Egyptian Alfalfa Weevil Item type text; Pamphlet


Adult Egyptian alfalfa weevils (Hypera brunneipennis) are light brown with dark brown and grey markings down their backs and are about 0.2 inches long. Adult weevils emerge from a summer resting state called aestivation in late fall or winter and begin to migrate to alfalfa fields to feed, mate and lay eggs. The female chews a hole in the stem then inserts her eggs into the center of the stem. Smooth, shiny, yellow eggs are laid in living or dead stems three to six inches above the soil surface or in plant debris on the ground. Eggs hatch in five to ten days. The legless larvae are initially tiny, yellowish green in color and reach a length of 0.25 inch when fully grown. Mature larvae are pale or light green with a thin white stripe down the center of their back and have a dark brown to black head. Larval development takes about three weeks and normally is completed at about the time of the first hay cutting

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