59^ 



Bulletin 283. 



gals, of water. Ordinarily the poison should be combined with Bordeaux. 

 CURRANT LEAFSPOT, page 49 1. After fruit is half grown use hellebore. 



See 



GRAPE. 



The small, shining blue beetles 



Flea-beetle or appear in early spring and 



"Steely-beetle." eat 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 loo 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 15th to July ist, add i lb. Paris 

 green or 4 lbs. arsenate of lead to every 100 gals, 

 of Bordeaux mixture. See under black-rot. 

 (Page 492). Cornell Bulletin 157. 



The small white grubs (Fig. 

 Root-worm. 200) 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. Cornell Bulletins 208, 224, and 235. 



The small yellowish leaf-hoppers, erroneously called "thrip 

 Leaf -hopper, suck the sap from the undersides of the leaves, causing them to 



turn brown and dry up. Spray the underside of the leaves very 

 thoroughly with whale-oil soap, i lb. in 10 gals, of water, about July ist to kill 

 the young leaf-hoppers. Repeat the application in a week or ten days. Cornell 

 Bulletin 215. 



The ungainly, long-legged, grayish beetles occur in sandy regions 

 Rose-chafer, and often swarm into vineyards and destroy the blossoms and 



foliage. Spray thoroughly with arsenate of lead, 10 lbs. in 100 

 gals, of water. Repeat the application if necessary. 



Fig. 200. Grape root-worm. 



GREENHOUSE INSECTS. 



The nymphs are small, greenish, scale-like insects found on the 



White-fly. underside of the leaves; the adults are minute, white, mealy 



winged flies. Spray with kerosene emulsion or whale-oil soap; 



or if infesting cucumbers or tomatoes, fumigate over night with hydrocyanic acid 



gas, using i oz. of potassium cyanide to each 1,000 cubic feet of space. 



Spray with kerosene emulsion when practicable, or fumigate 

 Green aphis, with one of the tobacco preparations. If on violets, fumigate, 

 using i to f oz. potassium cyanide for every 1,000 cu. ft. of 

 space and leave the gas in i to i hour. 



