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(a) Silver linden (T. tomentosa ‘Petiolaris’) at the Royal Botanic Gardens, Kew, UK; (b) chemicals implied in bee deaths; (c) buff-tailed bumblebee (B. terrestris) worker foraging on T. tomentosa; (d) dead bees (B. terrestris, B. hypnorum, B. lucorum, Apis mellifera) collected during 1 day (29 July 2016) under flowering T. tomentosa.
