The within-field spatial distribution of beneficial arthropods was assessed using two-dimensional grids of pitfall traps and suction sampling across two winter wheat fields of 4 and 16 ha, before and after an application of dimethoate. An unsprayed 6 m wide buffer zone was left around half the edge of the larger field. Arthropod numbers fluctuated to varying extents prior to spraying. Two speci...

s are listed in alphabetical order by the last name of the senior author. Parasitoids of Myzus persicae and Aulacorthum solani on pepper crops in British Columbia Susanna Acheampong, David R. Gillespie and Don Quiring Pacific agri-Food Research Centre (Agassiz); 6947 #7 Highway; P. O. Box 1000; Agassiz, BC V0M 1A0; Canada, [email protected] A survey of parasitoids of three clones of Myzus p...

Aphid parasitoids are common in Brazilian wheat fields, and parasitize aphids at the wheat tillering stage. However, there is little information available about when this natural enemy occurs in wheat crops. This study investigated the initial occurrence of aphid parasitoids in four commercial wheat crops in northern Paraná during the 2009 crop season. We installed two Malaise traps at each whe...