. The Book of gardening; a handbook of horticulture. Gardening; Horticulture. 1056 THE BOOK OF GARDENING. in late spring and again in July. Lime and soot, in the pro- portion of three parts of the former to one of the latter, should be distributed over the patches in June. Hand-picking should also be resorted to, while all pupa? and perfect insects should be destroyed. Were it not for the good â¢offices of several Ichneumon Flies these pests would be even still more numerous. Ichneumoned larvse should never be inter- fered with ; they are readily told by the groups of yellowish-white cocoons s
. The Book of gardening; a handbook of horticulture. Gardening; Horticulture. 1056 THE BOOK OF GARDENING. in late spring and again in July. Lime and soot, in the pro- portion of three parts of the former to one of the latter, should be distributed over the patches in June. Hand-picking should also be resorted to, while all pupa? and perfect insects should be destroyed. Were it not for the good â¢offices of several Ichneumon Flies these pests would be even still more numerous. Ichneumoned larvse should never be inter- fered with ; they are readily told by the groups of yellowish-white cocoons surrounding the unfortunate Fig. 679.âPupa and Larva of PlERIS' BRASSICA. Another lepidopterous pest is the Cabbage Moth (Mamestra brassica) Cater- pillar, which eats into the hearts of Cabbages in summer, rendering them â disgusting. Hand-picking is the only remedy. The Cabbage Fly {Anthomyia brassica) and the Cabbage Aphis {Aphis brassica) are also troublesome. The grub of the former penetrates the stem if not prevented by liberal â dressings of soot and lime ; and the latter infests the under-surfaces of the foliage, from which they should be washed with a soft soap solution. Then there is the Snowy Fly {Aleyrodes proletelld), which also infests the under-surfaces of the leaves. These insects are very minute and have powdery wings. They should be treated to a soft soap solution, or in very bad cases the infested leaves should be removed and burnt. At the roots there are Wireworm {see Chapter "On Pests Generally") and the Cabbage and Turnip â¢Gall Weevil {Ceuthorrhynchus sulcicollis), whose yellowish footless grubs set up irritation in the roots, causing them to "gall" and eventually to rot. Gas-lime at the rate of one ton per acre should be applied to destroy the pests left in the soil after the crop has been lifted, and the ground then allowed to remain fallow for a time. Neither Cabbages nor Turnips should be grown the following season, and
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