Guide to the study of insects, and a treatise on those injurious and beneficial to crops: for the use of colleges, farm-schools, and agriculturists . TKNTHKKDIMDJE. 22.} mountain-ash. It appears in June and September. The fly isshiny black, with the tips of the four anterior femora, and thetibi;v and tarsi, dull white. An egg-parasite, belonging to thegenus Encyrtus, renders, according to Peck, a great numberof its eggs abortive. The Rose-slug, Selawlrid, « Harris, is longer than the Pear-slug, the body being scarcely thickened anteriorly, and notcovered with slime. It is pale-green and
Guide to the study of insects, and a treatise on those injurious and beneficial to crops: for the use of colleges, farm-schools, and agriculturists . TKNTHKKDIMDJE. 22.} mountain-ash. It appears in June and September. The fly isshiny black, with the tips of the four anterior femora, and thetibi;v and tarsi, dull white. An egg-parasite, belonging to thegenus Encyrtus, renders, according to Peck, a great numberof its eggs abortive. The Rose-slug, Selawlrid, « Harris, is longer than the Pear-slug, the body being scarcely thickened anteriorly, and notcovered with slime. It is pale-green and yellowish appears in July and August, and does great injuiy in dis-ligtiring and killing the leaves of therose, which remain dried and with-ered on the bush. AVhen full-fed,the larva, like the Pear-slug, makesa cocoon beneath the surface of theground. The flies are seen in abund-ance about the rose-bushes as soon ris-as the leaves are expanded, when they may be caught withnets, or the hand on cloudy days. Hand-picking, and theapplication of a very weak solution of carbolic acid, coal oil,whale oil soap, or quassia, are useful in ki
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishe, booksubjectinsects
