26 The HorticulturisV s Rule- Book. 



Cut-worm, CllmlJiilg, continued. 



Preventive. — Place strips of tin or bands of tar about the 

 trunk. Dig a small circular bole, with perpendicular sides, 

 about the base of the tree. 

 Remedies . — Arsenites . Hellebore, 



Dahlia. Four-stkiped Plant-Bug. — See under Currant. 

 Green Lettuce-Worm.— See under Lettuce. 



Deutzia. Four-Striped Plant-Bug. — See under Currant. 



Egg-Plant. Potato-Beetle. — See under Potato. 



Elm. Elm Flea-Beetle {Gallcnica xantho-melocna, Schr.). — A 

 small beetle, imported from Europe, which causes great 

 devastation in some of the eastern states by eating the 

 green matter from elm-leaves, causing the trees to appear as 

 if scorched. 

 Remedy. — Arsenites with kerosene emulsion. 

 Canker-Worm. — See under Apple. 

 Willow- Worm. — See under Willow, 



Endive. Green Lettuce- Worm.— See under Lettuce. 



Flea-Beetle (Phyllotreta vittata, Fabr. ; Haltica striolata, Harris) . 

 — A minute black-spotted beetle, feeding upon many plants, 

 as turnip, cabbage, radish, mustard, potato, strawberry 

 and stock§. It jumps upon being disturbed. Closely related 

 species attack various plants. Very destructive to plants 

 which are just appearing above the sui'face. 



Remedies.— There are no reliable preventives or remedies. 

 Arsenites, applied dry while the dew is on, are good. Land 

 plaster, lime, ashes, and tobacco-dust, applied in the same 

 manner, are more or less effective. Tobacco decoction used 

 very liberally. Wood-ashes applied liberally. Sometimes 

 ashes injure the plants. Kerosene emulsion throwTi with 

 great force against the plants. Calomel, mixed with jBlour 

 or ashes. The same remedies apply to other flea-beetles. 



Gipsy-Moth {Ocneria dispar, Linn.)— Larva, nearly two inches 

 long when mature, very hairy, nearly black, with a yellow 

 stripe along back and sides. Devour many kinds of foliage. 

 Confined to eastern Massachusetts, where it was introduced 

 from Europe about 1869. It is feared that it will become a 

 serious pest. 



Remedy, — Spray with arsenites as soon as the caterpillars 

 hatch in the spring. 



