Comparative histology of parasitized and unparasitlzed hosts was used to
evaluate proposed mechanisms of host regulation by endoparasitotd, Parasitization of
Spodoplera littora/is larvae by the endoparasitold Microplilis rufivenln's w s found to
C',:.'.e the destruction of female imagiii?b1e gonads and pathc:ogical change~ in tht;
nervous system, These histopatho!ogical changes were reflected on tile locomotory
and feeding activities, This regulative endoparasitoid not only distract t e nervous
system, as a juvenile structure, but also annihilate the female gonads as an
imaginable structure,