. 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. Fig. 87. -Front of head and cauda of aphids: a, Microsiphum cralccgi; b, Myzus (apterous); c, Myzus (alate); d, Phorodon. scale white, 3-ridged, slender, edges parallel. Occurs on Boston fern, aspidistra, orange, orchids, Davallia (Figs. 85 and 86). Control.—On indoor plants for Mealy Bugs use Black Leaf 40 (i to 400) and soap (4 lb. to 50 gal.); for Hard and Soft Scales use whale-oil soap (i lb. to 2 gal.) or a diluti
. 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. Fig. 87. -Front of head and cauda of aphids: a, Microsiphum cralccgi; b, Myzus (apterous); c, Myzus (alate); d, Phorodon. scale white, 3-ridged, slender, edges parallel. Occurs on Boston fern, aspidistra, orange, orchids, Davallia (Figs. 85 and 86). Control.—On indoor plants for Mealy Bugs use Black Leaf 40 (i to 400) and soap (4 lb. to 50 gal.); for Hard and Soft Scales use whale-oil soap (i lb. to 2 gal.) or a dilution of some good miscible oil to which Black Leaf 40 has been 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, 1864-1927. Philadelphia : Blakiston
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
