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...

Three species of Hypera (H. eximia LeConte, H. postica Gyllenhal, and H. nigrirostris F.) exhibit variable leg morphologies and swimming behaviors. We present morphometric and time lapse video data to document the function of each leg in the swimming behaviors of these weevils. Comparisons weremade betweenH. eximia and two congeneric species that do not have the capacity to swim.Morphometric an...

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...

Since its description based on a single female from the Maritime Alps in France, no other localities of this enigmatic alpine species have become public. In scree slope Valais at high montane altitude Hypera temperei Hoffmann, 1958 was discovered for first time elsewhere, Switzerland. The species’ biology is unravelled, habitat described, and photographs male, larvae pupa are presented. re-inve...

The alfalfa weevil Hypera postica (Gyllenhal) (Coleoptera: Curculionidae) is a major pest of worldwide. In Spain, insecticide sprayings are mainly used for control with low efficacy. As potential more sustainable method, we determined the effectiveness an winter cutting reducing populations in spring and its interaction parasitism rate due to Bathyplectes spp. (Hymenoptera: Ichneumonidae). Fort...

Nucleotide sequence data were generated from the gene regions COI, 16S, and arginine kinase to assess genetic variation within the Palearctic parasitoid, Microctonus aethiopoides, reared from Sitona discoideus, S. hispidulus, and Hypera postica collected from two proximate locations in Mediterranean France. Partitioned Bayesian phylogenetic analyses of the molecular data provided strong support...