CHAPTER VII 



INSECT PESTS 

 THE SWEET PEA APHIS 



Macrosiphum pisi Kalt. 



Of all the sweet pea insects, not one 

 perhaps rivals in economic importance the 

 green aphis. Specimens were submitted 

 to Professor Chittenden of the United 

 States Department of Agriculture, who 

 identified them as M. pisi Kalt. Since 

 this pest is the same which also attacks the 

 garden and field pea we will quote in part 

 Professor Chittenden.^ 



Description. "The pea aphis is one of 

 unusual size among those found infesting 



* Chittenden, F. H., The pea aphis (Macrosiphum 

 pisi Kalt.) U. S. Dept. Agr. Bur. of Entomol. Circ. 43 

 Second Edition, 1909. 



152 



