Insect pests of farm, garden and orchard . FlG. 151.—The pea-aphis: 1, winged female; 2, wingless vivip-arous female—greatly enlarged. (After Folsom.) wise they continue to multiply on the clover. In late fall theyreturn to the clover upon which the eggs are laid, in which stagethe winter is passed, though in open winters many of the viviparousfemales live over winter on the clover. Control.—This is another pest which is usually held undercontrol by a fungous disease, and as the fungus does not developin dry seasons, with dry weather the aphis increases unchecked,while with a norma
Insect pests of farm, garden and orchard . FlG. 151.—The pea-aphis: 1, winged female; 2, wingless vivip-arous female—greatly enlarged. (After Folsom.) wise they continue to multiply on the clover. In late fall theyreturn to the clover upon which the eggs are laid, in which stagethe winter is passed, though in open winters many of the viviparousfemales live over winter on the clover. Control.—This is another pest which is usually held undercontrol by a fungous disease, and as the fungus does not developin dry seasons, with dry weather the aphis increases unchecked,while with a normal rainfall it is usually held in subjection,Unfortunately we are unal^le to predict the weather probabilities,and when the aphides are found present on clover in considerable* Macrosiphum pisi Kalt. Family AphididcB. 212 INSECT PESTS OF FARM, GARDEN AND ORCHARD numbers, the only thing to do is to cut and cure it as soon as pos-sible, before serious damage has been done. The drying of theclover will kill most of the aphides or cause
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