Pollinator Mortality Due to Pesticide-Laden Particulate
Matter from Beef Cattle Feedyards
Posted on 2023-09-19 - 03:04
Wild and managed bees are critical for the stability of trophic webs, angiosperm reproduction, and agricultural productivity. Unfortunately, as many as 40% of crop pollinators are in a steep decline due to habitat loss and exposure to agrochemicals. Pyrethroids, neonicotinoids, and macrocyclic lactones are among the many agrochemicals toxic to pollinating insects that are used extensively in industrial beef cattle feeding operations throughout the world. Fugitive feedyard particulate matter (PM) transports agrochemicals into the surrounding environs. To determine the impact of agrochemical-laden feedyard particulate matter on bee pollinators, we conducted in situ experiments wherein honeybees and mason bees were placed downwind and upwind of feedyards (N = 40). Concurrent, colocated total suspended particulate matter samples contained multiple insecticides and parasiticides including pyrethroids, neonicotinoids, and macrocyclic lactones, in significantly higher concentrations downwind of feedyards (bifenthrin, 8.45 ± 4.92; permethrin, 1032.34 ± 740.76; clothianidin, 3.61 ± 1.48; imidacloprid, 73.32 ± 47.52; thiamethoxam, 5.81 ± 3.16; abamectin, 0.45 ± 0.29; ivermectin, 8.88 ± 5.06 ng/g). Honeybees and mason bees sited downwind of feedyards always experienced higher mortality than those correspondingly sited upwind, and male mason bees experienced significantly higher mortality compared to females when both were sited downwind. Bees occurring downwind of beef cattle feedyards for 1 h are 232–260% more likely to die than those occurring upwind. Thus, agrochemicals used on and emitted from beef cattle feedyards are significant threats to bee pollinators.
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Green, Frank B; Peterson, Eric M; Emert, Amanda D; Subbiah, Seenivasan; Smith, Philip N (1753). Bee Pollinator Mortality Due to Pesticide-Laden Particulate Matter from Beef Cattle Feedyards. ACS Publications. Collection. https://doi.org/10.1021/acs.est.3c03135
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Frank B Green
Eric M Peterson
Amanda D Emert
Philip N Smith
steep decline dueladen particulate matter45 ± 434 ± 74032 ± 47232 – 26061 ± 1parasiticides including pyrethroidsexperiments wherein honeybeesbeef cattle feedyards88 ± 581 ± 345 ± 0correspondingly sited upwindbees occurring downwindmany agrochemicals toxicsited downwindoccurring upwind1 hplaced downwindmason beesmanaged beesused extensivelytrophic webstransports agrochemicalssurrounding environssitu significant threatspollinating insectsmacrocyclic lactoneshabitat lossg ).crop pollinatorsbee pollinatorsangiosperm reproductionagrochemicals usedagricultural productivity06 ng