6o 
PEPPER GROWING IN UPPER SARAWAK. 
Disease. 
So far as is generally known there are three flying 
insects which attack pepper vines, and one bad ground 
grub. The former are common, and their ravages are 
checked by an application of Tuba Solution and Tobacco, 
used two or three times at intervals of four to seven 
days. In bad cases four applications have been found 
necessary. The mixture is sprayed over the vines, both 
underneath and on the top of the leaves and flowers, as the 
latter are forming. 
The ground-grub attacks the roots and I believe can 
only be destroyed by opening up the roots and killing the 
individuals wherever found. 
A dying back of vines, often on one side only, 
can doubtless be put down to fames , which the gardeners 
cure by scarification and fully exposing the attacked 
roots to the sun for one to four weeks. 
