应该加强新伐根、过火木等衰弱木管控,严防红脂大小蠹种群在其上定殖和繁衍后转移危害健康树,从而实现灾前管控灾害的目的。

It is founded through the field survey that the Dendroctonus valens has obvious weak parasitism in Chengde of Hebei province.At the beginning,the damage in the new invade area happens to the newly cut roots,fire-damaged woods,transplanted trees and aged-old pine trees and so on,they do harm to other healthy trees when there are no above mentioned weak trees after breeding one generation.For the control and prevention for the Dendroctonus valens,it is important to strengthen the management of the newly-cut trees and fire-damaged woods,preventing the Dendroctonus valens's population settle and reproduce on the above mentioned trees and transfer to the healthy trees,to realize the aim of management and control before the hazard.