Contents 



Need to standardize pest-resistance evaluation 1 



Characterizing disease resistance 1 



Background 1 



Summary of resistance information by 



disease 2 



Characterizing insect resistance 7 



Background 7 



Summary of resistance information by insect 



species 8 



Characterizing nematode resistance 11 



Background 11 



Summary of resistance information by nematode 



species 11 



Resource scientists 12 



Availability of check cultivars 13 



Distribution and severity maps 14 



Established cultivar evaluation procedures 20 



Bacterial wilt resistance 20 



Anthracnose resistance 21 



Common leaf spot resistance 21 



Lepto leaf spot resistance 22 



Downy mildew resistance 23 



Fusarium wilt resistance 24 



Phytophthora root rot resistance 25 



Verticillium wilt resistance 26 



Rust resistance 26 



Yellow leaf blotch resistance 27 



Alfalfa seed chalcid resistance 27 



Alfalfa weevil-feeding resistance 28 



Pea aphid resistance 28 



Blue alfalfa aphid resistance 29 



Spotted alfalfa aphid resistance 29 



Potato leafhopper yellowing resistance 29 



Root-knot nematode resistance 30 



Stem nematode resistance 30 



Future developments 32 



Literature cited 33 



Appendix 37 



