Distribution and Occurrence of Cotesia rubecula (Hymenoptera: Braconidae), a Parasite of Artogeia rapae in Washington and Oregon

1992 ◽  
Vol 85 (3) ◽  
pp. 739-742 ◽  
Author(s):  
K. D. Biever
1992 ◽  
Vol 27 (1) ◽  
pp. 5-18 ◽  
Author(s):  
K. D. Biever ◽  
R. L. Chauvin ◽  
G. L. Reed ◽  
R. C. Wilson

The three key lepidopterous pests of cruciferous crops, Artogeia rapae (L.), Plutella xylostella (L.), and Trichoplusia ni (Hübner) were monitored throughout the growing season at several locations in Washington and Oregon in 1986 and 1987 on collard plants. Populations of these pests differed markedly from location to location and between years. Artogeia rapae was the most abundant, P. xylostella was next in abundance, and T. ni the least abundant and on many dates it was not observed. Seven species of parasitoids were recovered and rates of parasitization varied significantly over time and among locations. Diadegma insulare (Cresson) was the most abundant parasitoid of P. xylostella. It parasitized up to 100% (range 0–100) and accounted for 74–100% of the total parasitization. Cotesia rubecula Marshall was the dominant species attacking A. rapae in Washington (0–50% parasitization) and accounted for 32–100% of the total parasitization. The only parasitoid species recovered from T. ni was Voria ruralis (Fallen) which parasitized from 0–14% of the larvae.


1998 ◽  
Vol 130 (5) ◽  
pp. 733-734 ◽  
Author(s):  
Claude Godin ◽  
Guy Boivin

During a study on the parasitoids of the imported cabbageworm, Artogeia rapae (L.) (Lepidoptera: Pieridae), undertaken in 1993 and 1994, we recovered Cotesia rubecula (Marshall) (Hymenoptera: Braconidae) for the first time in Quebec, Canada. Samples were taken from pesticide-free plots of cabbage, broccoli, and Brussels sprouts located at Ste-Clotilde (45°09′N, 73°41′W) and L'Acadie, Quebec (45°18′N, 73°21′W), as described by Godin and Boivin (1998). In addition, survival of diapausing C. rubecula was evaluated after a 5-month incubation at 4°C (Godin 1997). Both A. rapae and C. rubecula are introduced species and originate most likely from Europe (Richards 1940). Artogeia rapae was discovered in 1860 in Quebec (Harcourt 1963), and C. rubecula was first reported in 1963 in British Columbia (Wilkinson 1966).


Author(s):  
P.J. Cameron ◽  
G.P. Walker ◽  
M.A. Keller
Keyword(s):  

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