MEXICAN BEAN BEETLE IN THE SOUTHEAST. 



33 



arranged by insecticides. Table 13 gives results of spray experi- 

 ments arranged by insecticides. The infestation was not as severe 

 as in 1921, and comparisons between experiments must take into 

 consideration the degree of infestation. 



Fig. 13. — Spraying beans against the Mexican bean beetle with a wheelbarrow sprayer mounted 



on a slide. 



In comparing results with different insecticides, the plant-injury 

 factor as well as the insect-control factor must be taken into con- 

 sideration. The plant-injury factor is apparent in yields harvested 



Fig. 14. — Spraying small field beans with a hand sprayer to control the Mexican bean beetle. 



men infestation is light, but in some cases does not show, except by 



jomparison, when yield is heavy. The notes taken during the experi- 



Lents showing observations of visible injury give very accurate data 



80333°— 24f 3 



