Fitopatologia Brasileira (2003) 28, 101-105

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Reginaldo G. Mafia, Acelino C. Alfenas, Luiz A. Maffia, Gizella M. Ventura and Eugênio A. Sanfuentes (2003)
Encapsulamento de Trichoderma inhamatum para o controle biológico de Rhizoctonia solani na propagação clonal de Eucalyptus
[Encapsulation of Trichoderma inhamatum for the biological control of Rhizoctonia solani in clonal propagation of Eucalyptus]
Fitopatologia Brasileira 28 (1), 101-105
Abstract: A new system of encapsulating Trichoderma inhamatum in sodium alginate was developed for controlling Rhizoctonia solani blight of Eucalyptus spp. cuttings/mini-cuttings used for rooting. In this system, simpler materials and apparatus efficiently replaced the peristaltic pump, increasing pellet production from 594 pellets/min to approximately 6,734 pellet/min. An isolate of T. inhamatum (UFV-3) was encapsulated in pellets containing wheat bran, rice husk, oat bran, eucalyptus leaf or maize meal as food base at a concentration of 50g/l. In the second step, the best food base was evaluated at the concentrations ranging from 0 to 60 g/l. The pellets were added to R. solani infested (2 mg-macerated mycelium/g) eucalyptus rooting substrate at the rate of 2% (w/w) and the saprophytic activity of the pathogen was quantified with a baiting technique. The pellets containing wheat bran, which maximally inhibited R. solani, were used to determine the minimum pre-incubation and competition period for pathogen suppression. Increasing food base concentration in the pellets increased suppression of R. solani. Additionally, there was a significant positive interaction between food base concentration in the formulation and pathogen suppression.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
Full text of article
Database assignments for author(s): Acelino C. Alfenas, Eugenio A. Sanfuentes, Luiz A. Maffia

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
formulation/storage of bioagents

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Rhizoctonia solani Eucalypt (Eucalyptus)
Trichoderma inhamatum (antagonist) Rhizoctonia solani Eucalypt (Eucalyptus)