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Evaluating the interaction between buckwheat Fagopyrum esculentum (Polygonaceae) and wireworm (Coleoptera:Elateridae) species

Scott, I.M., Y. Bohorquez Ruiz, J. McNeil (2016) Evaluating the interaction between buckwheat Fagopyrum esculentum (Polygonaceae) and wireworm (Coleoptera:Elateridae) species. Entomological Society of Ontario Annual General Meeting Great Lakes Forestry Centre Sault Ste. Marie 2016/10/14 - 2016/10/16

Abstract

Click beetle larvae or wireworms are considered pests due to the damage caused by feeding on the root systems of agricultural crops. Field studies in Atlantic Canada using buckwheat in rotation with potato resulted in a reduction of Agriotes spp. wireworm populations. Microplot trials with buckwheat and an Ontario species, Limonius agonus (Say), demonstrated a negative effect on larvae during a 3 week interaction. Laboratory soil olfactometer experiments found no evidence that Agriotes sputator L. were deterred by buckwheat at germinating, branching and flowering stages relative to red spring wheat (Triticum spp) and island barley (Hordeum vulgare). In the greenhouse, a 3 week, no choice feeding assay determined no difference in weight and mortality of A. sputator larvae when fed buckwheat or barley. However, in contrast to barley, the wireworm herbivory did not affect buckwheat growth, suggesting that buckwheat roots may produce anti-feedants.

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