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並前往https://allianceforscience.cornell.edu/blog/2019/12/nigeria-clears-bt-cowpea-for-farmers-use/

Nigeria clears Bt cowpea for farmers' use - Alliance for Science

But cowpea farmers can lose up to 90 percent of their crop to the pod borer (Maruca vitrata) pest and typically apply pesticides six or seven ...

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