INJURIOUS AND BENEFICIAL INSECTS 



29 



Fig. 49 Variegated cut worm: a larva; h and c 

 segments of the same enlarged; d moth (after Riley) 



57 Variegated cut worm (P e r i d r o m a s a u c i a). This is a 

 stout, brownish cut worm about IJ inches long, with obscure 

 markings. It is very injuri- 

 ous to various garden 

 plants. Its operations on 

 carnations in a greenhouse 

 are shown. The adult is an 

 obscurely colored brownish 

 moth. 



Treatment: place poi- 

 soned baits near plants to 

 be protected. 



58 Zebra caterpillar (M a- 

 m e s t r a p i c t a). Bril- 

 liantly marked black and yellow, red headed caterpillars about 



2 inches long are fre- 

 quently found on cab- 

 bage, beets and other 

 garden crops. These 

 handsome caterpillars 

 are general feeders, 

 and occasionally are 

 found in very large 

 numbers. The moth 

 is marked with deep 

 shades of brown. 

 There are two broods 



Fig. 50 a zebra caterpillar; b its moth (after Riley) nnnnflllv' 



Treatment: spray affected plants with poison, hellebore or 

 pyrethrum water. 



59 Cabbage butterfly (P i e r i s 

 r a p a e). The large irregular 

 holes eaten in cabbage by a 

 greenish caterpillar are usually 

 the work of this insect. The 

 white butterflies are frequently 

 very abundant in the field. A com- 

 mon and widely distributed posf. ^H^) '' ^^"''^^"'^"^ '"'^*^"'"^' '•"""'^' ''''''' 



