. Agricultural plant pest control : a study manual for commercial and governmental pesticide applicators . Weeds; Pests. wing covers. The larvae are legless, 8 mm long, and green with a dark brown to black head and a white stripe down the middle of the back. The first instar larvae are white. Damage: The larvae feed within the buds at the terminal and skeletonizing the leaves. Dam- aged leaves dry rapidly and the field appears gray or frosted. The larvae do the greatest damage to the first crop of hay. There is only one gen- eration per year. Adults also feed on the foliage. Adult alfalfa weev
. Agricultural plant pest control : a study manual for commercial and governmental pesticide applicators . Weeds; Pests. wing covers. The larvae are legless, 8 mm long, and green with a dark brown to black head and a white stripe down the middle of the back. The first instar larvae are white. Damage: The larvae feed within the buds at the terminal and skeletonizing the leaves. Dam- aged leaves dry rapidly and the field appears gray or frosted. The larvae do the greatest damage to the first crop of hay. There is only one gen- eration per year. Adults also feed on the foliage. Adult alfalfa weevil. Habitat: The alfalfa weevil is the major pest on alfalfa in the United States. It also feeds on clover and other legumes Alfalfa weevil larvae Control: Early cutting of alfalfa may reduce the damage caused by the larvae and ex- pose large num- bers to the sun and natural en- emies. The para- sitic wasp, Bathyplectes curcidionis, may reduce the population in some areas. Damage may jus- tify treatment with insecticides when the larval population reaches about 10 per straight sweep. Severe damage may also be expected if to overwintering adults per square foot are found early in the spring (April-May).. 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 Montana. Dept. of Agriculture; Hinck, Laura; Johnson, Kim; Mullin, Barbara H; Montana. Agricultural Sciences Division. Helena, Mont. : Montana Department of Agriculture
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Keywords: ., bookcentury1900, bookcollectionamericana, bookl, booksubjectweeds
