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12 Cards in this Set
- Front
- Back
what is structure of paraquat and diquat?
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p.227
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what are resonance stabilized free radical form of paraquat?
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p.227
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how are bipyridilium herbicides used?
and mech of action? |
mech: form stable free radicals, generate ROS, damage plant tissue, plant appear frost bitten from cell membrane destruction, reduce photosynthesis
applied to foliage of weeds as general contact herbicide |
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mech of action of protox inhibitors(diphenyl ethers and related herbicides)?
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p.228
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how do thoilcarbamate herbicides act?
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mainly used to protect corn by working with atrazine, inhibit shoot growth of germinating seeds, kill grass weeds and broadleaf
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why must thiolcarbamate be incorporated into soil?
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they are volatile compounds
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major thiolcarbamate herbicides for corn in US?
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EPTC, butylate use with safener or extender
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how are EPTC and butylate metabolized? what is critical intermediate in mode of action of butylate?
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sulfoxidation activate for reaction with GSH, sulfoxide metabolism critical intermediate for mode of action
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what is an example of a safener used with butylate or EPTC?
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dichlormid (elevate GSH and GSH transferase activity)
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how do extenders affect thiocarbamate herbicide? give an example of an extender
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example- dietholate
slow breakdown in problem soils |
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what does acetyl coa carboxylase do?
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first step in fatty acid biosynthesis
acetyl COA to malonyl COA |
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inhibitors of acetyl coa carboxylase?
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free carboxylic acid, CoA ester, phenoxyphenoxyproprionic acid (PPP), cyclohexanediones
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