22 DECIDUOUS FKUIT INSECTS AND INSECTICIDES. 



vicinity of Euclid, Ohio. He also reported it as being very injurious 

 in vineyards on Kelleys Island, Ohio, in 1905. In 1906 it was 

 reported by H. A. Gossard and J. S. Houser as again being very 

 injurious in Ohio on Kelleys Island, South and Middle Bass Islands, 

 and also in vineyards along Lake Erie east and west of Cleveland. 



Prof. Slingerland (loc. cit.) reported that a correspondent informed 

 him that the crop was entirely ruined by this insect in some vineyards 

 at North East, Pa., in 1896. The same author makes the following 

 statement in regard to serious infestations in the State of New York: 



There are doubtless more or less "wormy" grapes each year in practically every 

 vineyard in New York State, so that the grape-berry moth is a constant menace. 

 But it seems seldom to have been injurious since 1873, when it was first reported as 

 increasing in numbers in the Hudson Valley. In 1898 it was a serious pest in the vine- 

 yard of a correspondent at Kendall, N. Y., and in 1902 reports reached us of its rav- 

 ages all through the Chautauqua grapebelt. From portions of some vineyards near 

 Brocton [N. Y.], a loss of from 25 to 50 per cent was reported, and in one case 90 per 

 cent of the fruit was ruined. 



During the investigations of grape insects at North East, Pa., by 

 the Bureau of Entomology, the grape-berry moth was found to be 

 very injurious over limited vineyard areas in this township in 1906, 

 1907, and 1908. In 1909 and 1910 the injury was not so great. In 

 1911, however, the infestation was noted to be quite heavy in two 

 or three vineyards. Serious injury was also noted in vineyards in 

 Ohio along the lake shore east and west of Cleveland, and also near 

 Sandusky. 



It is evident from these records that this is a serious enemy of the 

 grape, of long standing and wide distribution throughout the vine- 

 yard areas of the eastern United States. 



In the aggregate the crop loss due to its depredations must be very 

 great, but owing to the irregularity with which the infestation occurs 

 over vineyard areas it is exceedingly difficult to estimate the amount. 

 For this reason the insect has not been subject to the persistent and 

 painstaking efforts for its control on the part of the vineyardist that 

 so destructive an insect pest seems to warrant. 



HABITS OF THE ADULT OR MOTH. 



The adult grape-berry moth is rarely seen in the vineyard, even in 

 locations where it is quite abundant. It is a small slaty-brown moth 

 with peculiar shaded brown markings on the forewings which render 

 it quite inconspicuous upon the canes of the grapevine. When at rest 

 with the wings folded it is about one-fourth of an inch long (see PI. 

 IV, fig. 2) and measures less than one-half inch across the outspread 

 wings (see PI. IV, fig. 1). In captivity in the rearing cages the moths 

 were inactive during the day, remaining stationary upon the canes 

 of the vine beneath the denser foliage or upon the woodwork of the 



