. Agri-news. Agriculture. Canola productivity and lygus bugs From 1996 to 1998, Alberta experienced an unprecedented lygus bug outbreak. Well over a million acres of canola were sprayed to control lygus. A research team, formed to investigate canola's ability to compensate for herbivore damage, has found crucial information for the management of lygus bugs. In recent studies completed under the Alberta Agricultural Research Institute's Farming for the Future Matching Grants Program, entomologists and agronomists determined that insecticidal control of lygus bugs during early growth stages of c
. Agri-news. Agriculture. Canola productivity and lygus bugs From 1996 to 1998, Alberta experienced an unprecedented lygus bug outbreak. Well over a million acres of canola were sprayed to control lygus. A research team, formed to investigate canola's ability to compensate for herbivore damage, has found crucial information for the management of lygus bugs. In recent studies completed under the Alberta Agricultural Research Institute's Farming for the Future Matching Grants Program, entomologists and agronomists determined that insecticidal control of lygus bugs during early growth stages of canola is not a prudent strategy. "In experiments at Beaverlodge, Lethbridge and Ellerslie, conducted in conjunction with our colleagues at Agriculture and Agri-Food Canada, we found that canola plants infested with lygus bugs were more productive,"' says Jim Jones, entomologist now with the Western Pest Management Company Ltd. of Sherwood Park, and the project's principal researcher. "Even under the drought conditions at Lethbridge and Ellerslie during 2000 and 2001, canola compensated for bud loss. We found that lygus bug feeding during the bud through flowering stages in canola did not result in significant yield losses and so we do not advise insecticide treatment for control of lygus in canola during bud and early flowering stages, particularly. In our experiments, lygus did not pose a threat to canola ; This research studied plant architecture, seed yield and other vegetative and reproductive attributes potentially involved in compensation. The density and duration of lygus bug infestation during the-bud through bloom period were manipulated in separate experiments conducted by three research teams working at different sites. At bud stage, plants were individually caged and density treatments or duration treatments were applied. At harvest, plants from these experiments were retrieved for measures of stature and feeding damage. Yields were measur
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