274 



PESTS OF ORCHARD AN J) SMALL FRUITS 



Since the larvae are conspicuous and are not numerous, hand picking 

 is feasible. Arsenical poisons, such as Paris green or arsenate of 

 lead, may be used if desired. 



Fig. 389. — Larva of the Abbott's Sphinx. Original. 



The Plum-tree Sphinx (Sphinx drupiferarum S. and A.) 



Large, green caterpillars are sometimes in evidence on the foliage 

 of plum trees, devouring the leaves. They are naked worms, two 



inches or more in length, 

 the body marked on each 

 side with seven diagonal 

 dashes of narrow white 

 bordered with purple. 

 On the hind end is a 

 conspicuous spine. The 

 adults are strong-flying 

 moths, seen hovering 

 over flowers in the eve- 

 ning. The pupal stage is 

 passed in the soil. There is one generation annually. Hand picking 

 is the usual remedy, but arsenate of lead or Paris green may be used 

 on the fohage if desired. 



The False Army-worm (Calocampa nubera Lint.) 



In recent seasons, cranberry foliage has been severely injured by a 

 large caterpillar, two inches long when full grown, dark green in color, 



Fig. 390.— Adult Plum-tree Sphinx. Slightly 

 reduced. Original. 



