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Manual of vegetable-garden insects . Fig. 11. — PupjE of the cabbagelooper (X 2f). INJURIOUS TO CABBAGE AND RELATED CROPS 11 by a disease. Diseased caterpillars at first turn yellowish andlater take on an ashy hue (Fig. 13). They become inactive,stop feeding and soon die. After death the skin breaks openand the body contentswhich have becomeliquid oozes out andbecomes smeared onthe leaves. Sometimesa large proportion ofthe caterpillars are de-stroyed by this diseaselate in the season. Control. The cabbage looperis a difficult insect to. Fig. 12. — Moth of the cabbage looper (X I3). poison beca
Manual of vegetable-garden insects . Fig. 11. — PupjE of the cabbagelooper (X 2f). INJURIOUS TO CABBAGE AND RELATED CROPS 11 by a disease. Diseased caterpillars at first turn yellowish andlater take on an ashy hue (Fig. 13). They become inactive,stop feeding and soon die. After death the skin breaks openand the body contentswhich have becomeliquid oozes out andbecomes smeared onthe leaves. Sometimesa large proportion ofthe caterpillars are de-stroyed by this diseaselate in the season. Control. The cabbage looperis a difficult insect to. Fig. 12. — Moth of the cabbage looper (X I3). poison because the caterpillars refuse to eat leaves coatedwith an insecticide and move quickly to some part of theplant that has been missed in spraying. Furthermore, it isnot easy to spray a cabbage plant so as to cover all parts of the leaves, especially theunderside of the outer leavesand those in the forminghead. Experiments on LongIsland have shown that goodresults may be obtained bythorough spraying with parisgreen, 1 pound in 80 gallonsof water to which the resin-lime mixture has been added. Some growers dust the plantslightly with pure paris green and have reported satisfactoryresults from this treatment.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1918