48 



NEW YORK STATE MUSEUM 



operation is too great, something may be done by jarring the caterpillars 

 from the trees, first applying a broad sticky band, e. g., tar on thick 

 buil' ling paper, tangle foot fly paper, etc., or a band of loose cot- 

 ton around the trunk so as to prevent the dislodged enemy from 

 ascending. The jarring can be performed best on a bright day when 



the caterpillars are feedi ig on the leaves, 

 as they are then much more easily dis- 

 turbed. Send a boy into the tree with a 

 padded mallet with instructions to begin 

 near the top and jar the depredators from 

 the limbs. Those hanging persistently 

 by long threads may be swept down with 

 a pole. Kill the caterpillars as they as- 

 semble below the sticky band in order 

 to guard against their bridging it when 

 present in numbers, and repeat the jar- 

 ring at inteivals of a day or two till the 

 trees are comparatively free ftom the 

 pests. Ihe caterpillars of the white 

 marked tussock moth can also be 

 treated in this manner. Many forest 

 tent caterpillars can be killed by spray- 

 ing with kerosene emulsion when they 

 assemble in large masses on the lower 

 limbs and trunks for the purpose of 

 molting. At this time, they may also be 

 brushed down or forced to drop by the 

 judicious use of a torch. Apple tree tent caterpillars, on account ol 

 their remaining during damp or cold weather in their webs, can easily 

 be removed and destroyed at these times. 



Fig. 4 Egg belt 

 of forest tent cat- 

 erpillar, showing 

 a few exposed 

 eggs, enlarged 



F i£- 5 Egg belt 

 of apple tent cater- 

 pillar, enlarged. 



FALL WEB WORM 



Hyphaiitria cunea Drury 



During the latter part of August in this latitude, conspicuous webs 

 are frequently seen nclosing the tips of branches of many trees, each 

 web containing brown skeletonized leaves. This is the work of the fall 

 web worm and may be easily distinguished from that of the apple tree 

 tent caterpillar not only because they occur later in the season but the 

 tips of the branches are inclosed and the caterpillars feed within the 

 webs, while those of the common apple tree species use the web only as 

 a retreat when not feeding. 



