Soybean aphid suppression and natural enemy movement in agricultural landscapes in Manitoba

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dc.contributor.authorSamaranayake, Kandanpita Galaddalage Lahiru Ishan
dc.contributor.examiningcommitteeHolliday, Neil J. (Entomology) Mason, Peter G. (Agriculture and Agri-Food Canada) Walker, David (Environment and Geography)en_US
dc.contributor.supervisorCostamagna, Alejandro C. (Entomology)en_US
dc.date.accessioned2017-08-29T15:16:43Z
dc.date.available2017-08-29T15:16:43Z
dc.date.issued2017
dc.degree.disciplineEntomologyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractLandscape complexity and arthropod predators have been shown to play a major role in suppression of the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae) in North America. I examined the impact of landscape complexity and patterns of predator movement between habitats on sentinel soybean aphid populations in 27 soybean fields in Manitoba over a two-year period. Predator movement was quantified using bi-directional Malaise traps and mark-release-recapture experiments. My results revealed that there was a strong to moderate suppression of soybean aphids across the gradient of landscape complexity studied. I found that predator movement between soybean and adjacent habitats was as important as landscape characteristics in explaining aphid suppression. My results indicate that the direction of predator movement in soybean field borders is influenced by the type of adjacent habitat and by predator identity. My findings highlight the importance of pest control services provided by aphidophagous predators in agricultural landscapes.en_US
dc.description.noteOctober 2017en_US
dc.identifier.urihttp://hdl.handle.net/1993/32384
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectLandscape complexityen_US
dc.subjectInsect predatorsen_US
dc.subjectPredator movementen_US
dc.subjectAphid suppressionen_US
dc.subjectAphis glycinesen_US
dc.subjectGlycine maxen_US
dc.subjectSyrphidaeen_US
dc.subjectAnthocoridaeen_US
dc.subjectChrysopidaeen_US
dc.subjectNabidaeen_US
dc.subjectCoccinellidaeen_US
dc.subjectHemerobiidaeen_US
dc.subjectCoccinella septempunctataen_US
dc.subjectToxomerus marginatusen_US
dc.titleSoybean aphid suppression and natural enemy movement in agricultural landscapes in Manitobaen_US
dc.typemaster thesisen_US
local.subject.manitobayesen_US
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