130 FIRST ANNUAL REPORT OF 



"On the 20th of August last we observed that many of the berries 

 in the bunches of a Clinton vine under our care were shriveling up. 

 On opening the grapes, we observed that most of the smaller berries 

 — that is those which had shriveled earliest — contained only one seed, 

 and that of an unusually large size. Some of the larger shriveled 

 grapes contained two seeds, much swollen, each having a dark spot 

 somewhere on their surface. On cutting the seeds carefully open, the 

 kernel was found almost entirely consumed, and the cavity occupied 

 by a small milk-white footless grub with a pair of brown hooked man- 

 dibles, a smooth and glossy skin with a few very fine short white 

 hairs. When at rest it is nearly oval in form, but when in motion its 

 body is elongated, varying in length from one-fifteenth to one-twelfth 

 of an inch. * * * 



" The Clinton vine on which this pest was first discovered suffered 

 considerably, fully ten per cent, of the crop was lost from the shrivel- 

 ing of affected berries. At first we supposed that the work of the 

 insect was confined to berries of this appearance, and that by destroy- 

 ing these the destruction of the crop of insects for the season would 

 be complete, but further examination showed that many of the ripe 

 berries contained affected seeds. The proportion thus affected on 

 the vine referred to was about ten or eleven per cent. Within a few 

 ieet of this vine an Isabella was fruiting ; on this there were no shriv- 

 eled berries, but about three per cent, of those which had ripened 

 were injured. About the same distance in another direction was a 

 Hartford Prolific, and about ten feet further off a Concord, both of 

 which fruited well. On neither af these were there any shriveled 

 berries, nor could we find any affected seeds among those which had 

 ripened. The fruit of a Delaware, about fifty feet distant from the 

 Clinton, was also examined without discovering any traces of the in- 

 sect, 



"About the middle of September we visited the grounds of Mr. 

 Charles Arnold, of Paris, and there we found that this insect had pre- 

 vailed to a greater extent than it had with ourselves, affecting the 

 Clinton, Delaware, one of Rogers' Hybrids, and also Mr. Arnold's new 

 seedlings. In Hamilton, in the garden of Mr. W. H. Mills, we found 

 an affected seed in a berry of Rogers' No. 4. On the 24th of Septem- 

 ber we visited the vineyard of the Vine Growers' Association at 

 Cooksville, but could not find any traces of the insect there. Thus 

 far its depredations are most apparent about London and Paris, but 

 probably further examination will show that it is widely distributed. 



"Where any shriveled berries are found their seeds should be 

 carefully opened and examined, asitis important to know how far the 

 insect prevails. The affected berries are usually swollen, somewhat 

 soft, and have a dark spot somewhere on their surface; any of this 

 character observed among the ripe berries should also be examined. 



"In the case of the shriveled berries, where one seed only is af- 



