This research study was defined the infestation of mango by seasonality occurrence range of Bactrocera dorsalis in three different mango cultivars in sindh province of Pakistan during 2013-2014. Experiment was conducted on major three varieties of mango Chunsa, Sindhri, Beganpali, Data were noted on calculating in good physical shape and pest-ridden mango fruit; casually collected from major mango growing areas of sindh. Rearing the fruit flies under controlled conditions in Laboratory. Collected the reared fruit flies from different cultivars and calculate the infestation. The highest infestation was found on Beganpali and Sindhri variety 85%, followed by Chunsa 80% during June, July and August, respectively, during peak of functional time of ripening of varieties, while same as both years the least infestation was found on Beganpali variety during the June and July, because it is late variety during early months of season it is in immature form so because of that it is less infested, during whole season of mango the infestation was significantly different (F 54.05, df 52, p<0.5). The highest number of flies emergence were found from Beganpali (60.9%) followed by Sindhri variety (43.2%), while least No.of emergence found 6% from Sindhri variety (6%) during September. Ratio of fruit flies like B. dorsalis 54.7%, from Beganpali, followed by Sindhri variety 41.6% (F 53.24; dF 51, 108; p=0.29) during mean functional time of season. While less no. of B. dorsalis were 3% in September. The fecundity and fertility results were in significant in all varieties. The occurrence of B. dorsalis in whole season 94% which shows the seasonality range of oriental fruit fly and major host mango. The highest survival 89.64% was found on Chunsa followed by Sindhri 87.17 and Beganpali 70.36%, these result clearly indicate the range of B. dorsalis in all cultivars of mango which is significantly different (p<0.005).The adult occurrence during whole mango season shows the linear-correlation between interval of time of host and pest occurrence, The overtone between mango fruit and oriental fruit fly was strongly associated [R2 = 79.9%, P = 0.000]. Linking between host mango and B. dorsalis showed durable maintenance for the host-pest guess (HPH) with inclusive co-efficient of determination [75.4%, P = 0.000]. It was determined that the incidence of oriental fruit fly or other Bactrocera species was recorded in all the three cultivars throughout their fruity mango season; it was considered as life-threatening for management host fruit.
Novelty Statement | This study makes it abundantly evident how the host fruit (mango), which is alarmingly vulnerable to fruit flies due to its seasonality, is the next fruit variety. However, as mango season comes to a close, some populations of Bactrocera species rapidly decline since there is a lack of host food and they are attempting to oviposit.