Twelfth Report of the State Entomologist 261 



Injuries in Troy and Vicinity. 



The neighboring city of Troy, N. Y., six miles northward of Albany, 

 was visited August i8th for the purpose of observing the operations of the 

 elm-leaf beetle there and in the vicinity. It was found that the foliage 

 of most of the English elms throughout the city had been completely 

 skeletonized by the larvae of the first brood. From the western end of 

 Hyland avenue, commanding a view of a large portion of the city, the 

 brown, dead leaves could be seen in all directions, and gave the impres- 

 sion of an extensive destruction by fire. 



A closer examination of the condition of the English and Scotch elms 

 throughout the city, showed that the infestation and consequent damage 

 was fully as great as appeared from a general view. The elms every- 

 where were seriously injured, and in most instances the first crop of leaves 

 had been completely destroyed. It was learned that the insect had been 

 in the lower part of the city for years past — at least three. From this it 

 would appear that the beetles must have entered Troy in 1892, and 

 possibly earlier. The city had certainly suffered more from the insect 

 the past year than had Albany. 



The most badly infested region in Troy was between the Hudson river 

 on the East and Fifteenth street on the West, extending from near the 

 southern boundary of the city to Hoosick street on the north. The 

 southern end of Green Island and, on the western bank of the river, a 

 large portion of the city of Watervliet (formerly West Troy), was also 

 badly infested. The insect was found in limited numbers on the high 

 lands east of Troy, along Tibbets avenue, at Albia, and at Averill Park 

 in the town of Sand Lake, some seven miles southeast of the city. On 

 the north and west of Troy, signs of it in limited numbers were seen over 

 most of adjoining Lansingburg, and in portions of Cohoes and Water- 

 ford on the opposite side of the river. It had become established at 

 Menands, half way between Albany and Troy, in considerable numbers. 

 It had also been found by Dr. L. O. Howard, Entomologist to the U. S. 

 Department of Agriculture, at Mechanicville, about ten miles north of 

 Troy. 



Associated Insects. 



The elm-leaf beetle finds a very efficient ally in its destructive work in 

 the European Coccid, Gossyparia ultni (Geoff.), which is widely dis- 

 tributed over Albany, Troy and Watervliet. The insect was so numerous 

 on many trees that the leaves and branches were blackened by the fungus 

 growing in its abundant secretion to such an extent as to render them 

 conspicuous at a distance. Its occurrence in such numbers must weaken 



