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The Nitrogen Content of Different Varieties of Peas as a Factor Affecting Infestations by Macrosiphum pisi (Kltb.) (Homoptera: Aphididae). A Preliminary Report1

  • J. B. Maltais (a1)

Extract

The influence of varietal differences in plants on infestation by aphids has received considerable attention in control studies. Painter (14), in 1941, concluded that the composition of the available food in the host plant plays possibly the most important role in determining the relative resistance to aphid attacks. In biological studies on Aphis rumicis L., Davidson (8) found that factors that influence the physiological activity of the plant affect also the progress of aphid infestation. The same author (6) also pointed out that aphids exhibit a wide range of fecundity on different hosts. “The sap of certain varieties of beans”, writes Davidson, “appears to have a direct inhibiting effect upon the reproductive capacity of the aphids, whereas that of other varieties seems to have the opposite effect.”

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2. Anonymous. The Hengar technique for the Kjeldahl procedure. Hengar Company, Philadelphia, Pa. [Trade pamphlet]
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12.Maltais, J. B.Resistance of some varieties of peas to the pea aphid, Illinoia pisi Kalt. 67th Ann. Rept. Ent. Soc. Ontario, 1936, pp. 4045. 1937.
13.Maltais, J. B.New developments in breeding of peas for resistance to the pea aphid. 80th Ann. Rept. Ent. Soc. Ontario, 1949, pp. 2930. 1950.
14.Painter, R. H.The economic value and the biologic significance of insect resistance in plants. J. Econ. Ent. 34: 358–67. 1941.
15.Schaefer, C. W.Physiological conditions which produce wing development in the pea aphid, J. Agr. Research 57: 825–41. 1938.
16. Van Slyke, D. D.The quantitative determination of aliphatic amino nitrogen in minute quantities, J. Biol. Chem. 16: 121. 19131914.
17.Wigglesworth, V. B.The principles of insect physiology. 2nd ed.Methuen & Company Ltd., London. 1942.

The Nitrogen Content of Different Varieties of Peas as a Factor Affecting Infestations by Macrosiphum pisi (Kltb.) (Homoptera: Aphididae). A Preliminary Report1

  • J. B. Maltais (a1)

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