Population Dynamics of Apple Maggot (Diptera: Tephritidae) in South Central Pennsylvania

Abstract

The apple maggot, Rhagoletis pomonella (Walsh), was monitored with baited yellow panels and red spheres in commercial orchards, abandoned orchards, and unsprayed backyard apple trees in 1998 and 1999. Apple maggot adults were captured in all apple habitats, but the capture levels in the abandoned orchards and unsprayed backyard trees tended to be higher than in the commercial orchards. Peak capture occurred between mid-July and late August in both years. Emergence cages seeded with infested fruits were used to investigate bivoltinism, which was observed in both years.

Seasonal population trend of the peach fruit fly (PFF),Bactrocera zonata(Saunders) (Diptera: Tephritidae), in Assiut, Northern Upper Egypt

“…This led us to believe that males may have fought together to win with such female. The seasonal population trend of Bactrocera species was extensively studied by several investigators in various parts of the world (Clarke et al 2001;Chen et al 2002;Ravikumar 2006;Abdullah 2008;Amin 2008;Rattanapun 2009). Most of them came to the conclusion that PFF, in general, increases its numbers during the period from July to early November with 2-3 peaks during September and October, while in the rest of year the flies were observed in few numbers or completely disappeared due the unsuitable weather factors.…”