GENERAL CROP PESTS 65 



siderably. It is polished black with white stripes. A common 

 dark form is shown in figure 35. 



METHODS OF CONTROL 



Arsenicals and Bordeaux mixture. — The best remedies for 

 leaf-beetles and flea-beetles are Paris green or other arsenical 

 and Bordeaux mixture, either in combination or separately. 

 Bordeaux mixture alone acts as a deterrent, and the writer sug- 

 gests that instead of using either one separately, or both in 

 combination, that the greater portion of an infested field or 

 garden be sprayed with the Bordeaux mix- 

 ture freely and as often as may be nec- 

 essary, particularly after heavy rains, 

 while strips here and there be sprayed ex- 

 clusively with Paris green. This will 

 have the effect of driving the beetles from 

 the Bordeaux-sprayed plants to the poi- 

 soned ones. Paris green alone, dusted dry 

 on infested plants, is thoroughly effective 

 against many species. Arsenate of lead 



. ,, . . , Fig. 35.— Banded flea-beetle, 



is preferable for spraymg tender dark variety. (Author's ii- 

 plants like beans, whose foliage is lustration, u.S.Dept.Agr.) 

 liable to scorching. Plants like to- 

 mato, eggplant, and cabbage that are started under glass and 

 that are liable to flea-beetle attack, should be dipped in a 

 solution of Bordeaux mixture and Paris green or lead arsenate 

 before transplanting. For direction see page 55. 



Kerosene emulsion and soap washes, even strong soap-suds, 

 have been used with profit in combating some flea-beetles. 



Pyrethrum, dry, mixed with flour or road dust, may be em- 

 ployed for small gardens. 



Cultural methods. — In the protection of young plants knowl- 

 edge of the fact that the larvae of many species subsist by 

 preference on weeds must be remembered, and the grower 

 should, moreover, familiarize himself with the particular natural 



