62 NEW YORK STATE MUSEUM 



be determined by examining the trees during the. fall or winter 

 for the characteristic brown egg belts about half an inch long, 

 encircling the smaller twigs. Wherever these are numerous there is 

 very good prospect of serious depredations another season. The low 

 value of timber and land in the Adirondacks precludes the adoption 

 of comprehensive measures for the control of the pest. This does 

 not apply to the more highly valued holdings in the vicinity of 

 New York City and in such places it may be advisable to make 

 provision for early spring spraying of the woodland areas where 

 the eggs of this insect are numerous. The work against the gipsy 

 moth in eastern Massachusetts has shown that fairly open wood- 

 land can be sprayed at the very moderate cost of $6.50 an acre 

 with the modern high pressure outfit so extensively used in eastern 

 Massachusetts. This equipment, while costly, is really the most 

 economical where areas of any size are to be sprayed, since the 

 high power and special nozzle renders climbing unnecessary and 

 thus effects a great saving in time. 



Locust borer (Cyllene robiniae Forst). Injuries by 

 this common borer have attracted an unusual amount of attention, 

 and local investigations disclosed serious damage. It is rare to 

 find any number of black locust trees in New York State not 

 infested by this borer though, as a rule, the damage is confined 

 largely to dying branches and the deforming of old trees. 



The past season our attention was called to a hedge row at 

 Salamanca so badly infested that a number of young trees broke 

 off in moderate to high winds. Investigations on Long Island 

 showed numerous trees with limbs killed by this insect. A more 

 serious condition was noted east of Poughkeepsie, in that here and 

 there good sized trees had apparently succumbed to the activity of 

 this pest, while many others were in more than the usual bad 

 condition. The most striking injury was at Millbrook where nearly 

 one acre of young transplanted locusts had been killed, probably 

 the present year, by this insect. The trunks ranged in diameter 

 from 1 to 2y 2 or 3 inches and were repeatedly girdled and well 

 riddled by the galleries. There were a few larger trees with a 

 diameter of 4 inches or over in this area which were not very 

 seriously affected. The general killing of these trees was evidently 

 due to an unusual increase in the borers and, as a consequence, 

 the numerous larvae were literally compelled on account of the 

 lack of space to girdle the trees repeatedly in making their galleries. 

 The outbreak was evidently one of those periodic increases in the 



