ALFALFA WEEVIL CONTROL, 1999

Ovicidal activity of san-155 against eggs of the alfalfa weevil

Alfalfa weevil pest status and incidence of selected natural enemies in Virginia

Evaluation of toxicity of biorational insecticides against larvae of the alfalfa weevil

The alfalfa weevil, Hypera postica (Coleoptera: Curculionidae), is a major pest of alfalfa Medicago sativa L. (Fabaceae). While H. postica usually causes the most damage before the first cutting, in summer of 2015 damaging levels of the pest persisted in Montana well after the first harvest of alfalfa. Although conventional insecticides can control H. postica, these chemicals have adverse effec...

A degree-day model of sheep grazing influence on alfalfa weevil and crop characteristics.

Domestic sheep (Ovis spp.) grazing is emerging as an integrated pest management tactic for alfalfa weevil, Hypera postica (Gyllenhal), management and a degree-day model is needed as a decision and support tool. In response to this need, grazing exclosures with unique degree-days and stocking rates were established at weekly intervals in a central Montana alfalfa field during 2008 and 2009. Anal...

Degree-day requirements for alfalfa weevil (Coleoptera: Curculionidae) development in eastern Nebraska.

The alfalfa weevil, Hypera postica (Gyllenhal), is a serious, yet sporadic defoliator of alfalfa, Medicago sativa L., in Nebraska. A 2-yr study was conducted in 2005 and 2006 to test for variation in degree-day requirements by location in eastern Nebraska. Sampling took place along a latitudinal gradient in three regions of eastern Nebraska. Three fields were sampled in each region during the 2...