Six of the most promising isolates were tested in on-plant and in-litter bioassays in January 2000. Several of the tested isolates provided 80-100% mortality within 10 days. Though sunn pest mortality occurred more rapidly among the in-litter assays, by day 15 sunn pest mortality was equally high in the on-plant assays. These results demonstrate the great potential of fungi for sunn pest integrated pest management. It may be possible to use them both in over-wintering sites and on plants in the field. Plans are underway to conduct small-scale pilot tests to further evaluate their efficacy under field conditions. The compatibility of fungi with non-target organisms and chemical pesticides are also planned for the future.