Michigan State University Extension
Michigan Soybean Information - 00000070
11/16/00
Triazine
List of files and visuals associated with this text.
(e.g.atrazine, Bladex, metribuzin)
Triazine injury symptoms are usually seen on the oldest
leaves first, with initial injury developing at the
leaflet tips. The leaves will turn yellow, and eventually
the tissue may turn brown and die. Some defoliation may
occur, but as long as the terminal bud is alive, the
soybean may recover. The action and weed spectrum of
metribuzin (Vis. 1) is similar to that of the S-triazines
(Atrazine (Vis. 2), simazine). However, its crop tolerance
and fate in soils is much different. Research data
indicates that early metribuzin injury is generally
cosmetic and will not affect final yield. Several soybean
varieties are sensitive to metribuzin; refer to herbicide
label for a list of these varieties. Shallow planting,
environmental conditions, soil pH, soil type and soil
organic matter will affect the relative severity of
triazine injury. Note: The herbicide linuron may cause
symptoms very similar to triazine injury.
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a commercial product or company.
This file was generated from data base S1 on 11/16/00.
Data base S1 was last revised on 11/16/00.
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reinholt@michigansoybean.org . Please read our
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