A comparison of two bioassays used to estimate the toxicity of lupin material infected with Phomopsis leptostromiformis.

Eighty-four lupin samples were tested for toxicity using two currently available bioassays. One utilizes sheep and the other nursling rats. There was an association between the results obtained by the two bioassays but 65% of the variance of the nursling rat bioassay results was not associated with the sheep bioassay results in the linear regression. Reasons for this poor correlation are suggested and discussed.