Assertion: cowpea | /r/HasProperty | ehlers et al.
Facets:
Source sentences:
text: Although host plant resistance is considered the most effective strategy for RKN management on cowpea (Ehlers et al., 2002), the dynamic nature of RKN populations and the emergence of virulent pathotypes (Roberts et al., 1997; Petrillo et al., 2006) suggest that additional novel sources of resistance to these pathogens are needed (Fery et al., 1994; Roberts et al., 1996; Ehlers et al., 2000a, 2002).