. Injurious insects : how to recognize and control them . Insect pests; Insect pests. LEAF-}fIXERS IXJCRIXG THE FOLIAGE 189 black. It occurs principally in the South, and there are several generations annually. The pest may easily be checked by apply- ing arsenate of lead or Paris green, taking care not to use too heavy a dose, since beans are susceptible to burning. The Spinach Leaf-miner (Pcgoinija riciiia Lintn.) Wliitish mines arc mad.' ,n the leaves of beets and spinach by a maggot which burrows within the Several of these mines are seen often in a single leaf. The maggot is the
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. LEAF-}fIXERS IXJCRIXG THE FOLIAGE 189 black. It occurs principally in the South, and there are several generations annually. The pest may easily be checked by apply- ing arsenate of lead or Paris green, taking care not to use too heavy a dose, since beans are susceptible to burning. The Spinach Leaf-miner (Pcgoinija riciiia Lintn.) Wliitish mines arc mad.' ,n the leaves of beets and spinach by a maggot which burrows within the Several of these mines are seen often in a single leaf. The maggot is the larval stage of a gray, two-wiugcd fly, which lays its eggs on the under side of the leaf. The pupal stage is jiasscd in or on the groimd. There are several generations annually. Since this pest lives also in lamb's-quarters, thorough destruction of this weed will help in control. Where , infested leaves should be removed from the plants and destroyed. Xo successful sprays have been devised. The Tobacco Leaf-miner {Plitboii'iixra opercuhila Zell.) This pest is commonly known as the " ; It is a ^•ery small larva, and injures the older leaves of growing toliacco liy mining within the leaf tissues, causing small blotches. The larva? move more or less from place to place, one worm making se^"eral mines. There are several generations in a single season. The native food plant is horse nettle. Spraying or dusting with arsenate of lead or Paris green will kill manv larva- as thev start their new mines. Horse nettles should. Fio -30. —\\\)rk t^f tlio Spinach Leaf-miner. 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 O'Kane, Walter Collins, b. 1877. New York : The Macmillan Company
Size: 1860px × 1343px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
