Hooked Trichomes: A Physical Plant Barrier to a Major Agricultural Pest

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Science  06 Aug 1976:
Vol. 193, Issue 4252, pp. 482-484
DOI: 10.1126/science.193.4252.482


Hooked epidermal appendages (trichomes) on leaves of field bean cultivars effectively capture nymph and adult leafhoppers. Frequency of capture and capture mortality are highly correlated with trichome density. Hooked trichomes inserted at angles less than 30° are ineffective in capture.