我分场(在打洛地区),一九六一年开始植胶,一九六五年在苗圃和林地发现少数植株发生紫根病后,病害随着胶树的成长而逐步发展,现已成为打洛地区发展橡胶的主要障碍。我分场现有胶林大部分是经过七三—七四,七五—七六年两次特大寒害后保留下来的,一般说来,寒害对它影响不大,但有可能被紫根病毁掉。一九七九年九月调查(随机法),三个主要植胶的生产队,共1,850株开割胶树发病 I started the break-up (in the Daluo area) and began to plasticize in 1961. After the discovery of a few root-purging diseases in nurseries and woodlands in 1965, the disease progressed with the growth of gum trees and has become The main obstacle to the development of rubber in the Dalo area. Most of the existing rubber plantations in my sub-area have been preserved after two major chills in 1973, July 24 and July 5 to July 76. Generally speaking, the chilling injury has little effect on it but it may be destroyed by purplish roots Off In a survey conducted in September 1979 (Randomized Method), a total of 1,850 strains of cut gum trees were produced in three major plasticized production teams