Abstract:
Growth and sporulation of Fusarium oxysporum Schlect, an entomogenous fungus
of the rice plant hopper Nilaparvata lugens Stal were superior in oat meal agar
closely followed by potato dextrose agar. Czapeck's and Richards' agar media
were lesssuitable. In all these media, only microconidia were produced. Maximum
number of spores were produced on the fifth day, after which the spore production
decreased. Virulence was highest in spores of four and five-day-old cultures and
spores of cultures more than five day old showed decreasing virulence.
