Summary of Resistance Information by Insect Species 



Distribution and severity maps for eight of the most widely 

 spread insect species in the United States appear on 

 pages 14 to 19. Scientists who can serve as resource people 



for problems concerned with developing host-plant resist- 

 ance are identified. Also, check cultivars have been iden- 

 tified where sufficient information is available 2 and the avail- 

 ability and type of screening and evaluation procedures 

 (L = laboratory, F = field tests) are indicated. 



Tabulation summarizing available resistance information by insect species 



Alfalfa Plant Bug 



Adelphocoris lineolatus 

 (Goeze) 



Alfalfa Seed Chalcid 



Bruchophagus roddi 

 (Gussakovsky) 



Alfalfa Weevil 



Hypera postica 

 (Gyllenhal) 



Distribution and severity map: None 



Scientists and locations with expertise: 3 1, 16, and 20 



Check cultivars: 



Dormant and semidormant types: 

 Nondormant types: 



Resistant 



Susceptible 



Screening procedures: F 

 Evaluation procedures: None 



Distribution and severity map: None 



Scientists and locations with expertise: 22, 23, 28, and 39 



Check cultivars: 



Dormant and semidormant types: 

 Nondormant types: 



Resistant 



Susceptible 



Ranger 

 Sonora 



Screening procedures: F and L 

 Evaluation procedures: F and L (p. 27) 



Distribution and severity map: Figure 20 



Scientists and locations with expertise: 3, 5, 6, 15, 16, 20, 26, 29, 31, and 33 



Check cultivars: 



Dormant and semidormant types: 

 Nondormant types: 



Resistant 



Susceptible 



Team, Arc 



Ranger, Saranac 



Screening procedures: F and L 

 Evaluation procedures: F (p. 28) 



Egyptian Alfalfa Weevil 



Hypera brunneipennis 

 (Boheman) 



Distribution and severity map: Figure 21 



Scientists and locations with expertise: 18, 23, 28, and 33 



Check cultivars: 



Dormant and semidormant types: 

 Nondormant types: 



Resistant 



Susceptible 



Screening procedures: F 



Evaluation procedures: F (p. 28) (see procedures for alfalfa weevil) 



2 See appendix, p. 37, for approximate level of pest resistance 

 expected for the check cultivars. 

 3 See listing of resource scientists on p. 12. 



