西双版纳橡胶树死皮病症状调查

调查西双版纳RRIM600和GT1两个品种橡胶树的不同割龄段死皮树的症状,根据排胶、割线颜色、树体状况三个方面的症状表现,死皮病典型症状可归纳为点状排胶或割线干涸,割线褐色、暴皮三种表现,其中RRIM600死皮树表现割线干涸和点状排胶的分别为41.7%和45.3%,割线表现内褐、褐皮平均分别为42.7%和35.2%,树体多数表现为块状暴皮,平均达44.8% GT1死皮树症状以割线干涸为主,占61.9%,其次为点状排胶,占23.9%,割线表现为褐皮、内褐的分别占29.5%和44.9%,树体多数表现为短裂纹状暴皮,平均达34.1%。文章还对死皮病病程、诱因进行探讨。

Investigation on Tapping Panel Dryness in Xishuangbanna

Investigation on tapping panel dryness of two rubber clones RRIM600 and GT1 was carded out in Xishuangbanna. The results showed that latex would flow a drop at a time and tapping panel getting dry in brown cracking according to its symptoms in affected tree. Of two tested clones, it reaches 41.7 % and 45.3 % respectively with TPD and latex droppings in clone RRIM600, brown bark and inner brown bark on panel averaged 42.7 % and 35.2 %, most of the affected trees showed bark-cracking in a percent of 44.8. Clone GT1 has more panel getting dry accounts for （61.9%） under TPD condition, then is the latex droppings（23.9 %）. It would be 29.5% and 44.9 % respectively with brown bark and inner brown bark on panel, most of the affected trees showed bark-cracking, it averaged 34.1%.