INSECTS INJURIOUS TO TOBACCO 



219 



Paris green, which is applied in dust form without a carrier, 

 is used at the rate of from 1 to 2 pounds per acre. 



Fig. 183. Hibernation of southern tobacco-worm ;c, pupa in hibernating cell in 

 soil, at the depth of which pupation usually takes place in the stiff er soils; 

 a, cross-section of pupal cell viewed from below; b, pupal cell showing 

 entrance hole of larva two-third natural size; (After A. C. Morgan, 

 U. S. Dept. Agr.) 



Arsenate of lead is safe and effective during rainy weather, 

 whereas Paris green is dangerous and ineffective. 



