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A quantitative method for defining the feeding preferences of a mandibulate, phytophagous insect is described. Plant material is offered to the insects in a petri dish uneaten portions of the disc to a selenium photocell. This transmitted light is a linear function of the area intercepted by the disc. The method allows direct utilization arena in the form of 9-mm-diameter discs punched from of photometer readings in judging feeding preference freshly excised leaves. The palatability of each leaf disc is measured by the amount of light transmitted past the without further transformation.
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Kogan et al. (1969) studied this question.
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