Megalurothrips usitatus,a tiny and discreet pest,is a major threat to cowpea(Vigna unguiculata).It is the primary target of excessive chemical pesticide use among local cowpea growers.To accurately select safe,effective,and promising biocontrol agents,we investigated th...MORE Megalurothrips usitatus,a tiny and discreet pest,is a major threat to cowpea(Vigna unguiculata).It is the primary target of excessive chemical pesticide use among local cowpea growers.To accurately select safe,effective,and promising biocontrol agents,we investigated the ...