TABLE 1.
Description of Trichoderma spp. used in this study
| Species and isolates | Sourcea |
|---|---|
| T. hamatum | |
| 20, 29, 46, 100, 104, 331, 337, 362, 382, 395, 402, 513, 546, 559, 610, 644, 665, 666, 672, 687, 691, 719, 728, 729, 753, 769, 781, 784, 794, 809, 897, 899, 945 | Suppressive potting mix |
| 204, 212, 229, 239, 255, 263 | Conducive potting mix |
| 961, 964, 1037, 1045, 1057, 1119, 1183 | Potting mix of unknown suppressiveness |
| T. harzianum | |
| 8, 71, 76, 77 | Campbell Research and Development, Davis, Calif. |
| 120, 311, 716, 887, 1220, 1224, 1238, 1241, 1246, 1269, 1323, 1346, 1357, 1359, 1364 | Suppressive potting mix |
| 84, 458, 478, 738, 743, 820, 852, 855, 1100 | Conducive potting mix |
| 955, 956, 972, 996, 1025, 1190, ss-bl | Potting mix of unknown suppressiveness |
| T. koningii | |
| 45, 107, 320, 569, 1351 | Suppressive potting mix |
| 232, 254 | Conducive potting mix |
| 973, 1086 | Potting mix of unknown suppressiveness |
| T. viride 123, 1409, 1410, 1415 | Suppressive potting mix |
| T. virens 611, 917, 1243, 1305, 1446 | Suppressive potting mix |
a
Isolated from composted hardwood bark mixes obtained from two commercial nurseries (Warner Nursery, Willoughby, Ohio, and Paygro Nursery, South Charleston, Ohio). Suppressive and conducive mixes suppress or do not suppress, respectively, Rhizoctonia damping-off in a radish bioassay.