— 28 



leaves and other rubbish, it is important that all such refuse be gathered up and 

 burned in autumn so as to reduce as much as possible the opportunities for these 

 insects to hibernate near the vines. Grape growers should watch for the appear- 

 ance of the insects when the buds are forming, and when they are detected, a 

 strong spray of either Paris Green or arsenate of lead should be applied to the 

 vines so that every bud will be literally soaked. The buds will stand as strong a 

 dose of Paris Green as one pound in 75 gallons of water, with an equal amount 

 of freshly slaked lime added. In a few days the application should be renewed, 



'^ i 



The Grape-vine Flea-beetle ; a, adult enlarged 7 times, hind leg enlarged at right ; b, grub 

 enlarged 6 times ; c, grubs and beetles on foliage —natural size ; d, beetle feeding on bud : 

 e, diseased beetles. (After Marlatt, U.S. Dept. Agr. 



or sooner if the first treatment is washed off by rain. Arsenate of lead is recom- 

 mended as strong as eight pounds to a barrel of water. In small gardens the prac- 

 tice of jarring the beetles from the vines into an inverted umbrella, and then drop- 

 ping them into a pan containing coal *oii and water, is of value. When the grubs 

 are found feeding upon the leaves, spraying with Paris Green or arsenate of lead 

 in the ordinary strengths (one pound of Paris Green to i6o gallons of water, or 

 arsenate of lead 2 pounds in 40 gallons of water) will give relief. The destruc- 

 tion of the grubs is an important factor in the control of the insect, because every 

 grub killed means one beetle less the following spring to attack the buds. 



THE BLACK ^lARGIXED FLEA-BEETLE {Systcna marginalis 111.) 



Occasionally in eastern Canada outbreaks of this insect have appeared in the 

 middle of the summer, considerable injury to certain forest and shade trees result- 

 ing therefrom. At Ottawa, the worst attack has been in August, when the beetles 

 appeared in large numbers feeding chiefly on elm, oak and hickory. This flea- 

 beetle is from one-eighth to about three-sixteenths of an inch long, yellowish- 



