1.

Avermectins (AVM) are macrocyclic lactones which have potent antihelminthic and insecticidal action. They are generally derived from the mycelia of
A. <i>Streptomyces avermitilis</i>
B. <i>B. thrunigiensis</i>
C. <i>P. flourescens</i>
D. <i>L. peruvianum</i>
Answer» B. <i>B. thrunigiensis</i>


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