. A text-book of agricultural zoology. Zoology, Agricultural; Zoology, Economic. 218 DIPTEPvA OR TRUE FLIES. 109, 4), a yellowish grub with two black points at tlie end of the tail. One often finds these grubs abundant in rank manure. Prevention and Treatment.—Little can be done when the grubs are once installed in a plant. Where cabbages are grown year after year on the same land, the soil is sure to become contam-. Fig. 100,—Root-eating Flies. 1, Larva of lyrassicm; 2 and 3, pupariuni of A. hra^ica; 4 and 5, A. radi- cum; (3 and 7, larv^ of llomalomyia; 8 and 9, HoniaJomyia sp. (?
. A text-book of agricultural zoology. Zoology, Agricultural; Zoology, Economic. 218 DIPTEPvA OR TRUE FLIES. 109, 4), a yellowish grub with two black points at tlie end of the tail. One often finds these grubs abundant in rank manure. Prevention and Treatment.—Little can be done when the grubs are once installed in a plant. Where cabbages are grown year after year on the same land, the soil is sure to become contam-. Fig. 100,—Root-eating Flies. 1, Larva of lyrassicm; 2 and 3, pupariuni of A. hra^ica; 4 and 5, A. radi- cum; (3 and 7, larv^ of llomalomyia; 8 and 9, HoniaJomyia sp. (?) (Curtis.) inated unless cleaned annually; for this gas lime is recom- mended. Dibbling in the plants with a little soot and lime is a good deterrent; and broadcasting the same over j'oung plants not only keeps off these flies but slugs as well. All the diseased cabbage stalks and roots ought to be biu'nt, instead of being put up in heaps to rot, when many of the grubs will escape. Wheat-bulb Fly (Hylemyia coarctata). The Wheat-bulb Fly is chiefly harmful in the Fen districts to wheat. It is said to be most destructive on land fallowed in tlie previous summer, and where the crop has been so thin as to expose the land (Ormerod). The Wheat-bulb Fly lays her eggs in the young wheat, the larva living in the centre of the plant. The grub is white in colour, and can be told by the curious pro- cesses at the tail end. These larvne are found in April destroy-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Theobald, Frederick Vincent, 1868-1930. Edinburgh and London, W. Blackwood and Sons
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1899
