49 
Bursa-pastoris), were also killed by the fungus. On the other hand 
germinating oats were not attacked, neither were those of another 
grass, Briza maxima. our Petri dishes containing eee 2 
garden soil, sterilised by steam and afterwards infected wit 
Thielavia in the Milowia stage, obtained from a pure culture on 
manure, were prepared. Two of these were flooded with one per 
cent. of formalin in water for an hour, after which the liquid was 
poured off and the soil allowed to remain for a week, when all trace 
of the smell of formalin had disappeared. The soil in the two 
remaining dishes was left untreated. Twelve peas were placed in 
each dish. At the expiration of ten days, all the peas in the two 
dishes treated with formalin were maxing vigorous growth, whereas 
ir one of the dishes not treated with formalin, no growth appeared 
above the surface of the soil, and in the second untreated dish four 
collapsed with one exception. When peas germinate in pure sand, 
mixed with the Milowia stage of the fungus attached to fragments 
of manure, infection of the seedlings occurs, whereas when spores 
of the Milowita stage of the fungus alone are mixed with the sand, 
no infection takes place. This, along with experiments already 
recorded, proves that the germinating spores of the fungus cannot 
infect a host-plant directly, but only after the mycelium has existed 
or some time as a saprophyte, on humus or decaying vegetable 
matter. 
Symptoms oF THE DrisEAsE IN SWEET PkEas, 
In those instances where the land is badly infected, the majority 
This occurs when 
very common symptom of the disease is known to growers of sweet 
peas under the name of “streak” or “stripe,” characterised by the 
resence of dingy yellow streaks or stripes on the leaves and stem. 
This condition is the result of what may be termed a mild attack, 
the not being present in the tissues of the root and collar in 
sufficient quantity to {Gill the plant outright, yet sufficiently abundant 
to prevent the root from performing its function to the fullest 
22242 ad 
Mo. Bet. Waku. 
1019 
