342 



Th^se small, slimy, slug-like, dark green larvae (Fig. 154) skele- 

 Pear slug. tonize the leaves in Jime, and a second brood appears in 



August. Spray thoroughly 

 with I lb. Paris green, or 4 lbs. arsenate of lead, 

 in 100 gals, of water. 



Plant-lice. 



Fig. 155. Grape root-worm. 



NURSERY STOCK. 



Spray thoroughly or dip the 

 tips in kerosene emulsion, diluted 

 witl^ 6 parts of water, or whale-oil soap, i lb. 

 in 5 gals, of water. 



After the trees are dug, fumi- 

 San Jose scale, gate with hydrocyanic acid 

 gas, using I ounce of potassium 

 cyanide for every 100 cubic feet of space. Con- 

 tinue the fumigation from , one-half to three 

 quarters of an hour. Do not fumigate the trees 

 when they are wet, since the presence of moist- 

 ure renders them liable to injury. 



GRAPE. 



The small, shining blue beetles - 

 Flea-beetle or appear in early spring and eat 

 "Steely-beetle." into the opening buds. The 



brown larvae feed on the leaves in May and June. When buds 

 begin to swell cover them thoroughly with arsenate of lead, 8, lbs. in 100 gals, of 

 water, or when beetles appear, hand-pick them into a pan containing a little 

 kerosene. To kill the larvae on the leaves from May isth, to July ist, add i lb. 

 Paris green or 4 lbs. ajseilate of 

 lead to every 100 gals, of Bor- 

 deaux mixture. See under 

 BLACK-ROT. Comell Bulletin 157. 



T-he small 

 Root-worm, white grubs. 



(Fig. 1 5 5) feed 

 upon the roots, often killing the 

 vines in a few years. The adults 

 are small grayish-brown beetles 

 that eat peculiar chain-like holes 

 in the leaves during July and 

 August. Cultivate thoroughly in 

 June especially close around the 

 vines to kill the pupae in the soil. 

 Spray thoroughly the latter part 

 of June with arsenate of lead, 6 

 lbs. in 100 gals, of water, to kill 

 the beetles. Repeat the applica- 

 tion in a week or ten days. Cor- 

 nell Bulletins 208 and 224, 235. pjg. ijg, Cmrant-worms, 



