Publications

cations in hemolymph and alimentary tract tissues of healthy and milky diseased european chafer (amphimallon majalis) larvae.	a study was made of certain cations present in hemolymph and alimentary tract tissues of healthy and diseased european chafer larvae and the spores of bacillus popilliae collected from diseased hemolymph. the major ions found in the hemolymph, in order of decreasing abundance, were potassium, magnesium, sodium, and calcium. hemolymph of diseased larvae contained relatively higher concentrations of sodium, potassium, magnesium, iron, and zinc than hemolymph of healthy larvae. concomitantly, the c ...	1973	4737854
male-specific ead active compounds produced by female european chafer rhizotrogus majalis (razoumowsky).	chemical investigation of a female balloon-like organ of the european chafer, rhizotrogus majalis (razoumowsky), with gc-ead has resulted in the identification of female-specific compounds, (r)-3- hydroxybutan-2-one, (2r,3r)-2,3-butanediol, and meso-2,3-butanediol that are specifically ead-active with male antennae. no behavioral role for any of the ead active compounds could be discerned with this species.	2003	12737273
comparison of tall fescue (cyperales: gramineae) to other cool-season turfgrasses for tolerance to european chafer (coleoptera: scarabaeidae).	three cultivars of tall fescue, festuca arundinacea schreb., were compared with three cultivars each of fine fescue (festuca spp.), kentucky bluegrass (poa pratensis l.), and perennial ryegrass (lolium perenne l.) to evaluate tolerance to root-feeding by european chafer grubs, rhizotrogus majalis (razoumowsky). potted turfgrasses were infested with initial densities equivalent to 33 or 66 grubs per 0.1 m2 on 19 august 2000. more grubs were added in late september and october, bringing the total ...	2003	14977131
efficacy of botanical insecticides from piper species (piperaceae) extracts for control of ruropean chafer (coleoptera: scarabaeidae).	biopesticides, including botanicals, can offer a safe and effective alternative to conventional insecticides for controlling major insect pests within an integrated pest management program. the current study highlights the practical application of a botanical insecticide for controlling a major insect pest of turfgrass: european chafer, rhizotrogus majalis (razoumowsky). greenhouse and field trials were conducted to test the efficacy of a botanical formulation based on black pepper, piper nigrum ...	2005	16022313
control decision rule for european chafer (coleoptera: scarabaeidae) larvae in field corn.	after greenhouse and outdoor microplot experiments, a critical density of two third instars per microplot for third instars of european chafer, rhizotrogus (amphimallon) majalis (razoumowsky), in corn, zea mays l., was derived. on average, the number of missing or damaged plants increased approximately 8% from zero to two larvae per 900 cm2. furthermore, 23 fields in 2 yr were sampled for larvae along transects by using a golf cup cutter as the sampling tool and the critical density of 0.2 larva ...	2006	16573326
susceptibility of four species of turfgrass-infesting scarabs (coleoptera: scarabaeidae) to bacillus thuringiensis serovar japonensis strain buibui.	bacillus thuringiensis serovar japonensis strain buibui experimental formulations containing cry8cal delta-endotoxin were evaluated in the field for the control of oriental beetle, anomala orientalis waterhouse; japanese beetle, popillia japonica newman; asiatic garden beetle, maladera castanea (arrow); and european chafer, rhizotrogus majalis (razoumowsky) larvae infesting turfgrasses. in 17 fall applications, control of a. orientalis and p. japonica was achieved at rates as low as 100 g of tox ...	2007	17972638
susceptibility of the european chafer (coleoptera: scarabaeidae) to entomopathogenic nematodes (rhabditida: steinernematidae, heterorhabditidae).	the european chafer rhizotrogus majalis (razoumowsky) feeds on turfgrass roots, causing major damage in the urban areas of northeastern north america. a laboratory study was conducted to determine the susceptibility of third-instar chafer larvae to four species of entomopathogenic nematodes (steinernema glaseri, s. feltiae, s. carpocapsae, and heterorhabditis bacteriophora). only s. glaseri was virulent, and only at high numbers (ld(50) = 294 nematodes/larva). prolonged contact with nematodes in ...	2001	19265891
variation in the laboratory susceptibility of turf-infesting white grubs (coleoptera: scarabaeidae) to biological, biorational and chemical control products.	white grubs are the most widespread and damaging pests in turfgrass habitats of the northeast usa, and their management is highly dependent on chemical pesticides. because this complex includes at least eight species, opportunities for pest management would be enhanced by understanding how susceptibility to control products varies across taxa. the objective of this laboratory study was to measure variation in the susceptibility of four species to 18 biological, biorational and chemical insectici ...	2010	19742452
imidacloprid as a contact arrestant for larvae of the european chafer, amphimallon majale.	manipulative studies of the behavioral response of soil-dwelling insects to insecticides and other antagonists are stymied by the difficulties of observing and interpreting interactions played out below ground. six experiments were carried out using x-ray radiography to quantify the movement of the european chafer, amphimallon majale (razoumowsky), larvae in response to imidacloprid and how this was affected by host plant cues and cold temperature.	2013	22926947
acute toxicity of plant essential oils to scarab larvae (coleoptera: scarabaeidae) and their analysis by gas chromatography-mass spectrometry.	larvae of scarab beetles (coleoptera: scarabaeidae) are important contaminant and root-herbivore pests of ornamental crops. to develop alternatives to conventional insecticides, 24 plant-based essential oils were tested for their acute toxicity against third instars of the japanese beetle popillia japonica newman, european chafer rhizotrogus majalis (razoumowsky), oriental beetle anomala orientalis (waterhouse), and northern masked chafer cyclocephala borealis arrow. diluted solutions were topic ...	2013	23448028
effect of european chafer larvae (coleoptera: scarabaeidae) on winter wheat and role of neonicotinoid seed treatments in their management.	a critical density of four third-instar larvae per 900 cm2 for european chafer, rhizotrogus (amphimallon) majalis (razoumowsky), in winter wheat, triticum aestivum l., was derived from small-plot greenhouse and field experiments conducted under favorable crop growing conditions at several ontario and michigan locations from 2001-2003. on average, plant weight was decreased by 14% and plant stand by 11% between zero and four larvae per 900 cm2. in a commercial field under moisture stress, a yield ...	2015	26470167