10 



James Stewart Wiant 



area where the disease had been prevalent in previous years. The inci- 

 dence of disease was low in contrast with that of 1925 and 1926. The 

 beds used for the experiments on control were, on the other hand, spring- 

 sown and purposely located in infested areas. Severe damping-off occurred 

 in most of the check plats. The relative importance of the two factors, 

 location and time of seeding, is considered elsewhere in this Avork, but 

 it is interesting to note here the pronounced difference in prevalence of the 

 disease between the two areas jus.t referred to. The losses from damping- 

 off at the Keene nursery for the three years 1925 to 1927 inclusive, are 

 summarized by species in table 1, those for the experimental beds where 

 soil treatments were employed not being included. 



TABLE 1. 



Losses from Damping-Off at the Keene Nursery from 1925 to 1927 

 Inclusive 





* The seed was of low viability, and so counts were not made. 



The data for 1925 were estimated from the final stand one year after 

 seeding, and are therefore only approximations. The figures for 1926 

 and 1927 were based partly upon estimates from careful observations during 



