. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. IS better remedy, which has been employed with success, consists ic driving the beetles away from an infested field by a party of men or boys walking in a line across and wp ng branches from side to side. The beetles thus disturbed fly ahead, and by following them up may be cleared out entirely; once they are driven out of a field they seldom return. Spraying with Bordeaux mixture will keep them off the plants, and may be employed if necessary. The Beet Leaf-SIineu (Pegomyia vicina). Blotclics m
. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. IS better remedy, which has been employed with success, consists ic driving the beetles away from an infested field by a party of men or boys walking in a line across and wp ng branches from side to side. The beetles thus disturbed fly ahead, and by following them up may be cleared out entirely; once they are driven out of a field they seldom return. Spraying with Bordeaux mixture will keep them off the plants, and may be employed if necessary. The Beet Leaf-SIineu (Pegomyia vicina). Blotclics may often be seen on the leaves of beets and spinach, which are found on to bo caused by a minute maggot which feeds on the green tissue below the skin. TIic parent insect is a two-winged fly about a quarter of an inch in length, wiiich deposits its eggs on the foliage of these plants; the maggots when hatched immediately burrow beneath the surface and cannot therefore be reached by <»ny applications. The only method that seems at all available is to pick off and destroy the infested leaves, a laborious plan which can only be adopted where th" plants are grown on a small. Fig. 21.^Yellow Woolly-bear: (o) caterpillar (6) chrysalis; (c) moth. Fig. 22.âWhite Cabbage Butterflies. scale. If the attack is serious it would be worth while to adopt this method in order to get rid of the trouble and guard against its repetition. Caterpillahs. The foliage of beets and spinach ia liable to be attacked by some caterpillars, but as a rule they are in small numbers, widely scattered over the plants and seldom inflicting much damage. This does not apply to the extra- ordinary outbreaks on rare occasions of the Army-worm and the Variegated Cut- worm, which devour every green thing that they come to, beets as well as every- thing else. Among the others referred to may D. - itioned the Yellow Woolly- Bear (Diacrisia virginica) (Fig. 21), which is a nairy caterpillar,
Size: 2122px × 1177px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubj, booksubjectinsectpests
