Krecek, R.C.; Murrell, K.D.; Douglass, L.W.; Verwoerd, Daniel Wynand
(Published by the Government Printer, Pretoria., 1990)
Assessments were made of the influence of several microclimatic variables on the availability of third-stage larvae of Ostertagia ostertagi, on pasture herbage. Variables most closely related to recovery of larvae from the ...