2 ae Se, ee eae At pt ae 
UNITED STATES DEPARTMENT OF AGRICULTURE 
FARMERS 
BULLETIN 
Wasuineton, D.C. Tae JUNE 26, 1916 
Contribution from the Bureau of Entomology, L. O. Howard, Chief. 
THE CLOVER LEAFHOPPER' AND ITS CONTROL IN 
THE CENTRAL STATES. 
By EpmMunp H. Grsson, 
Scientific Assistant, Cereal and Forage Insect Investigations. 
INTRODUCTION. 
The control of the injurious clover leafhopper (fig. 1) is a com- 
paratively simple task to one acquainted with the habits of the insect. 
Fic, 1.—The clover leafhopper (Agallia sanguinolenta) : a, Adult: b, nymph, side view; 
c, nymph, dorsal view; d, face; e, elytron; f, female genitalia; y, male genitalia. AW 
enlarged. (After Osborn and Ball:) 
The injuries caused by this insect, as is the case with many other 
leafhoppers, are often overlooked because of the minute size of the 
pest, and the apparent injury is too frequently attributed to such 
causes as poor soil and climatic conditions. 
1 Agallia sanguinolenta Prov. ; suborder Homoptera, family Bythoscopidae. 
Notr.—It is the purpose of this bulletin to set forth such facts as will familiarize the 
farmer with the various stages in the development of the clover leafhopper, its habits, and 
mode of attack, together with detailed information as to the control of outbreaks in alfalfa 
and clover fields. 
38508°—Bull. 737—16 
