20 



The various asparagus beds on moist soils do not appear to be 

 affected with the summer stage of the rust and consequently are not 

 injured, being able, as it were, to resist the summer stage although 

 the tops of the plants are affected with the fall stage during their 

 period of natural death. 



The best means of controlling the rust is by- 

 thorough cultivation in order to secure vigorous 

 plants, and in seasons of extreme dryness plants 

 growing on very dry soil with little water-retaining 

 properties should if possible receive irrigation. 



From a knowledge of the occurrence of the rust in Europe and 

 from observations made in this State we are led to believe that the 

 outbreak of the asparagus rust is of a sporadic nature,. and is not 

 likely to cause much harm in the future, provided attention is given 

 to the production of vigorous plants. 



EXPLANATION OF PLATES. 



Plate I. 



Asparagus stem with fall or teleuto stage of the rust ; somewhat 

 enlarged. 



'O' 



Plate II. 



Fig. 1. Portion of a cluster of summer or uredospores. X225. 



Fig. 2. Portion of one of the aecidial cups or spore clusters of 

 the spring stage, with chains of spores. XI 50. 



Fig. 3. Spore bearing conceptacles of the parasitic Darluca in a 

 cluster of uredospores. X"5. 



Fig. 4. Teleutospores. X225. 



Fig. 5, Cluster of teleutospores. X75. 



Plate I. and Plate II. Figs. I, 3, 4 and 5 are original. 



Plate II. Fig. 2 copied from Halsted. 



