Abstract
To be useful in the context of modeling for integrated pest management, observations on percent defoliation by a tissue-consuming pest should be translated into the amounts of tissue consumed between successive observations. Such translation is complicated by natural canopy growth and senescence between observations. We present a procedure to estimate the loss of leaf tissue from the estimates of defoliation. The resultant equations have been incorporated into two potato growth models. The equations are also applicable to the modelling of tissue consumed by pests in other species, provided that appropriate crop growth models exist.
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