Ijstjurious Insects and How to Control Them. 81 



54 Variegated cut worm {Peridroma saiicia). Stout, brownish cut worms 

 with obscure markings and about 1% iuclies long. Injurious to various 

 garden plants. 



Treatment: place poisoned baits near plants to be protected. 



55 Zebra caterpillar (Mamcstra picta). Brilliantly marked black and 

 yellow, red-beaded caterpillar about 2 inches long frequently found on 

 cabbage, beets and other garden crops. 



Treatment: spray affected plants with poison, hellebore or pyrethrum 

 water. 



56 Cabbage butterfly (Pieris rapw). Large irregular holes eaten in cab- 

 bage 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. 



57 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. 



58 Tarnished plant bug {Lygiis pratensis). Small yellowish and black 

 bugs about % inch long frequenting many plants and injuring most garden 

 crops and some trees. 



Treatment: handpicking or dusting with ashes. Burn all rubbish in the 

 fall. 



59 Four lined leaf bug (Poccilocapsus lineatus). Yellowish bugs with 

 four black stripes, about 5-16 inch long, frequenting various plants and 

 injuring some considerably. 



Treatment: dust affected plants with ashes. Spray young with kero- 

 sene emulsion. Cut and burn tips of bushes containing eggs. 



Grass Insects. 



CO Army worm (Leticania unipnncta). Brownish, white striped cater- 

 pillars about 2 inches long devouring grasses and allied plants. 



Treatment: confine by ditching, kill with poisoned baits. Prevent their 

 occurrence by clean culture. 



Gl White grubs {LacJi7WSterna fusca, Allorliina nitida). Fleshy, white, 

 brown-headed grubs severing grass roots and those of other plants. 

 AUorhina occurs in vicinity of New York city. 



Treatment: spray badly infested areas liberally with kerosene emulsion 

 just before a rain. Dig and destroy the grubs. 



02 Grasshoppers. A number of species attack various crops. 

 Treatment: place poisoned baits near crops to be protected. 



