430 



Journal of Agricultural Research 



Vol. VI, No. II 



tion of a dust insecticide to prevent the total destruction of the plants 

 by striped cucumber beetles. 



The relative amount of control given by the three kinds of spray mix- 

 ture tested is shown in figure 2, in which the number of wilted plants in 

 each sprayed and check plot is given. It will be noted that the lead arse- 



32 

 1:520 



FIELD N0.1 



Bordeaux and lead 



— Borcfesi/x A/o/7e 

 Lead A/one 



Fig. 2. — Comparison of relative wilt control of Bordeaux mixture plus lead arsenate, Bordeaux mixture 

 alone, and lead arsenate alone in field i. East Marion, Long Island, season of 1915. 



nate and Bordeaux mixture combined gave better results than either used 

 alone. 



The results obtained in field 2 are corroborative of the data graphically 

 shown for field i (fig. 2 and 3), but the control effected was not quite so 

 striking, since the plants were nearly a week older than those in field i at 

 the time of the first spraying. Furthermore, the stand was poor in some 



