30 



NEW YORK STATE MUSEUM 



Treatment: capture the butterflies with nets. Spray young 

 cabbage with poison, older ones with hellebore or pyrethrum 

 water. Dust with lime. 



60 Cabbage thrips (T h r i p s t a b a c i). Cabbage and lettuce 

 frequently show white spots as though blasted, caused by minute 

 yellowish or brown insects. These little creatures are scarcely 

 visible to the unaided eye. 



Treatment : spray affected plants at the beginning of the trouble 

 with kerosene emulsion or a soap solution. 



Fig. 52 Rhubarb curculio: a adult beetle; c newly hatched larva; (Z full-grow larva; e pupa — all 

 about twice natural size (after Chittenden, U. S. dep't agr., dlv. ent., bull. 23, n. s.) 



61 Rhubarb curculio (Lixus concavus). Wilting rhubarb 

 leaves and punctures in the leaf stems are usually caused by a 

 nearly cylindric, black, extremely ^^ hard shelled " beetle with 

 more or less of a golden bloom on it. The grubs burrow in the 

 stems and leaf stalks of dock as well as of rhubarb. 



Treatment: the beetles can be collected and 

 destroyed by hand whenever injurious. They 

 are abroad in June. 



62 Tarnished plant bug (Lygus prate n- 

 s i s). Small yellowish and black bugs about 

 1 inch long, frequenting many plants and in- 

 juring most garden crops and some trees. A 

 most serious injury by this pest is the exten- 



■11,. p TIT LI Fig. 53 Tarnished plant 



sive blastmg of peach buds on nursery stock, bug (after miey) 



