Efficacy of Piper nigrum (Piperaceae) extract for control of insect defoliators of forest and ornamental trees von Scott, I. M., Helson, B. V., Strunz, G. M., Finlay, H., Sánchez-Vindas, P. E., Poveda, L., Lyons, D. B., Philogène, B. J. R., Arnason, J. T.

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Effects of azadirachtin-based insecticides on the egg parasitoid Trichogramma minutum (Hymenoptera: Trichogrammatidae) von Lyons, D.B., Helson, B.V., Bourchier, R.S., Jones, G.C., McFarlane, J.W.

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Laboratory toxicology of six forestry insecticides to four species of bee (Hymenoptera: Apoidea) von HELSON, B. V, BARBER, K. N, KINGSBURY, P. D

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Recommendations for control of cone and seed insect pests of black spruce, Picea mariana (Mill.) B.S.P., with insecticides von Wanner, K.W, Kostyk, B.C, Helson, B.V

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Distribution and persistence of aerially sprayed permethrin in some terrestrial components of a boreal plantation forest von Sundaram, Kanth M. S, Helson, Blair V, Payne, Nicholas J

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Efficacy and timing of insecticide sprays for control of white pine weevil (Coleoptera: Curculionide) in high-value pine plantations von De Groot, P, Helson, B.V

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Number of generations, egg production, and developmental time of Culex pipiens and Culex restuans (Diptera: culicidae) in southern Ontario [Canada] von Madder, D J, Surgeoner, G A, Helson, B V

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Number of Generations, Egg Production, and Developmental Time of Culex Pipiens and Culex Restuans (Diptera: Culicidae) in Southern Ontario1 von Madder, D.J., Surgeoner, G.A., Helson, B.V.

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The use of bioassays to assess aquatic arthropod mortality from permethrin drift deposits von Helson, B.V., Kingsbury, P.D., De Groot, P.

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Diel biting activity of Mansonia perturbans (Diptera : Culicidae) in southwestern Ontario von Allan, S.A, Surgeoner, G.A, Helson, B.V

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Susceptibility of Culex spp. and Aedes spp. larvae (Diptera: Culicidae) to temephos and chlorpyrifos in southern Ontario von Helson, B.V, Surgeoner, G.A, Ralley, W.E

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