. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. 678 E3NCYCLOPE3DIA OF PRACTICAL HORTICULTURE ]!fatTiral Enemies The ladybird beetles, H%ppodamia con- vergens, MegiUa maculata and Goccinella caUfornica, prey to some extent upon this pest. The real check, however, is the in- ternal parasite, Diaeretus californicus Baker. E. 0. EiSsiG CaTbha^e and Radish Maggot PhorHa l)ras$icae Bauche A. L. LOVE
. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. 678 E3NCYCLOPE3DIA OF PRACTICAL HORTICULTURE ]!fatTiral Enemies The ladybird beetles, H%ppodamia con- vergens, MegiUa maculata and Goccinella caUfornica, prey to some extent upon this pest. The real check, however, is the in- ternal parasite, Diaeretus californicus Baker. E. 0. EiSsiG CaTbha^e and Radish Maggot PhorHa l)ras$icae Bauche A. L. LOVETT This insect is considered a very serious pest throughout the Pacific Northwest, or wherever cabbages and radishes are grown. In the truck crop regions, where these crops are grown over considerable areas and for a period of years on the same soil, the pest is especially serious. Flants Attacked Besides attacking the cabbage and rad- ish, this maggot feeds on the turnip, caul- iflower, celery, rape, kale, and a variety of the closely allied Cruciferiae. It is also found about the roots of some of the wild plants of this group, including mus- tard and radish. Description The Larva.—It is as a larva that the cabbage maggot is injurious and hence best known to the grower. At this stage It is a footless grub or maggot (see Fig. 1), waxy white or yellowish in color. The. Or* MfSf^^ Fig. 1. The Cabbage Maggot {PJiorlia Iras- svcae), a, adult fly; b, got; c, puparium; d, tbe egg (much enlarged). (Original) body is cylindrical, ending bluntly be- hind and tapering to a point at the ce^ phalic end. When mature, it measures about .32 of an inch in length. The Pwpa.—The pupal or resting stage of the cabbage maggot is passed in the soil about the roots of the infested plant. Exceptions to this rule occur in the forms which assume the aerial habit and in the few which pupate in their burrows in the root. The pupa consists of a small brown case or puparium some two-tenths of an inch in
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Keywords: ., bookcentury1900, booksubjectfruitculture, booksubjectgardening
