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Differential Response of Soybean Cultivars to Metribuzin 1
Author(s) -
Wax L. M.,
Stoller E. W.,
Bernard R. L.
Publication year - 1976
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1976.00021962006800030011x
Subject(s) - metribuzin , cultivar , glycine , agronomy , biology , weed control , horticulture , biochemistry , amino acid
Metribuzin [4‐amino‐6‐ tert ‐butyl‐3‐(methylthio)‐ as ‐triazin‐5(4H)one] controls several species of troublesome annual broadleaf weeds in soybeans [ Glycine max (L.) Merr.] but it sometimes causes excessive crop injury. To determine the extent to which this injury is caused by differential sensitivity of cultivars to metribuzin, we evaluated the response of approximately 250 soybean cultivars to soil‐incorporated metribuzin in field experiments in 1973 and 1974. Most cultivars were relatively tolerant of metribuzin at 0.56 kg/ha. At 0.84 and 1.7 kg/ha, many entries were severely injured or killed. Some of the most sensitive cultivars were ‘Altona,’ ‘Hurrelbrink,’ ‘Norman,’ ‘Portage,’ ‘Semmes,’ ‘Tracy,’ and ‘Vansoy.’ These cultivars, and possibly others with only moderate resistance to metribuzin, should probably be avoided when metribuzin is to be used for weed control.