Seasonal monitoring of fruit fly, Bactrocera zonata (Saunders) and its parasitoids Trybliographa daci on guava fruit from Sindh Pakistan
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2014, Vol 4, Issue 5
Abstract
Seasonal monitoring of fruit flies, Bactrocera zonata and Bactrocera dorsalis was carried out by collecting the infested guava fruits for recording the larval parasitoid under laboratory conditions; and weekly trap catches for fruit fly species were also recorded. The B. zonata and B. dorsalis pupae were collected from 01.11.2012 to 15.03.2013 at fortnightly interval. The data showed that B. zonata and B. dorsalis adult emergence was 65.67±1.69 and 5.54±2.35; where the female ratio dominates over the males. On their males (3.00±0.26) adult parasitoids emerged in a fortnight; and weekly fruit flies catches were 616.45±67.19/10 traps. There was significant difference in the adult emergence in larval parasitoid (16.26±1.16%) and female ratio was higher (9.16±0.84) than fruit fly trap catches between weeks (P<0.05). The species-wise insect catches for guava fruit fly indicates that seasonal weekly average fruit flies catches were 605.65 ± 66.32/10 traps. In case of B. dorsalis, during 1st week of November 2012, the catches were 21/10 traps which continuously decreased and reached lowest number of catches (6/10 traps) in the 4th week of February. This indicates that B. zonata population was markedly (P<0.05) higher than the B. dorsalis. There was positive and significant correlation between fruit fly infestation and relative humidity (r= 0.7244**), fruit fly infestation and temperature (r= 0.5299**), between B. zonata infestation and relative humidity (r= 0.7368**), between B. zonata infestation and temperature (r= 0.5215**), and between B. dorsalis infestation and relative humidity (r= 0.4356*), suggests a simultaneous increase in fruit fly infestation with increasing relative humidity and temperature.
Authors and Affiliations
Bhaikhan Solangi, Riffat Sultana, Nazir Ahmed, Muhammad Saeed Waganand, Abdul Rasool Abbassi
Keywords
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