. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. ROOT CROPS. 63 stages, when the insects commit so much damage, but they ward off the " flies," being objectionable to them. Cure.—(1) " Roll and lightly harrow after 8 and before 6 , for this disturbs and weakens the ' fly,' and stimulates the yotmg plant. Sow eight bushels per acre. Fig. 27.—Turnip Aphis {ApMsftoris-rapa). •A. Male with closed wings (enlarged). B. Its natural size. 0. Wingless female (enlarged). D, Its natural size. B. Flask-shaped abdo
. The diseases of crops and their remedies : a handbook of economic biology for farmers and students. Plant diseases. ROOT CROPS. 63 stages, when the insects commit so much damage, but they ward off the " flies," being objectionable to them. Cure.—(1) " Roll and lightly harrow after 8 and before 6 , for this disturbs and weakens the ' fly,' and stimulates the yotmg plant. Sow eight bushels per acre. Fig. 27.—Turnip Aphis {ApMsftoris-rapa). •A. Male with closed wings (enlarged). B. Its natural size. 0. Wingless female (enlarged). D, Its natural size. B. Flask-shaped abdomen of Aphis rapce. of fresh-slaked lime along the rows just as the plants are ; (2) " Dustings of fine ashes or soot are also effectual, but salt must not be used, for it injures the plant and does not hurt the ; Dressings should always be applied whilst the dew is on the plants. (3) Mr. W. Gr. Mount, , has eradicated the turnip fly with either lime or paraffin distributed by means of a Strawso- nizer (see Miss Ormerod's Common Farm Pests). The Turnip Aphis or Green Fly (Aphis floris- rapce and Aphis rapce, Kg. 27) is allied to the bean aphis. 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 Griffiths, A. B. (Arthur Bower), 1859-. London : G. Bell
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Keywords: ., bookauthorgriffith, bookcentury1800, bookdecade1890, bookyear1890
