加拿大西部甘蓝种子荚象鼻虫.pdf

1、Cabbage Seedpod WeevilDr James A.TanseyProvincial Insect and Vertebrate SpecialistSaskatchewan Ministry of Agriculture Ceutorhynchus obstrictus(Marsham)Coleoptera:Curculionidae Native to western Palearctic Feeds exclusively on BrassicaceaePhoto:Lloyd DosdallPhoto:Lloyd DosdallCabbage Seedpod Weevil

2、Invasive in N America Known as the turnip seed weevil or seed weevil in Europe Recognized as a pest from the Mediterranean to Scandinavia since the beginning of the 19th century In North America,first recorded near Vancouver in 1931 Western N American populations from Western Europe CSWPhoto:Time Ha

3、ye,CABI Invasive in N America Now well established in Okanagan and Creston valleys By 1946 it had spread to US PNW and California Southern Alberta 1995,Saskatchewan 2000,Manitoba 2017 Quebec 2000(separate introduction from Russia,Scandinavia)Established in Georgia and Tennessee,USACSWPhoto:Time Haye

4、,CABIFlight Average 55 km/year Stowaways in vehicles HWY 1 in ABPhoto:Adam BlakeBulletin of the entomological society of Canada,Vol 51,2019CSW FlightTansey,J.A.,Dosdall,L.M.,Keddie,A.,&Olfert,O.(2010).Environmental entomology,39(4),1092-1100.CSW Life History Host range:Brassicaceae Food hosts Adult

5、feeding Wild mustard,hoary cress,field pennycress,flixweed,shepherds purse,radish,and volunteer canola True hosts Larval development Canola,brown mustard Larvae are major economic issueCSW hostsPhoto:Dan JohnsonPhoto:Jon WilliamsPhoto:Meghan Vankosky,AAFCPhotos:Colleen Fennig,SARM PHTA Secondary(?)i

6、nfestation by canola flower midgePhoto:Colleen Fennig,SARM PHTACSW control Cultural control Chemical control Biological control Resistant germplasmPhoto:The Western ProducerCultural control:Seeding date affects abundance of weevils and lygus01020304050601_April2_early-May3_late-MayAverage number of