260 



INJURIOUS INSECTS 



ment, and induce a weakly condition which results in 

 poorly developed fruit. They attack the thin-leaved va- 

 rieties in preference to those with more robust foliage, 

 such as the Concord, and vines of that class. Occasion- 

 ally they cause much annoyance by attacking the exotic 

 vine under glass. The Leaf-hopper seems to be more 

 abundant at the East than at the West, and in some sea- 

 sons is very numerous in the vineyards of Western New 

 York. It has been suggested to destroy the young insect 

 by fumigating with tobacco smoke, using a movable tent 

 to cover the trellis and confine the smoke. When the 

 insect can fly, it may be destroyed by carrying lighted 

 torches through the vine-yard, though at this time most 

 of the mischief has been done. 



THE CRANBERRY. 



Several insects are injurious to the Cranberry, but as 

 these are treated of in full in the standard works on the 

 culture of this fruit, and as they are of interest only to a 

 comparatively small number of persons, a brief enumera- 

 tion is all that need be given here. The conditions under 

 which Cranberry culture only can be successful — the 

 ability to flood the plantation with water, and to draw it 

 off at will — are those which afford a remedy against 

 nearly all of these insects. Flooding at the right time 

 will allow the cultivator to destroy the insects that attack 

 the vines, as well as those that injure the fruit. 



The Vine-w^orm is the larva of a moth {Anchylopera 

 vacciniana) which feeds upon the foliage. In Massachu- 

 setts, it hatches about tlie 20tli of May, from eggs which 

 have remained on the vine during the winter, and again, 

 about the 4:th of July, a second crop appears from eggs 



