. Cooperative economic insect report. Beneficial insects; Insect pests. Labops sp. Adults and Damage to Wheatgrass Economic Importance: Grass bugs have caused important damage to crested wheatgrass and other grasses in western areas of the United States in certain years. This is the fifth consecutive year that severe damage (up to 50 percent) to crested and intermediate wheatgrass has been observed in Utah. In that State, approximately 58,000 acres of planted grass areas have been severely injured in Garfield and Kane Counties this year, while large areas of planted grasses have been moderatel
. Cooperative economic insect report. Beneficial insects; Insect pests. Labops sp. Adults and Damage to Wheatgrass Economic Importance: Grass bugs have caused important damage to crested wheatgrass and other grasses in western areas of the United States in certain years. This is the fifth consecutive year that severe damage (up to 50 percent) to crested and intermediate wheatgrass has been observed in Utah. In that State, approximately 58,000 acres of planted grass areas have been severely injured in Garfield and Kane Counties this year, while large areas of planted grasses have been moderately injured in Iron County. The insects stunt the growth of wheatgrasses and cause the leaves to turn yellow or white. In addition, a drop in the yield of seed and hay may occur. Serious damage to wheat took place at. the edges of the fields when the insects moved from adjacent crested wheatgrass fields in Montana in 1938, 1951 and 1952. In New Mexico, extensive injury to crested wheatgrass in reseeding areas occurred in 1963 in the Santa Fe National Forest. While L. hesperius is apparently the principal species found in these outbreaks, Labop¥ spp., Irbisia spp. and possibly other plant bugs may be involved. Distribution: L. hesperius has been recorded in Arizona, Colorado, Idaho, Montana, Nebraska, New Mexico, Oregon, South Dakota, Utah, Washington and Wyoming. Canadian records for the species included: Alberta, British Columbia and Yukon Territory. According to Slater (1954), eastern records of this species probably should be referred to as L^ hirtus Knight. Hosts: Crested and intermediate wheatgrasses and other grasses. Wheat, barley and rye also may be attacked. Life History and Habits: Owing to the lack of biological studies on Labops, no definite information is available. Adults have been collected from early May through late July. They are generally most abundant in Wyoming in May and June. Eggs apparently are deposited from late May on to July. As far as known, over- wi
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