| Abstrakt: |
Puccinia arachidiscauses rust, which is one of the most important peanut foliar diseases in the world, particularly in Burkina Faso. In favourable conditions, rust can cause serious damage, and lead to notable crop losses in fields. For sustainable peanut production, alternative control strategies including biological control methods for integrated disease management are needed to control rust. Thus, we investigated the effectiveness of Akanthomyces lecanii, hyperparasite of P. arachidisfor the biological control of peanut rust in Burkina Faso. Our results revealed that a conidial suspension of A. lecaniireduces the germination rate of P. arachidisurediniospores within the range of 55.67 to 59.34%, compared to the distilled water control. In addition, leaf treatments with the conidial suspension of A. lecaniisignificantly reduced the severity of rust on detached leaves and peanut plants compared to the distilled water control. We found that the rust severity on the treated leaves and plants were always lower than in the control, regardless of the pathogen isolate. These disease severities did not exceed 13% in the treated leaves and plants but could reach 45.5% in the control. From our findings, weight of pods was high in treated peanut plants compared to those of the control. The A. lecaniispores is promising tool in biocontrol of peanut rust, and could be used to promote organic farming in West Africa. |
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