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Turfgrass and Insects
Sod webworms
The appearance of irregular brown spots in the lawn is the first indication of sod webworms. Grass blades will be chewed off at or just above the soil surface. Fresh clippings and green fecal pellets are also present. Larvae live in silk-lined tubes in the thatch layer, so look for pencil-size holes in the thatch. Larvae do all their feeding at night, and therefore treatments should be made in the early morning or late afternoon. webworms
IPM1020, new June 2003
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