. Economic entomology for the . On grapes there are often black-dotted slugs, the larvse of Blennocanipapygmcsa, that do some injury ; and on roses almost ever}" grower has been annoyed by numer- ous green slugs, the lar^^ae of Monostegia roscB, which make their appearance early in the season. Raspberries are sometimes severely in- jured by Httle spiny slugs, the larvse of Mojwphadnus rubi, that appear in June or early July, first eating round holes in the leaves, but e\'entually, when they become Grape-slug, larva of numerous cnouo-h, taking" the folia8:e com- 7iocampa pygm
. Economic entomology for the . On grapes there are often black-dotted slugs, the larvse of Blennocanipapygmcsa, that do some injury ; and on roses almost ever}" grower has been annoyed by numer- ous green slugs, the lar^^ae of Monostegia roscB, which make their appearance early in the season. Raspberries are sometimes severely in- jured by Httle spiny slugs, the larvse of Mojwphadnus rubi, that appear in June or early July, first eating round holes in the leaves, but e\'entually, when they become Grape-slug, larva of numerous cnouo-h, taking" the folia8:e com- 7iocampa pygmcza. ° pletel}-. Many other cultivated plants, in- cluding the strawberry, are attacked bv these saw-fly lan^se : but their habits are very similar, and the remedies to be adopted against them are also verv much the same. The largest of our American species, Cii/ibex americojia. is found on willow, sometimes in considerable number, as a pow- dery, whitish lan'a an inch and a half in length, with a broad dark stripe on its back. Experience has shown that all these species are very suscep- tible to the influence of white hellebore, and that e\'en a small quantity is quickly fatal. Infested plants can, therefore, be cleared in a few hours by a thorough drenching with a decoction of white hellebore, used at the rate of one ounce in one gallon of water ; or the plants may be dusted with the powder, undiluted or mixed with several times its owm bulk of cheap flour. Any stomach poison—, the arsenites or tobacco—will answer as w'ell as hellebore, while on the slimy types even fine road-dust will quickly choke them to death. Air-slaked or dr}- hydrate of lime burns through them in less than an hour when carefully ap- plied. These insects are so easily killed that it is the fault of the farmer himself if he suffers injur}^ The '''horn-tails" resemble the ''saw-flies" in away, but the character of the ovipositor is different and rather more like an auger or borer than l
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookpublishernp, bookyear1896
