60 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
Two applications were made; the first on June 17, before the bee- 
tles appeared, and the second on June 23. Infestation on the vine- 
yard proved to be rather ight, and only on the ends of the rows on 
the west side of the vineyards which adjoined lands given over to 
the production of grain crops were the beetles at all numerous. 
Hence there was not a very marked difference between the amount of 
injury on the sprayed and the check plats, with the exception of a 
few vines on the ends of the rows where the infestation was heaviest. 
Here the clusters on the untreated vines were quite ragged as a result 
of injury by the beetles, whereas upon the treated rows no injury 
was apparent. In previous years it had always been the custom of 
the owners of this vineyard to handpick the beetles. This season 
no handpicking was done. On a near-by vineyard on the same farm, 
however, where handpicking alone was depended upon, the injury 
by the beetles was much more in evidence, and the owners were very 
sorry that they did not resort to arsenical spraying instead of hand- 
picking, and have expressed their intention to rely upon spraying as 
a means of rose-chafer control in the future. 
The vineyard of Mr. C. F. Hirt, in which another experiment was 
undertaken, is located on sandy soil on the banks of Lake Erie. It is 
entirely isolated from other vineyards and is adjacent to pastures 
and general farm lands, and has the reputation of being one of the 
worst infested vineyards in this rose-chafer infested area. Several 
years ago the vineyard was practically abandoned on account of the 
injury done by the rose-chafer. During the past three or four years, 
however, efforts have been made to control the pest in this vineyard 
by handpicking; yet in spite of this, beetles wrought considerable 
injury to the crop. At the opening of the past season the owner 
was prevailed on to try out the poison-spray method as a means of 
control, with the understanding that no handpicking was to be done. 
Accordingly the vineyard, which consists of about 3 acres, was treated 
in the following manner: : 
| | 
Rows. | Bordeaux mixture. | eee Molasses. Water. 
| | Pounds. | 
10 | Lime, 3 pounds; copper sulphate, 3 pounds.....-.- 3y|ENone= 7-52 s---8- 6 | 50 gallons. 
6 | Lime, 3 pounds; copper sulphate, 3 pounds.....-. | Sol di gallone ce ss.2-254} 49 gallons. 
Ags W@W EC Ke es ae see eters aiceirein se eras ee yates eeenoe oes | Sepals fe eet eens aera 
8 | INON@ rsa 2 hoses cas ers pee eae ose nee eee Si MNONGt oases tee 50 gallons. 
| | 
Three spray applications were made, the first on June 8, before 
the blossom-buds had opened (see fig. 16) and before any beetles 
appeared. The object of this application was to thoroughly coat all 
of the blossom-buds and the new growth of foliage, which was com- 
paratively easy at this date, as the grapevines had not as yet made a 
very luxuriant growth. The second application was made June 17, 
when the first beetles appeared upon the vines, and a third on June 
