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VI. AQUATIC PLANTS: Yes No BMPs <br /> Structures: <br /> 85). Are ditches maintained to prevent aquatic plants from clogging 0 71 E1-3 <br /> discharge structures? <br /> 86). Are measures taken to prevent floating vegetation from clogging 7 :1 E1 <br /> culvert riser structures? <br /> 87). Are physical deterrents such as ribbon barriers, traps, or baffle boxes :1 El <br /> used to limit the movement of aquatic weeds and debris from canals <br /> and ditches to off-site waterways? <br /> 88). Are fish barriers used to contain grass carp within targeted ditches? 0 Li E2 <br /> Strategies: <br /> 89). Are mechanical harvesters used to remove aquatic weeds from 0 ❑ E1 <br /> ditches or canals? <br /> 90). Are biological control agents such as flea beetles, hyacinth weevils, 0 0 E2 <br /> or grass carp used to manage aquatic weeds? <br /> 91). When selecting aquatic herbicides for target species is mode of 0 0 E3 <br /> action, residual toxicity, and potential for offsite movement considered? <br /> 92). Are appropriate measures taken to control drift and place the desired 0 E3 <br /> chemical on the weed to be eliminated whether it is submersed, <br /> emergent or floating? <br /> 9 <br />