48 



NEW YORK STATE MUSEUM 



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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 

 building 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 feeding 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 intervals of a day or two till the 

 trees are comparatively free from the 

 pests. The 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 

 Fig. 5 Egg belt assemble in large masses on the lower 



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a few exposed ' molting. At this time, they may also be 



eggs, enlarged. o j j j 



brushed down or forced to drop by the 

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

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

 be removed and destroyed at these times. 



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Fig. 4 Egg belt 

 of forest tent cat 



FALL WEB WORM 



Hyphantria cunea Drury 



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

 are frequently seen inclosing 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. 



