EXPERIMENT STATION BULLETINS. 



165 



in patches, either on the upper or 



under surfaces of the leaves, after 

 wliich the remainders of 

 the patches dry up and 

 fall out leaving unsightly 

 holes which increase in 

 size as the leaf expands. 



REMEDIES. 



Fig. ll.-Pale, striped flea-beetle, euiarged. (Author's 



fore applj^ng. Clean culture and 

 the destruction of all rag-weed, 

 pig-weed, etc., in the fence cor- 

 ners, will tend to starve out this 

 pest in common with many 

 others. 



The Triangle Flea-beetle {Disonycha 

 triangularis) 



The triangle flea-beetle is so 

 named because of the three dark 

 round spots placed in a triangu- 

 lar position on the orange pro- 

 thorax. In size, this beetle 

 varies from about three-six- 

 teenths to one-fourth of an inch. 

 It is blue-black in color with the 

 exception of the orange pro- 

 thorax before mentioned. It has 

 the strong, jumping hind legs of 

 its family. It wDrks on the beet 

 primarily, and is controlled by 

 the same measures that govern 

 the pale, striped flet-beetle. In 

 fact it is usually found in com- 

 pany with the latter insect. 



Spray with paris-green 

 and bordeaux, using one 

 pound of the poison to 

 175 gallons of the bor- 

 deaux, made in the ordi- 

 nary way. The bordeaux 

 is useful against this ahd 

 manj' other flea-beetles, 

 acting as a repellant 

 rather than as a poison. 



Dusting with dry-slak- 

 ed lime and paris green 

 should prove very ef- 

 fective as all flea-beetles 

 dislike limo. Use one 

 part of the poison to one 

 illustration.) hundred of the lime and 

 mix very thoroughly be- 



Fig. 12. — Triangle Flea-beetle, enlarged. (Author's 

 illustration.) 



