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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 …
Incorporating Targeted Grazing Into Farming Systems, Andrew W. Lenssen, Patrick Hatfield, Hayes Goosey, Sue Blodgett
Incorporating Targeted Grazing Into Farming Systems, Andrew W. Lenssen, Patrick Hatfield, Hayes Goosey, Sue Blodgett
Andrew W. Lenssen
When incorporating targeted grazing into farming systems, livestock producers and farm operators need assurance that the benefits from their activities are worth their investments. This chapter will focus on how integrating grazing, particularly with sheep and goats, into farming systems can offer those benefits. The concepts are not new. Cropping systems were once integrated with livestock production: Livestock gained forage value from crop aftermath, crops were grown to sustain livestock, and livestock were used as implements to produce crops. Today, few cropping systems include livestock. Sheep and goats are traditionally produced on rangelands or pasture forages and supplemented during winter …
Depression Of Forage Quality Of Alfalfa Leaves And Stems By Acyrthosiphon Kondoi (Homoptera: Aphididae), Andrew W. Lenssen, Edgar L. Sorensen, Gerry L. Posler, Sue L. Blodgett
Depression Of Forage Quality Of Alfalfa Leaves And Stems By Acyrthosiphon Kondoi (Homoptera: Aphididae), Andrew W. Lenssen, Edgar L. Sorensen, Gerry L. Posler, Sue L. Blodgett
Andrew W. Lenssen
ACYTthosiphon kondoi Shinji is a major pest of alfalfa (Medicago sativa L.). Susceptible seedling plants are killed by A. kondoi, and established plants suffer yield loss by stunting. Information is meager on the influence of A. kondoi infestation or host plant resistance on forage quality of alfalfa leaves and stems. In a controlled environment, the forage quality (includingphenolic monomers)of alfalfagermplasmsKSI53P4and KS153BA3P4 (susceptible and resistant to A. kondoi, respectively) with and without A. kondoi infestation was compared. Leaves infested with A. kondoi had lower concentrations of crude protein and true in vitro digestible dry matter (TIVDDM) than uninfested leaves of controls, …
In Vitro Dry Matter Disappearance, Crude Protein Concentration, And Leaf Percentage Of Erect Glandular-Haired Medicago Populations, Andrew W. Lenssen, E. L. Sorensen, G. L. Posler, L. H. Harbers
In Vitro Dry Matter Disappearance, Crude Protein Concentration, And Leaf Percentage Of Erect Glandular-Haired Medicago Populations, Andrew W. Lenssen, E. L. Sorensen, G. L. Posler, L. H. Harbers
Andrew W. Lenssen
Available resistance in alfalfa (Medicago sativa L.) cultivars is currently inadequate to control the alfalfa weevil, Hypera postica (Gyllenha), or potato Ieafhopper, ErnpoascaJabae (Harris), the two most injurious arthropod pests of alfalfa in North America. Resistance to both insects has been documented in other Medicago species having erect, glandular hairs. These hairs have been transferred to alfalfa. A field trial in 1985 was to determine the effects of erect, glandular hairs and their exudates on forage quality of several perennial Medicagos. Glandular and eglandular plant populations were selected from each of the diploids, M. prostrata Jacq. and M. glandulosa David., …