Fitopatologia Brasileira (2007) 32, 501-503

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Trazilbo J. Paula Júnior, Rogério F. Vieira, Waldir C. Jesus Junior, Bernhard Hau and Hudson Teixeira (2007)
Is it necessary to soak rice grains to prepare Rhizoctonia solani AG-4 inoculum?
Fitopatologia Brasileira 32 (6), 501-503
Abstract: A study was conducted to evaluate the effects on the development of root rot on common bean, cv. 'Dufrix' after treatment with four volumes of water (0, 30%, 60%, and 90%, v/w) added to rice grains previously immersed in water for 24 hours before autoclaving and colonization of grains by Rhizoctonia solani AG-4. Colonized rice grains and non-infested rice grains were mixed in pots with sterilized soil and sand (2:1), where beans were sown. Based on results of area under plant emergence curve, plant height, plant dry weight, and disease severity, we conclude that inoculum is more effective in causing disease when no water is added to the rice grains before autoclaving.
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Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

Pest and/or beneficial records:

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

Rhizoctonia solani Beans (Phaseolus)