Armillaria - Trichoderma interaction and management of armillaria root rot of tea (Camellia sinensis (L) O. Kuntze)
1998
Otieno, W.
In an experiment to test if an in vitro antagonism of three isolates of Trichoderma spp. to Armillaria was reproducible in vivo, their introduction into the soil with or without concomitant application of coffee pulp, resulted in sustenance of high population densities of the antagonists for a long time. Addition of coffee pulp to the planting holes as an organic amendment on its own also resulted in high population densities of indigenous Trichoderma spp. However, the high population densities of the Trichoderma did not have deleterious effect on the pathogen assessable as loss in viability or infectivity of its soil-borne inoculum. The pathogen was still recovered in a viable state from infested pieces of roots in which its inoculum was originally introduced into the soil after 3 years and infectins from the inoculum were recorded in potted plants even after 4 years. Over the same duration, infections from the inoculum were still resulting in death of experimental plants grown in the field under all the treatments.
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