Publications

seasonal prevalence of gastrointestinal nematodes of beef calves grazed on irrigated pastures in the lower sacramento valley of california.	two worm-free calves were allowed to graze on irrigated pasture with a naturally infected herd for each of 34 one-month periods from november 1979 to august 1982. after each grazing period, the calves were transferred to a cement-floored pen for 3 weeks and then were euthanatized and necropsied. ostertagia ostertagi and cooperia oncophora were the most prevalent species of nematodes recovered. adults and larvae of ostertagia spp and cooperia spp were most numerous in winter and spring and least ...	1988	3377319
seasonal occurrence of infective nematode larvae in california sierra foothill pastures grazed by cattle.	worm-free holstein tracer calves were used to assess the seasonal variation in number and course of development of nematode parasites of cattle on an irrigated pasture located in the california sierra foothills. the most common genera of nematodes found in the abomasum and small intestine were ostertagia and cooperia, respectively. the infective ostertagia larvae on herbage were most numerous in early spring and lowest in summer months. arrested development of ostertagia occurred in mid-to-late ...	1986	3752675