Abstract
Background: Carica papaya L. (family Caricaceae) is one of the popular fruits in world. As with many tropical and subtropical crops, papaya is host to various pests and pathogens. More than 700 papaya plants were infected by unknown virus. The incidence of plants infected with leaf curl disease was 50-75%, but the infection was very severe. A typical curling and thickening were observed. The infection spread by air and rainwater to nearby papaya farms. Methods: This study reports the effect of BamO formulation on the biotic stress of the Papaya plant. BamO was sprayed on the plants and its effect was observed. After six days of Bam O treatment, new healthy leaves were observed on the plants. Result: The yellow and old leaves were dropped from the plants. After 2 months of the treatment BamO, the fruits were elongated and having similar shapes without uneven bumps. The green fruits without any dark or light spots were observed in BamO treated plants. Priming effect was observed by GCMS analysis, the 3 methylsalicylic acid increased quantity was observed in 7th day and 30th day samples of BamO treated plants. The BamO treatment not only increased the immunity of the plant but found effective in increasing yield of the papaya plants. In BamO treated papaya plants, the total yield obtained was 92.10 tonnes per 444 plants.
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