.84 NEW YORK STATE MUSEUM 



those actually hit by the preparation. Small, badly infested trees 

 can be protected by jarring the insects into pans containing a little 

 kerosene and water. 



FOREST TREE INSECTS 

 White pine weevil (Pissodes strobi Peck). The depreda- 

 tions of this well-known insect are becoming of increasing importance 

 owing to its presence in large numbers in recent plantings. Two 

 years ago last spring, after consultation with the Entomologist, 

 Mr Waldo C. Johnston of Cooperstown began a systematic collect- 

 ing of the weevils on fifty acres set with about sixty thousand young 

 pines. The work was started a little late (about May 21st) and the 

 trees carefully collected over four times at intervals of approxi- 

 mately four or five days each. At the outset two to four weevils 

 were taken on a tree and toward the last only one or two insects 

 for each row of about four hundred trees. The cost of these four 

 collections amounted to $64 or only $1.28 an acre. An examination 

 made in early July of that year resulted in finding very few insects. 



Collecting along the same lines was continued during 19 14 and 

 the season of 1 9 1 5 . The latter part of last June Mr Johnston reported 

 that they had been able to collect comparatively few weevils this 

 past season and finally stopped work because a man would average 

 only one to four weevils after a good day's work. These figures 

 indicateja very large reduction in the numbers of the pests and 

 presumably mean practical extermination and comparative freedom 

 from injury for the entire planting. 



This method possesses the decided advantage of being positive in 

 action. There can be no question but that the weevils are destroyed, 

 though the expense may be somewhat greater than that of collecting 

 the infested tips or attempting to protect the trees by some spray 

 application. It can be practised most successfully only on consider- 

 able areas of small trees, conditions where it is usually most desirable 

 to check the pest. 



Ugly nest cherry worm (A re hips cerasivorana Fitch) . 

 The characteristic nests of this species were rather common in early 

 summer on chokecherry in southern Rensselaer county in particular, 

 and occasioned some apprehension for fear that the pests would 

 extend their operations to other trees. A well-developed nest of 

 this species was found June 16th by Mr C. B. Cutler at East Green- 

 bush, on Lombardy poplar, and on further examination it is pre- 

 sumable that the insects first defoliated some nearby chokecherry 



