276 Report of the Entomologists of the 



a stand ou this late planted acre. First, we had planted only 

 about one-tenth as many marginal squashes at the first planting 

 as was necessary to supply the large number of beetles with food ; 

 and, second, at time of first spraying with Bordeaux mixture 

 the late planted cucumbers were just coming up. The result was 

 they could not be thoroughly sprayed, and, as soon as the beetles 

 had devoured the marginal squashes, they went after the cucum- 

 bers, even before they were up. It was interesting to note the 

 instinct shown by the beetles in finding the cross rows of squashes 

 as soon as they came up. 



Picking on this field was commenced July 30 and continued 

 until September 10. In all 143,455 marketable pickles were ob- 

 tained from the two acres. These sold for $183.68. The yield 

 per acre was 71,727 pickles and the value per acre $91.84. 



At Smithtown Branch but few beetles appeared on the field. 

 These came late in June and fed entirely upon the marginal 

 squashes. The result was a perfect stand of cucumbers. The 

 vines were injured slightly by the first spraying, the l-to-8 formula 

 being used. 



Picking on this acre was commenced July 19 and continued 

 until September 3. A yield of 90,536 marketable pickles, valued 

 at $113.16, was obtained. In addition, 400 ripe cucimibers were 

 sold; about 1,000 ripe cucumbers and 7,000 nubs, actual count, 

 were left on the field; making a total yield of 98,936. 



Conclusion. — The results of these tests show three things : 

 First, that if the l-to-8 formula for Bordeaux mixture is used 

 young cucumber and muskmelon vines will be injured ; that it 

 will make the plants unpalatable and drive the beetles as well as 

 any other substance recommended for the latter purpose ; and that 

 it is much cheaper than covers. Second, that if green arsenite 

 is used dry on squash vines before the beetles commence to mate, 

 many of the beetles will be killed; also that neither the green 

 arsenite nor the lead arsenite are very valuable if used in water. 

 Third, that a combination of measures must be used, and, that 



