Monitoring Pasture Infectivity and Pasture Contamination with Infective Stages of Dictyocaulus viviparus
The technique for the estimation of pasture larval contamination by the examination of herbage is presented. Samples are taken near to faecal pats where the larvae are expected to be concentrated; a second sample taken at least 100 cm from the faecal pat provides information on the horizontal distribution of the pasture contamination.
The bile-agar technique for herbage samples is compared with results obtained with tracer calves. It is concluded that the two parameters are not directly comparable, nevertheless they both provide useful information on the presence of infective stages in the pasture.
KeywordsMigration Agar Expense Bronchitis ECSC
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