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Important quality of bioagents a). Attack only host plant b). Free from predators/parasites and quick adoption to new environment c). Able to kill reproductive parts of weed d). All of these

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Important quality of bioagents  
a). Attack only host plant
b). Free from predators/parasites and quick  adoption to new environment
c). Able to kill reproductive parts of weed
d). All of these
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d). All of these
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