Fig. 8From: Toxicity evaluation of Aphidicidal crystalliferous toxins from Bacillus thuringiensis strains: a molecular studyAphidicidal Bt strains were re-isolated from the dead aphids to fulfil Koch’s postulate. A typical white and opaque and round colony morphology was prominent. Crystal staining of Bt re-isolated from dead A. gossypii and A. punicaeBack to article page