Eupatorium Adenophorum Spreng is one kind of harmful plant, which
seriously does harm to grassland in China. If cattle eat it, they will be poi-
soned or feel sick , So it is bad for animal husbandry. In former research
works , we discovered that it conclud the active substance killing Aphids but
havc no harm to crop. in order to use this kind of poisonous plant as well
as prevention and weeding it, we studied the...
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