. Agricultural plant pest control : a study manual for commercial and governmental pesticide applicators . Weeds; Pests. lowish-white color, about 1/4 inch long, sharply pointed at the head end, legless, and very tough- skinned. They pupate inside the brown puparium in the soil and emerge as adults in 12 to 15 days. The insect can complete a life cycle in 3 weeks making 3 generations per year a possibility in Montana. Seed corn maggot larvae Damage: Seed at- tacked by the seed com maggot usually fails to sprout, or if it does sprout, the plant is weak and sickly. The mag- gots will be found bu
. Agricultural plant pest control : a study manual for commercial and governmental pesticide applicators . Weeds; Pests. lowish-white color, about 1/4 inch long, sharply pointed at the head end, legless, and very tough- skinned. They pupate inside the brown puparium in the soil and emerge as adults in 12 to 15 days. The insect can complete a life cycle in 3 weeks making 3 generations per year a possibility in Montana. Seed corn maggot larvae Damage: Seed at- tacked by the seed com maggot usually fails to sprout, or if it does sprout, the plant is weak and sickly. The mag- gots will be found burrowing in the seed and in- jury is usually most severe in wet, cold seasons and on land rich in organic matter. Habitat: Seed com maggots are found in fields where corn is planted and volunteer com grows. These insects can also be found where the fields contain a high amount of organic material. Control: Shallow planting of corn in a well- prepared seedbed, sufficiently late to get a quick germination of the seed, is probably the best means of preventing injury. Land that is heavily manured, or where a cover crop is turned under, should be plowed early in the fall if possible, so it will be less attractive to the egg-laying females the following spring. Prompt resetting or re- planting of the damaged crops will usually give a stand. This insect is particularly susceptible to control by insecticidal seed treatments. Western com rootiwm - Dkhotica Life cycle: There are 3 species of corn root- worms in the USA. Only the western com root- worm is know to infest corn in Montana. The adult beetles are about 1/4 inch long, yellow or greenish-yellow in color with 3 dark stripes on its back. Com rootworm larvae are thread-like, wrinkled, white worms about 1/2 inch long with yellowish-brown heads. Corn rootworm adults emerge in late summer and are present until the first frost. The female beetles deposit eggs about 2 weeks after emerg- ing. The eggs are laid in the soil around the base
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Keywords: ., bookcentury1900, bookcollectionamericana, bookl, booksubjectweeds
