TY - JOUR
T1 - Crop bromide concentrations following methyl bromide fumigation for pale cyst nematode in southeastern Idaho
AU - Rogers, Christopher W.
AU - Marshall, Juliet M.
AU - Moll, Margaret
AU - Curl, Cynthia
N1 - Publisher Copyright:
© 2023 The Authors. Journal of Environmental Quality published by Wiley Periodicals LLC on behalf of American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.
PY - 2024/1/1
Y1 - 2024/1/1
N2 - Methyl bromide (MeBr) is a sterilizing fumigant used to control quarantine pests that is restricted due to its detrimental atmospheric effects. The degradation of injected MeBr produces crop-available Br−. Up to five applications of MeBr were used in southeastern Idaho fields to combat the pale cyst nematode (Globodera pallida). Data regarding the uptake and partitioning of Br− in crops following MeBr application in the region were unavailable. Research determined background concentrations of Br− in alfalfa (Medicago sativa L.), barley (Hordeum vulgare L.), corn (Zea mays L.), potato (Solanum tuberosum L.), and wheat (Triticum aestivum L.) compared to MeBr-treated fields. Background Br− concentrations ranged from nondetectable (ND) to 33.0 mg Br− kg−1; vegetative tissue concentrations were greater than reproductive, except corn where there was no difference. Nearly all crops grown in MeBr-treated fields had greater Br− concentrations than background. Background-baled-alfalfa tissue Br− concentration was 33.0 mg kg−1 compared to 117.8 mg Br− kg−1 from a MeBr-treated field. Br− concentration in green alfalfa decreased from 79.8 to 36.5 mg Br− kg−1 at the final cutting in a MeBr-treated field, where time after application decreased crop Br− concentrations. Small grains had low Br− concentrations in reproductive tissue (1.7 mg Br− kg−1) compared to vegetative tissue (106.5 mg Br− kg−1). Corn stover concentration (12.7 mg Br− kg−1) was low relative to small-grain straw, but corn ear (5.8 mg Br− kg−1) was greater than small-grain reproductive tissue in the MeBr-treated field. Crop selection following MeBr applications should consider the likelihood of elevated Br− concentration for the plant fractions intended end use.
AB - Methyl bromide (MeBr) is a sterilizing fumigant used to control quarantine pests that is restricted due to its detrimental atmospheric effects. The degradation of injected MeBr produces crop-available Br−. Up to five applications of MeBr were used in southeastern Idaho fields to combat the pale cyst nematode (Globodera pallida). Data regarding the uptake and partitioning of Br− in crops following MeBr application in the region were unavailable. Research determined background concentrations of Br− in alfalfa (Medicago sativa L.), barley (Hordeum vulgare L.), corn (Zea mays L.), potato (Solanum tuberosum L.), and wheat (Triticum aestivum L.) compared to MeBr-treated fields. Background Br− concentrations ranged from nondetectable (ND) to 33.0 mg Br− kg−1; vegetative tissue concentrations were greater than reproductive, except corn where there was no difference. Nearly all crops grown in MeBr-treated fields had greater Br− concentrations than background. Background-baled-alfalfa tissue Br− concentration was 33.0 mg kg−1 compared to 117.8 mg Br− kg−1 from a MeBr-treated field. Br− concentration in green alfalfa decreased from 79.8 to 36.5 mg Br− kg−1 at the final cutting in a MeBr-treated field, where time after application decreased crop Br− concentrations. Small grains had low Br− concentrations in reproductive tissue (1.7 mg Br− kg−1) compared to vegetative tissue (106.5 mg Br− kg−1). Corn stover concentration (12.7 mg Br− kg−1) was low relative to small-grain straw, but corn ear (5.8 mg Br− kg−1) was greater than small-grain reproductive tissue in the MeBr-treated field. Crop selection following MeBr applications should consider the likelihood of elevated Br− concentration for the plant fractions intended end use.
UR - http://www.scopus.com/inward/record.url?scp=85177579196&partnerID=8YFLogxK
U2 - 10.1002/jeq2.20529
DO - 10.1002/jeq2.20529
M3 - Article
C2 - 37939688
AN - SCOPUS:85177579196
SN - 0047-2425
VL - 53
SP - 47
EP - 56
JO - Journal of Environmental Quality
JF - Journal of Environmental Quality
IS - 1
ER -