2 research outputs found
A bionomic study of hymenopteran parasitoids at the Taman Beringin Landfill in Kepong and a Poultry Farm in Sungai Pelek, Selangor, Malaysia
A four-month cross-sectional study found five species of parasitoids parasitizing
puparia of filth flies breeding at the Taman Beringin landfill in Kepong and a
poultry farm in Sungai Pelek, Sepang, Selangor. Effect of monthly rainfalls
towards density of flies and percentage of parasitoids emerging from collected
puparia were also analyzed. Spalangia sp. was the most common, consisting of
Spalangia endius Walker, S. cameroni Perkins and S. gemina Boucek. Other
parasitoids collected were Pachycrepoideus vindemmiae Rondani and
Exoristobia phillipinensis Ashmead. The parasitized fly hosts were Musca
domestica Linn. and Chrysomya megacephala Fabricius. S. endius was the
most common parasitoid attacking M. domestica at both locations. M. domestica
was the most common fly found at the Sg. Pelek poultry farm whereas C.
megacephala was the most numerous at the Taman Beringin landfill. During
heavy rainfall month of November 2003, density of flies were high whereas the
emerging parasitoids were low at both landfill and poultry farm. The present
study revealed the endemic presence of parasitoids especially S. endius in
both poultry farm and garbage landfill and the potential of the parasitoid
species in fly control in Malaysia
Descriptions of the larval instars of chrysomya rufifacies (Macquart) (Diptera: Calliphoridae), a species of forensic importance in Malaysia
The anatomical structures of the first, second and third instars of Chrysomya rufifacies (Macquart) were examined by light microscopy. Observations were documented on the three main characteristics; the cephalopharyngeal skeleton,
anterior spiracle and posterior spiracle. The first instar larva bore cornuae of fairly pigmented delineation with slim hypostomal sclerite and distinct dental sclerite. First instar did not have obscured anterior spiracle but posterior spiracles were obscured with thin lining of opened peritreme. Intersegmental spines were evident. The second instar larva displayed a prominent anterodorsal
process approaching closer to hypostomal sclerite while upper margin of the dorsal cornua was slightly pigmented. Each anterior spiracle consisted of nine to ten papillae, arranged in a single row. Peritreme of the posterior
spiracle thick, opening at the end of peritreme was not wide and confined to two spiracular slits. The third instar larva showed a prominent arch of the ventral cornua with broad and bold appearance. It approached the dorsal cornua and became narrow at the incision median. The anterior spiracle consisted of a single row of nine to ten papillae while intersegmental spine could be identified with one to three dark pigmented tips. A dark pigmented and wide periterime was observed confining three short and thick spiracular slits while button was poorly pigmented. The most distinctive feature of this second and third instar larva was the slender, thorn-like tubercle with numerous
spined tips on the middle line segment of the body. These findings provide identification features of C. rufifacies larvae instars