 Immature alfalfa weevil larvae Alfalfa Weevil Adults are brownish and about 6 mm long with a medium-sized beak projecting down from the head. There is a triangular, darker brown stripe down the back. Newly hatched larvae are dingy yellow but soon become green with a shiny black head and prominent white stripe along the middle of the back. Adults feed on foliage. Larvae feed within leaf buds of the terminal growth and skeletonize leaves. Large populations can defoliate first-cutting alfalfa, hold back second-cutting regrowth, and lower hay quality. Host plants: alfalfa, clover, other legumes.
|
