TY - JOUR
T1 - Effect of seed treatment on early season brown spot caused by Septoria glycines of soybean
AU - Batzer, Jean C.
AU - Kandel, Yuba R.
AU - Bradley, Carl A.
AU - Chilvers, Martin I.
AU - Tenuta, Albert U.
AU - Wise, Kiersten A.
AU - Hernández, Edward
AU - Mueller, Daren S.
N1 - Publisher Copyright:
© 2018.
PY - 2016
Y1 - 2016
N2 - Early season brown spot caused by Septoria glycines was compared in Illinois, Indiana, Iowa, Michigan, and Ontario, Canada, soybean fields planted with differing commercial seed treatments. Seed treatments that included fluopyram significantly reduced brown spot (P < 0.001). A greenhouse mist chamber experiment revealed that fluopyram seed treatment reduced the Area Under Disease Progress Curve of brown spot over a 6-week period (P < 0.001). Brown spot severity was unaffected by plant age at inoculation for the control treatment without fluopyram (P = 0.911); however, severity increased with plant age at inoculation for the fluopyram treatment (P = 0.009). The sensitivity of two S. glycines isolates to fluopyram was assessed by determining the effective concentration required to reduce its colony diameter growth in culture by 50% (EC50). Both isolates had an EC50 of 0.41 μg/ml of fluopyram. These results demonstrate that fluopyram seed treatment is effecttive at controlling early season brown spot in soybean.
AB - Early season brown spot caused by Septoria glycines was compared in Illinois, Indiana, Iowa, Michigan, and Ontario, Canada, soybean fields planted with differing commercial seed treatments. Seed treatments that included fluopyram significantly reduced brown spot (P < 0.001). A greenhouse mist chamber experiment revealed that fluopyram seed treatment reduced the Area Under Disease Progress Curve of brown spot over a 6-week period (P < 0.001). Brown spot severity was unaffected by plant age at inoculation for the control treatment without fluopyram (P = 0.911); however, severity increased with plant age at inoculation for the fluopyram treatment (P = 0.009). The sensitivity of two S. glycines isolates to fluopyram was assessed by determining the effective concentration required to reduce its colony diameter growth in culture by 50% (EC50). Both isolates had an EC50 of 0.41 μg/ml of fluopyram. These results demonstrate that fluopyram seed treatment is effecttive at controlling early season brown spot in soybean.
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U2 - 10.1094/PHP-RS-16-0035
DO - 10.1094/PHP-RS-16-0035
M3 - Article
AN - SCOPUS:85018471532
SN - 1535-1025
VL - 17
SP - 223
EP - 228
JO - Plant Health Progress
JF - Plant Health Progress
IS - 4
ER -