44 INSECTS OF ECONOMIC IMPORTANCE 



Control — In addition to above, use the jarring 

 method. 



White-marked tussock moth ^* (Hemcrocampa 



I c II CO stigma') 



Order — Lepidoptera. Manual, p. 310 



Lays eggs in July on cocoons and covers them 

 with a white frothy substance; remain here all 

 winter and hatch latter part of May; the cater- 

 pillar has two long pencils of hairs just back of the 

 head, a single similar tuft on the posterior end of 

 the body, and four tufts of short white hairs on the 

 back; they feed on leaves and fruit for four weeks 

 and then pupate in cocoons for 10 to 14 days; the 

 adult wingless female deposits eggs on cocoons; 

 male is winged. 



Apple, pear, quince, plum, elm, maple and other 

 deciduous trees are attacked. 



Control — Collect tgg clusters; spray with ar- 

 senate of lead 3 pounds to 50 gallons; jar trees for 

 caterpillars ; band trees for larvae. 



• The apple maggot ^^ (RJiagoIcfis pomoncUa) 

 Order — Diptera 

 The flies begin to emerge in the latter part of 

 June and continue through July and August. 

 Within 10 days to 2 weeks the females thrust their 

 eggs just beneath the skin of the apple, causing a 

 dimple at each insertion. The eggs hatch in 2 to 6 

 days and the white maggots tunnel through the 

 apple causing it to drop and decay. In about 30 

 days in soft apples the maggots become grown and 

 then go into the soil from i to 3 inches and pupate, 

 where they usually remain until the next spring. 

 There may, however, be a partial second brood in 



14 Schoene— N. Y. State Expt. Stat, Bull. 312. 



15 Illingworth — Cornell Univ. Expt. Stat., Bull. 324. 

 Herrick — Cornell Univ. Expt. Stat., Bull. 402. 



