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ABDULKADIR A. I.; HAYATU M.; SANI, L. A.; AHMED H. BIOCONTROL ABILITY OF Trichoderma Harzianum ON GROWTH, DISEASE INCIDENCE AND YIELD OF SELECTED COWPEA VARIETIES (Vigna Unguiculata L.) INFESTED WITH Colletotrichum Lindemuthianum. BIMA 2022, 6, 65-76.