IO 



Remedies: When germinating plants are threatened by aphid 

 attack, the liberal use of tobacco dust is considered advisable. 

 Tobacco dust is a cheap insecticide and is easily applied. 

 Mature plants should be sprayed with kerosene emulsion. 



Fig. 3— Cotton aphis, Aphis gossypi: Glov. a, winged female; aa, enlarged antenna of same 

 ab, dark female, side view, sucking juice from surface of leaf ; b, young nymph or 

 larva ; c, last stage of nymph ; d, wingless female. All greatly enlarged. CCopied 

 from ChittendenJ 



The introduction of the common parasites of the cotton 

 aphid from the United States seems entirely feasible, and could 

 only bring the most beneficial results.* 



* An effort is being made by this Station to secure aphid parasites 

 through the cooperation of the Bureau of Entomology, U. S. Depart- 

 ment of Agriculture. 



