. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Insects, Injurious and beneficial. 120 ORDER HEMIPTERA fields, upon which the hce maintain themselves until corn plants are available This species aj)pears to become so comj)letely adapted for underground life and the association with ants that it does not necessitate producing any winged generation for distribution or for alternation with another food plant. On account, of this relation to ants, one of the measures of control is to plow and harrow the ground thoroughly. Fig. 83.—Woolly aphis {Schizoneura la
. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Insects, Injurious and beneficial. 120 ORDER HEMIPTERA fields, upon which the hce maintain themselves until corn plants are available This species aj)pears to become so comj)letely adapted for underground life and the association with ants that it does not necessitate producing any winged generation for distribution or for alternation with another food plant. On account, of this relation to ants, one of the measures of control is to plow and harrow the ground thoroughly. Fig. 83.—Woolly aphis {Schizoneura lanigera): a, agamic female; b, larval louse; c, pupa; d, winged female with enlarged antenna above; all greatly enlarged and with waxy excretion removed. (From Marlatt, Div. Ent., U. S. Dept. Ag.) in order to break up the nests of the ants. This method adopted in the autumn together with a wider cultivation and destruction of weeds in the fields in spring will assist in keeping the pest in check. Perhaps the most important measure is a rotation of crops so that corn will not be culti- vated for a number of years in succession on the same ground. Woolly Apple Aphis {Sckizorievra lanigera).—The woolly apple aphis is a very destructive species, its injury for the. 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 Osborn, Herbert, 1856-1954. Philadelphia, New York, Lea & Febiger
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1916
