PJB-2019-292
EXOGENOUS APPLICATION OF PLANT EXTRACTS AND SALICYLIC ACID TO MITIGATE CUCUMBER MOSAIC VIRUS AND APHID POPULATION IN CUCUMBER
Rashida Perveen
Abstract
Twenty cucumber cultivar were evaluated for resistance to cucumber mosaic virus (CMV) under greenhouse and field conditions. CMV disease severity was recorded with a disease rating scale and CMV was detected with enzyme linked immunosorbent assay. Salicylic acid (SA) was also evaluated for disease management. Systemic acquired resistance was observed by measuring total phenolics and protein contents. The cultivar screening results showed that only two lines, ‘Beit-Alpha’ and ‘Durga’, were resistant to CMV, with 10% and 13.33% disease severity, respectively. Exogenous application of SA significantly increased total phenolics and protein content compared to control in greenhouse and field experiments. SA higher concentration was most effective at inhibiting virus replication and disease severity. CMV severity correlated with the aphid population, and plant extracts and detergent reduced the aphid population and disease severity, with neem extract being the most effective. So, application of SA and plant extracts are good strategies for CMV management.
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