Abstract
Bactrocera dorsalis Hendel, (Diptera: Tephritidae) is one of the serious fruit pests in Sri Lanka. The present study aims to investigate the abundance of B. dorsalis adults and their infestation levels on Willard (Wld) and Karutha kolomban (Kc) mango varieties grown in main bio-climatic zones of Sri Lanka.The study was conducted from September 2020 to February 2021 in 08 study sites of 04 main bio-climatic zones. In every month, flies were collected from field traps. Infested fruits were also collected from study sites and fruit fly infestation levels and adult emergence were studied in the laboratory. The significance levels in the variations of percentage infestation, adult emergence and abundance of caught flies were compared among varieties, study sites, and with the climatic variables. Mean weight (g) of the tested mango fruits were (112.71 ± 1.78) g and (290.75 ± 4.23) g for Wld and Kc respectively. The intermediate zone recorded the highest percentage of average infestation (Wld, p>0.05; Kc, p
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