Histology of infection of hydrilla verticillata by macrophomina phaseolina gary f joye and rex n paul2 abstract infection of hydrilla verticillata by macropho mina phaseolina was investigated using scanning and transmission electron microscopy sprigs of plants in petri plates were inoculated with suspensions of fungal hyphae. Infection of hydrilla verticillata by macrophomina phaseolina was investigated using scanning and transmission electron microscopy sprigs of plants in petri plates were inoculated with suspensions of fungal hyphae samples of inoculated and noninoculated plants were taken over time. An isolate of macrophomina phaseolina tassi goid has demonstrated potential as a boicontrol agent for the noxious submersed aquatic macrophyte hydrilla verticillata lf royle in recent studies the purpose of this study was to follow the histology of infection of h verticillata by m phaseolina with particular attention to the chronology of attachment penetration and colonization . An isolate of macrophomina phaseolina tassi goid has demonstrated potential as a boicontrol agent for the noxious submersed aquatic macrophyte hydrilla verticillata lf royle in recent studies the purpose of this study was to follow the histology of infection of h verticillata by m phaseolina with particular attention to the chronology of attachment penetration and colonization during