title: Salicylic Acid Induces Changes in Mango Fruit that Affect Oviposition Behavior and Development of the Oriental Fruit Fly, Bactrocera dorsalis.
abstract: The Oriental fruit fly, Bactrocera dorsalis (Hendel) is an important quarantine pest around the globe. Although measures for its control are implemented worldwide through IPM and male annihilation, there is little effect on their population. Hence, there is a need for new strategies to control this minacious pest. A strategy that has received negligible attention is the induction of 'natural plant defenses' by phytohormones. In this study, we investigated the effect of salicylic acid (SA) treatment of mango fruit (cv. Totapuri) on oviposition and larval development of B. dorsalis. In oviposition choice assays, gravid females laid significantly less eggs in SA treated compared to untreated fruit. Headspace volatiles collected from SA treated fruit were less attractive to gravid females compared to volatiles from untreated fruit. GC-MS analysis of the headspace volatiles from SA treated and untreated fruit showed noticeable changes in their chemical compositions. Cis-ocimene and 3-carene (attractants to B. dorsalis) were reduced in the headspace volatiles of treated fruit. Further, reduced pupae formation and adult emergence was observed in treated fruit compared to control. Increased phenol and flavonoid content was recorded in treated fruit. We also observed differential expression of anti-oxidative enzymes namely catalase (CAT), polyphenoloxidase (PPO) and peroxidase (POD). In summary, the results indicate that SA treatment reduced oviposition, larval development and adult emergence of B. dorsalis and suggest a role of SA in enhancing mango tolerance to B. dorsalis.
authors.affiliation: National Fellow Lab, Division of Entomology and Nematology, Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bangalore, Karnataka, India.
authors.forename: Kamala Jayanthi
authors.initials: KJ
authors.lastname: Pagadala Damodaram
authors.affiliation: National Fellow Lab, Division of Entomology and Nematology, Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bangalore, Karnataka, India.
authors.forename: Ravindra Mahadappa
authors.initials: RM
authors.lastname: Aurade
authors.affiliation: National Fellow Lab, Division of Entomology and Nematology, Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bangalore, Karnataka, India.
authors.forename: Vivek
authors.initials: V
authors.lastname: Kempraj
authors.affiliation: Division of Plant Physiology and Biochemistry, Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bangalore, Karnataka, India.
authors.forename: Tapas Kumar
authors.initials: TK
authors.lastname: Roy
authors.affiliation: Division of Plant Physiology and Biochemistry, Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bangalore, Karnataka, India.
authors.forename: Kodthalu Seetharamaiah
authors.initials: KS
authors.lastname: Shivashankara
authors.affiliation: National Fellow Lab, Division of Entomology and Nematology, Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bangalore, Karnataka, India.
authors.forename: Abraham
authors.initials: A
authors.lastname: Verghese
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism; D001522:Behavior, Animal / Q000187:drug effects*; D001681:Biological Assay; D002755:Choice Behavior / Q000187:drug effects; D005260:Female; D005419:Flavonoids / Q000378:metabolism; D005638:Fruit / Q000378:metabolism*; D007814:Larva / Q000187:drug effects / Q000254:growth & development; D031022:Mangifera / Q000378:metabolism*; D064367:Olfactometry; D010058:Oviposition / Q000187:drug effects*; D010572:Pest Control, Biological; D019800:Phenol / Q000378:metabolism; D020156:Salicylic Acid / Q000494:pharmacology*; D033621:Tephritidae / Q000187:drug effects* / Q000502:physiology*; D055549:Volatile Organic Compounds / Q000378:metabolism / Q000494:pharmacology
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D055549:Volatile Organic Compounds; D019800:Phenol; D020156:Salicylic Acid