abstract the syrphidae family (known as hover flies or flower flies) is one of the largest families of diptera with almost 6000 species. adult flies feed on nectar and pollen of flowers and they are crucial agent in pollinating process. the larvae of many species of syrphidae are predators of aphids and play an important role in biological control of pests. in the following faunestic investigat...

The phenology and sex ratios of three hover fly species on Canterbury farmland, New Zealand were recorded weekly from five yellow watertraps from October 15, 1993 to January 31,1997. Gut fullness, egg number and pollen content were recorded weekly from September 8, 1994 to July 25, 1996. Catches of Melanostoma fasciatum (Macquart) and Melang\ma novaezelandiae (Macquart) were higher during the s...

Pollinator communities are composed of diverse groups insects, with radically different life histories and resource needs. Blow flies known to visit a variety economically important crop plants. Larval blow develop by feeding on decaying animals. Some fruit growers place carrion farms during the flowering season attract adult (Calliphoridae). However, efficacy these “stink stations” has not bee...

Materials and methods: On 15 British farms, invertebrate communities were trapcollected (14 per year), counted, and sorted into species groups. Lawsonia serological tests were conducted and total DNA was extracted from pig feces; DNA was also extracted from adult flies, pupae, and larvae samples and viscera of Blatta species. Each DNA sample was tested for L intracellularis by polymerase chain ...

Performance of the UAVs for a particular application can be enhanced by hybrid design, where take-off, hover, and landing happen like rotary-wing UAVs, flies fixed-wing UAVs. A backstepping controller an adaptive are designed trajectory tracking payload delivery in medical emergency or substance vaccine presence wind gust. Simulation results show that effectively tracks during entire flight env...

Abstract Host-parasitoid interactions are complex. A parasitoid can change its host’s behavior by direct infection or simply presence in the shared environment. In red imported fire ant (RIFA, Solenopsis invicta ), workers display defensive postures to avoid potential parasitism when decapitating flies ( Pseudacteon spp.) hover above them. addition changes of individual ants, RIFA colonies limi...

Trimenia moorei (Oliv.) Philipson is an andromonoecious liane with >0.40 of the total flower buds maturing as bisexual flowers. Male and bisexual flowers are strongly scented with pollen, anther sacs and receptacle scars testing positively for volatile emissions. Scent analyses detect over 20 components. The major fatty acid derivative is 8-heptadecene, and 2-phenylethanol dominates the benzeno...