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Can. Ent. 108: 635-648 (1976) Population models for the Egyptian alfalfa weevil and alfalfa are reported, which compared favorably with field data. A mechanism for coupling the plant-herbivore trophic levels is suggested.

The spatial distribution of the Egyptian alfalfa weevil larvae using Iwao’s index of dispersion was examined in a California alfalfa field. The changing dispersion patterns with time were found to be influenced by both density induced competition for food and varying spatial distribution of host plants. values characteristic for both years quickly stabilized. This made possible a method for estimating leaf consumption rates by larval populations with an aggregated distribution, k being derived from . Field sampling decision rules were also determined.

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