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Alternaria fruit rot is a major disease caused by  Alternaria alternata  (Fr.) Keissl., a prolific fungal pathogen. Among post-harvest diseases of tomato, fruit rot induced by  A .  alternata  is the most damaging. Antifungal agents are widely used to control post-harvest management of tomato fruits. However, negative impacts of fungicidal residues in edible fruits and vegetables on human health cannot be over ruled. Eco-friendly ways of controlling Alternaria rot in tomato fruits offer a novel way of tomato rot management. The current study proposes an alternate method in controlling tomato fruit rots through  Zanthoxylum armatum  DC essential oil (EO) application. Gas chromatography-mass spectrometry profiling showed eucalyptol and sabinene as major components of  Z .  armatum  EO. Furthermore, EO applied (0.5–4.5 μl/ml) showed significant inhibition of  A. alternata  growth ( p  &amp;gt; 0.05) at 4.5 μl concentration tested. Lipid peroxidation assays revealed significant reduction in membrane damage in tomato fruits treated by EO compared to alone inoculated fruits with  A .  alternata . Elevated activities of superoxide dismutase, catalase, ascorbate peroxidase, and glutathione reductase coupled with enhanced antioxidants such as ascorbic acid, glutathione, proline, and total phenols in EO-treated fruits may be linked with better fruit rot management than control fruits inoculated with  A .  alternata -induced rot alone. Mycelia and spore production was dramatically reduced in EO applied tomato fruits over  A .  alternata  alone in tomato fruits ( p  &amp;gt; 0.05). Interestingly, free radical scavenging activities of EO applied tomato fruits showed significant improvement compared to only pathogen-inoculated tomato fruits. Findings propose practical utility of  Z .  armatum  EO as a plant-based antifungal for post-harvest management of Alternaria rot in tomato fruits.

Post-harvest Management of Alternaria Induced Rot in Tomato Fruits With Essential Oil of Zanthoxylum armatum DC