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Regional Assemblages Of Lygus (Heteroptera: Miridae) In Montana Canola Fields, Andrew W. Lenssen, R. A. Ritter, Sue L. Blodgett, M. L. Taper
Regional Assemblages Of Lygus (Heteroptera: Miridae) In Montana Canola Fields, Andrew W. Lenssen, R. A. Ritter, Sue L. Blodgett, M. L. Taper
Andrew W. Lenssen
Sweep net sampling of canola (Brassica napus L.) was conducted in 2002 and 2003 to determine Lygus (Heteroptera: Miridae) species composition and parasitism levels in four regions of Montana. Regardless of region or seasonal change, Lygus elisus (Van Duzee) was the dominant species in all canola fields sampled, averaging 60–99% of the total adult populations. Lygus borealis (Kelton), Lygus keltoni (Schwartz) and Lygus lineolaris (Palisot) were detected at much lower levels. Total lygus population density was greatest in the southwest and central regions. The northeast and southwest regions had the greatest lygus species diversity. The proportion of L. elisus increased …