The objectives of this project were: 1. To identify candidate pathogens for the biocontrol of purple nutsedge ( Cyperus rotundus). 2. To determine the potential of candidate pathogens as augmentive and inundative biocontrol agents of purple nutsedge in cotton. 3. To determine the feasibility of using combinations of pathogens either as a "cocktail mixture" (to broaden the spectrum of weeds affected) or applied at different times (to determine possible synergistic interactions in terms of weed control). 0 2 4. To define the conditions under which potential biocontrol pathogens are most likely to succeed and not succeed. 5. To work with weed scientists to determine how biocontrol might best be integrated into weed management systems.