The leafminer, Liriomyza trifolii (Burgess), was attracted more to short day (SD) grown chrysanthemums for feeding and oviposition than to long day (LD) grown chrysanthemums. Densities of feeding punctures and mines within SD grown plants were positively related to leaf height. A physical property of chrysanthemum leaves influencing the preference of feeding and oviposition sites by the female leafminer was trichome density.
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Knodel-Montz et al. (1985) studied this question.