Efecto de algunos fungicidas sobre la interacción Rhizoctonia solani Kuhn-Micorriza vesículo arbuscular en soya, Glycine max Merril
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Abstract
With the object to evaluate in the soybeans crop behavior in the interaction of Rhizoctonia solani, vesicular-arbuscular mycorrhizae (VAM) and fungicides used to treatment of seed, two different soil preparations were used in the field trials: natural and chemically disinfected (Ditrapex-CE) and under greenhouse: using vapor- sterilized. Was utilized the fungicides Propamocarb, SN-84364, PCNB y Vitavax- 300. Be had into account the natural mycorrhizal flora and a source of Glomus manihotis introduced. R. solani reduced the emergence of soybean by 50%, the above-metioned pathogen was more agressive in disinfected soil. In the 15 days first the attack increased and reduced the VAM development in the natural soil. With the age of the plant the pathogen infection decreased. With relation by VAM is contrary the tendency. The presence of VAM, G. manihotis including, not increased significantly the dry mass and yield of the soybean. The fungicides diminished the VAM infection in both chemically and physically disinfected soil, whereas this does not ocurr in natural soil,SN-84364, on the other hand, increased the VAM infection. This product affected least the simbiosis in the disinfected soil. SN-84364 and PCNB exhibitited their great especifity against R. solani and Vitavax-300 a greater spectrum of action.
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marina1987efectoacta
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| Journal | acta agronómica |
| Year | 1987 |
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