. Circular. Agriculture; Agriculture; Entomology. Vegetable Plant Lice Reproduction on the pea is rapid, and soon enough lice are pres- ent to sap the vitality of the plant, and the farmer finds that his peas are lousy and certain to give a greatly reduced crop if any at all. By midsummer the pea crop is off and such of the lice as could not develop wings and escape, perish. The contant production of winged forms and their more or less constant movement lead to in- festation of late peas when they are grown. Throughout the season, breeding continues on clovers, and sometimes serious damage is
. Circular. Agriculture; Agriculture; Entomology. Vegetable Plant Lice Reproduction on the pea is rapid, and soon enough lice are pres- ent to sap the vitality of the plant, and the farmer finds that his peas are lousy and certain to give a greatly reduced crop if any at all. By midsummer the pea crop is off and such of the lice as could not develop wings and escape, perish. The contant production of winged forms and their more or less constant movement lead to in- festation of late peas when they are grown. Throughout the season, breeding continues on clovers, and sometimes serious damage is done to that crop. Late in the fall the winged forms, which may have been devel- oped on vegetable crops, make their way back to clover and vetch, true males and females are produced and the over-wintering eggs Fig-. 4 Cabbage Aphis i—Adult winged female; 2—Immature female; 3—Adult wing- less female Bean Louse (Aphis rumicis Linn.) The species was taken on bean abundantly in the summer of 1916, but has not since been noted. Cabbage Aphis (Aphis brassicae Linn.) The cabbage louse is a small green insect. Its body is apparent- ly covered with a mealy 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 New Jersey Agricultural Experiment Station; New Jersey Agricultural College. Experiment Station. New Brunswick, New Jersey Agricultural Experiment Station
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Keywords: ., bookcentury1900, booksubjectagriculture, booksubjectentomology
