Abstract
IT is considered that one of the theoretical advantages of systemic materials applied to roots or stems is the selective action against phytophagous pests without toxicity to their predators. This ecological selectivity was demonstrated by Ripper1, who found that bean plants dipped in a solution of dimefox were toxic to both aphids and predators, but when dimefox was applied as a root drench, aphids were killed and predators survived.
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Ripper, W. E., Geenslade, R. M., and Hartley, G. S., J. Econ. Entomol., 44, 448 (1951).
Smith, F. F., Henneberry, T. J., and Boswell, A. L., J. Econ. Entomol., 56, 274 (1963).
Herne, D. C., and Chant, D. A., Canad. Entomol., 97, 172 (1965).
McClanahan, R. J., Proc. Entomol. Soc. Ont., 97 (in the press).
Hunt, E. G., in Scientific Aspects of Pest Control, 251 (Nat. Acad. Sci. Publ. 1402, Washington, D.C., 1966).
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MCCLANAHAN, R. Food-chain Toxicity of Systemic Acaricides to Predaceous Mites. Nature 215, 1001 (1967). https://doi.org/10.1038/2151001a0
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DOI: https://doi.org/10.1038/2151001a0
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