Publications

studies on the surface coat (glycocalyx) of the dauer larva of anguina agrostis.	imprints of the surface coat (glycocalyx) from the cuticles of living second stage dauer larvae (dl2) of anguina agrostis (syn. a. funesta) have been examined using incident light fluorescence microscopy and scanning electron microscopy. these surface coats contain residues of n-acetyl-d-glucosamine which were detected by treatment with wheat germ agglutinin labelled with either fluorescein or rhodamine. they also contain protein which was demonstrated by treatment with either pepsin or trypsin. ...	1989	2503458
responses of the plant parasitic nematodes rotylenchulus reniformis, anguina agrostis and meloidogyne javanica to chemical attractants.	rotylenchulus reniformis, anguina agrostis and meloidogyne javanica respond differently to gradients of chemical attractants. in chemotaxis assays performed on agarose plates, r. reniformis l2 larvae oriented their movement to several common inorganic salts, cyclic amp and amp, as well as to germinated host plant seeds. m. javanica l2 larvae were attracted to germinated seeds, but not to the salts tested, and a. agrostis dauer larvae were not strongly attracted to any of 12 different tested agen ...	1985	2993986
hepatic damage in sheep fed annual ryegrass, lolium rigidum, parasitised by anguina agrostis and corynebacterium rathayi.	annual ryegrass (lolium rigidum) parasitised by anguina agrostis and corynebacterium rathayi causes neurological signs and brain lesions thought to be associated with a vasoconstrictor effect of the toxic grass. in three separate experiments of six to 112 days duration parasitised ryegrass was fed to 21 adult sheep. the concentrations of many blood constituents were examined, liver biopsies taken, necropsies performed and tissues other than brain examined by light and electron microscopy. the in ...	1982	7079596
endogenous toxins and mycotoxins in forage grasses and their effects on livestock.	plant toxins are the chemical defenses of plants against herbivory. grasses have relatively few intrinsic toxins, relying more on growth habit to survive defoliation and endophytic fungal toxins as chemical defenses. forage grasses that contain intrinsic toxins include phalaris spp. (tryptamine and carboline alkaloids), sorghums (cyanogenic glycosides), and tropical grasses containing oxalates and saponins. toxic effects of these grasses include neurological damage (phalaris staggers), hypoxia ( ...	1995	7608026
identification of seed gall nematodes of agronomic and regulatory concern with pcr-rflp of its1.	a molecular analysis of eight described species of seed gall nematode, along with six undescribed isolates from different hosts, has revealed a strong association between nucleotide sequence polymorphism and host status. each anguinid nematode associated with a unique host produced a unique pcr-rflp pattern for the its1 region. anguina species that had been synonymized in the past, anguina agrostis, a. funesta, and a. wevelli (afrina wevelli), were readily discriminated. two undescribed species ...	2001	19265880
a comparative analysis of extraction methods for the recovery of anguina sp. from grass seed samples.	four procedures were compared in their efficacy to extract juveniles of anguina agrostis from commercial grass seed. the procedures included those currently used by the state regulatory laboratories of oregon and california, as well as new tests developed to determine juvenile viability for the phytosanitary certification of fumigated grass seed. eleven seed lots of agrostis tenuis (bentgrass) and dactylis glomerata (orchardgrass) naturally infested with varying levels of juveniles of anguina we ...	1999	19270928
epidemiology of anguina agrostis on highland colonial bentgrass.	the epidemiology of anguina agrostis was investigated in field plots of colonial bentgrass (cv. highland), agrostis tenuis, near corvallis, oregon. each october from 1990-92, nylon mesh pouches, each containing 10 galls, were buried in the field or placed on the soil surface in microplots. pouches were collected monthly or bimonthly between december and june and nematodes per gall counted. nematode egression from galls began in late march and was completed by mid-may, corresponding to the period ...	1994	19279898
wheat germ agglutinin bound to the outer cuticle of the seed gall nematodes anguina agrostis and a. tritici.	the presence of wheat germ agglutinin (wga) on the cuticular surface of the seed gall nematodes anguina agrostis and anguina tritici was demonstrated, and the nature of its binding was examined. crude extracts from the cuticles of a. tritici agglutinated human red blood cells, and only n-acetylglucosamine (glucnac) inhibited the agglutination. distribution of the lectin was visualized by treating live infective juveniles (j2) with rabbit anti-wga antibody and staining with fluorescein isothiocya ...	1991	19283154
a role for the 'excretory' system in secernentean nematodes.		1988	19290243
responses of anguina agrostis to detergent and anesthetic treatment.	the infective dauer juvenile (dj2) of anguina agrostis, a stage capable of surviving desiccation, is up to sixfold more resistant to the detergent sodium dodecyl sulfate than are freshly hatched juveniles or adult males, and twofold more resistant to the anesthetic phenoxypropanol. thus, the dj2, like dauer stages of other species, may also be more resistant to various types of environmental stress in its natural habitat. in a. agrostis, however, resistance appears to be acquired gradually durin ...	1985	19294078
the influence of environmental factors on the respiration of plant-parasitic nematodes.	respiration of selected nematode species was measured relative to co level, temperature, osmotic pressure, humidity, glucose utilization and high ionic concentrations of sodium and potassium.in general, respiration was stimulated most by the dominant environmental factors at levels near those expected in the nematode's "natural" habitat. soil-inhabiting nematodes utilized o, most rapidly with high (1-2%) co whereas a foliar nematode (aphelenchoides ritzemabosi) did so with 0.03% co, the concentr ...	1970	19322313
heat tolerance and aging of the anhydrobiotic seed gall nematode with sem observations.	the seed gall nematode, anguina agrostis, feeds and reproduces within the developing ovaries of bentgrass seeds and overwinters in seed galls as anhydrobiotic juveniles. these dormant juveniles can survive within the seed gall for many years. in this dehydrated state, they are more tolerant to extreme environmental conditions than are their hydrated counterparts. nematodes in seed galls were exposed to various high temperatures (80 to 160°c) for time intervals of 5 to 30 min. survival decreased ...	2013	23589659