Qualitative and quantitative losses on some commercial varieties of mango due to Bactrocera correctus Bezzi (Diptera : Tephritidae) in South Gujarat.
Kumar S., Patel C. B., Bhatt R. I., Padhiar B. V., Patel B. G.
Author Affiliation: Agriculture Experimental Station, Gujarat Agricultural University, Paria, District Valsad, Gujarat 396 145, India.
Pest Management and Economic Zoology 2 : 91-92
Abstract : Four promising mango varieties namely, Alphonso, Rajapuri, Kesar and Dashehari were evaluated during 1990-93 for their susceptibility to Bactrocera correctus [B. correcta] in Paria, Gujarat, India. Fruit infestation, larval population in infested fruit and loss were considered for varietal screening. TSS, total sugars, acidity, pulp and peel of different varieties were correlated with fruit fly infestation. Cv. Alphonso suffered the most significant damage and recorded 26.7% fruit infestation, (2.7 larvae/fruit). The weight loss was greatest (17.2 kg/tree) in cv.Kesar, but on a par with cv. Alphonso (16 kg/tree). In terms of monetary loss, cv. Alphonso ranked first (Rs 120/tree), followed by cv. Kesar. Cv. Dashehari suffered the least with respect to all the parameters studied. Total sugars showed significant positive correlation with fruit fly infestation (r = 0.8190), but the cumulative impact of all the chemical factors on fruit fly infestation was non-significant.