. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Beneficial insects; Insect pests. 126 ORDER HEMIPTERA fields, upon which the lice maintain themselves until corn plants are available This species appears to become so completely 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 lanig
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. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Beneficial insects; Insect pests. 126 ORDER HEMIPTERA fields, upon which the lice maintain themselves until corn plants are available This species appears to become so completely 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- ated for a number of years in succession on the same ground. Woolly Apple Aphis {Schizoneura 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 work.. Osborn, Herbert, 1856-1954. Philadelphia ; New York : Lea & Febiger