. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. Pig. 217.—Strawberry root weevil {Otiorhynchus ovatus) and its grub. {After Treherne, Bui. 8, Div. Ent., Dept. Agric, Can.) Larva.—A small white grub ^^ inch long; feeds on roots of straw- berry, clover, timothy, rhubarb, rumex; lasts about 7 months. Winters partly grown. Pupa.—Four to eight inches below surface; lasts from 21 to 24 days. May-June. Control.—Rotation of crops as two-and three-year plantations suffer mos
. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. Pig. 217.—Strawberry root weevil {Otiorhynchus ovatus) and its grub. {After Treherne, Bui. 8, Div. Ent., Dept. Agric, Can.) Larva.—A small white grub ^^ inch long; feeds on roots of straw- berry, clover, timothy, rhubarb, rumex; lasts about 7 months. Winters partly grown. Pupa.—Four to eight inches below surface; lasts from 21 to 24 days. May-June. Control.—Rotation of crops as two-and three-year plantations suffer most; thorough cultivation; growing of suitable varieties; use of chickens. The Black Vine Weevil or the Cyclamen Borer {Otiorhynchus sulcatus Fab.).—Occurs from the Atlantic to the Pacific in Northern U. S. and Canada, and is injurious to roots and crown of strawberry, also to Gloxinia, Cyclamen, Primula, Maiden-hair fern n greenhouses. Adult.—A black beetle, % inch long, with patches of yellowish hairs on the wing-covers. Wing-covers joined together and wings Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lochhead, William, 1864-. Philadelphia, Blakiston
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
