Efficacy of biocontrol agents and chemicals against early blight of potato caused by Alternaria Spp.

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This study shows biocontrol agents and chemicals reduce early blight severity in potatoes, indicating potential for disease management.

Hexaconazole significantly reduced disease severity to 23.2%, demonstrating its effectiveness against early blight.
Trichoderma harzianum exhibited the highest inhibition rate at 82.8% among bio-agents tested for Alternaria spp.
Azoxystrobin and difenoconazole combined reached an inhibition of 86.5% at 100 ppm, underscoring chemical efficacy.
In vitro methods confirmed the superior performance of hexaconazole at 91.7% inhibition for controlling early blight.

Rana et al. (2025) studied this question.

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