Influence ofGliocladium virenson Germination and Infectivity of Sclerotia ofSclerotium rolfsii

Abstract

(...) Positive correlation was found between the percentage of colonization of sclerotia by G.v. in soil and reduction of infectivity and germination when strain Sr-1 of S.r. was used. Rapid loss of viability and infectivity of sclerotia of strain Sr-1 was observed even at a low concentration of strain Gl-3. In contrast, sclerotia of strain Sr-109 recovered from soil amended with 3 × 10 3 cfu of Gl-3 per gram of soil were about 60% infective at 32 days. Although 100% of sclerotia of strain Sr-3 from soil amended with Gl-3 were colonized by the antagonist at all times, their germinability was not reduced after 24 days and only slightly reduced after 32 days (...)