584 NEW YORK STATE MUSEUM 



Treatment : as the grubs of these beetles are known to feed on the 

 eggs of grasshoppers and are therefore beneficial, the adults should be 

 destroyed, by spraying affected plants with poison or by beating the 

 insects into pans containing water and kerosene, only when necessary. 



50 Bumble flower beetle (Euphoria inda). Brownish mot- 

 tled beetles about ^ in. long feeding in ears of green corn, attacking 

 peaches. 



Treatment : handpicking. 



51 Stalk borer (Hydroecia nitela). Wilting potato vines 

 and within a brown, white-striped active caterpillar about i in. long. 

 Attacks many thick stalked herbaceous plants. 



Treatment : burn infested stalks before September. 



52 Variegated cut worm (Peridroma saucia). Stout, 

 brownish cut worms with obscure markings and about 1)4 in. long. In- 

 jurious to various garden plants. Its operations on carnations in a 

 greenhouse are shown. 



Treatment : place poisoned baits near plants to be protected. 



53 Zebra caterpillar (Mamestra picta). BrilHantly marked 

 black and yellow, red-headed caterpillar about 2 in. long frequently 

 found on cabbage, beets and other garden crops. 



Treatment : spray affected plants with poison, hellebore or pyrethrum 

 water. 



54 Cabbage butterfly (Pieris rapae). Large irregular 

 holes eaten in cabbage by a greenish caterpillar. White butterflies 

 abundant in the field. 



Treatment : capture the butterflies with nets. Spray young cabbage 

 with poison, older ones with hellebore or pyrethrum water. Dust with 

 lime. 



55 Cabbage thrips (Thrips tabaci). Cabbage and lettuce 

 show white spots as though blasted, caused by minute yellowish or brown 

 insects. 



Treatment: spray affected plants with kerosene emulsion or a soap 

 solution. 



56 Tarnished plant bug (Lygus pratensis). Small yellow- 

 ish and black bugs about j^ in. long, frequenting many plants and 

 injuring most garden crops and some trees. 



