BREEDING SNAPDRAGONS 9 



in some seasons the strains have appeared somewhat more resistant to wilt than 

 commercial varieties. Some roguing and selection is still necessary where 100 

 percent pure-breeding color lines are wanted. However, the few color mixtures 

 have not been objectionable to date. The response of these strams to rust under 

 all climatic conditions is not known or guaranteed. The strains can be propagated 

 from cuttings, and so far have withstood rust tests in the field for three seasons. 



Figure 1. 

 Upper: Showing plant vigor, free flowering habit, and rust resistance of Wallham Field Station 

 hybrids. 



Lower: Right, plant selections showing hereditary susceptibility to rust. Only a very few plants 

 have not been destroyed by the disease. Left, plants showing inheritance of resistance 

 to rust. 



