Insect pests of farm, garden and orchard . the supply of aphides for infesting the seed stalks in earlyspring. This being the case it should be an easy matter todestroy the aphides by fumigation before removing them fromthe pits. Control.—From the habits outlined it is evident that, as for other cabbage pests, the refuse of the crop should be cleared up and destroyed in the fall. Any of the standard contact insecticides, such as kerosene emulsion, 1 part stock solution to 15 parts of * F. A. Sirrine, Bulletin S3, N. Y. Agr. Exp. Sta., p. 675. 374 INSECT PESTS OF FARM, GARDEN AND ORCHARD water,
Insect pests of farm, garden and orchard . the supply of aphides for infesting the seed stalks in earlyspring. This being the case it should be an easy matter todestroy the aphides by fumigation before removing them fromthe pits. Control.—From the habits outlined it is evident that, as for other cabbage pests, the refuse of the crop should be cleared up and destroyed in the fall. Any of the standard contact insecticides, such as kerosene emulsion, 1 part stock solution to 15 parts of * F. A. Sirrine, Bulletin S3, N. Y. Agr. Exp. Sta., p. 675. 374 INSECT PESTS OF FARM, GARDEN AND ORCHARD water, whale oil-suap, J pound to G gallons, or black leaf-tobaccoextract, 1 part to 6-i of water, will destroy the aphides, but thespraying must be thorough, as the waxy coating serves to pro-tect them. According to Professor Franklin Sherman, any goodlaundry soap used at the rate of 1 pound dissolved in 3 gallons ofwater, will destroy the aphides. Where water under pressure isavailable in a small garden, the aphides may be held in check ])y. Fig. 270.—The spinach-aphifci {Myzus persiav 8ulz.): which often becomesa cabbage pest: a, winged adult; b, young nynii)h; c, older nymph; d,last stage of nymph—all greatly enlarged. (After Chittenden, U. Agr.) washing them from the plants with a strong stream from a gardenhose. Plants infested in tiie seed-bed may be freed from theaphis by dipping in whale-oil soap solution, 1 part to S of water. Fortunately for the grower, the cabbage-aphis is usually heldin check by numerous parasitic enemies, principally little wasp-like flies of the family Braconidae, and by several species of lady-bird-beetles and syrphus-fly larvae, which will often destroy acolonv within a few davs. INJURIOUS TO CABBAGE AND CRUCIFEROUS CROPS 375 The Spinach-aphis or Green Peach-aphis * Another species of aphis often becomes destructive to cabbage,spinach, celery and lettuce, as well as various greenhouse the fall it migrates to peach, and is also
Size: 1814px × 1377px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1912
