Grape Insects and Diseases 355 



Spray with arsenate of lead while the beetles are feeding 

 on the leaves. The beetles may be jarred down on sheets, as 

 with the plum-curculio. Bag the clusters. 



GRAPE ROOT- WORM (Fidia viticida). The small white grubs 

 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. At the first appearance of 

 the beetles, spray the plants with arsenate of lead at the rate 

 of eight or ten pounds in one hundred gallons 'of water, to 

 which should be added one gallon of molasses. 



GRAPE-SLUG or SAW-FLY (Selandria vitis). Larva, about l /$ 

 inch long, yellowish green with black points, feeding upon the 

 leaves; two broods. 

 Arsenicals; hellebore. 



GRAPEBERRY-WORM (Polychrosis viteana). Larva, about K 

 inch long, feeding on the berry, often securing three or four 

 together by a web; two broods. 



Spray with arsenate of lead before blossoms open. Repeat 

 after blooming and again in early July. Destroy wormy 

 berries in August. 



GRAPE-VINE FLEA-BEETLE (Graptodera chalybea). Beetle, of a 

 blue metallic color, about 34 inch long, feeding upon the buds 

 and tender shoots in early spring. 



Arsenicals to kill the grubs on leaves during May and June. 

 The beetle can be caught by jarring on bright days. 



GRAPE-VINE SPHINX (Ampelophaga myron). A large larva, 2 

 inches long when mature, green with yellow spots and stripes, 

 bearing a horn at the posterior extremity, feeding upon the 

 leaves and nipping off the young clusters of grapes; two 

 broods. 



Hand-picking. Arsenicals early in the season. 



LEAF-HOPPER (Typhlocyba comes). These small yellowish leaf- 

 hoppers, erroneously called "thrips," suck the sap from the 

 under side of the leaves, causing them to turn brown and 

 dry up. 



Spray the under side of the leaves very thoroughly with 

 one gallon "black leaf 40" in 1,000 gallons of water about 

 July 1, to kill the young leaf-hoppers. When using tobacco 



