July IS. 1915 



Ascochyta Clematidina 



337 



2. On August 8 some of the plots were pruned, thus terminating the 

 main experiment. The effect of the different kinds of treatment up to 

 August 8 is shown in Table I. 



Table I. — Results of an experiment on the control of leaf-spot and stem-rot of Clem,atis 



paniculata 



The results are more uniform in bed i than in bed 2. This may be 

 due to the treatment of bed 2 the previous year. That there was more 

 disease in plots 9 and 10 than in the other plots of bed 2 may be accounted 

 for by the fact that these two plots were used as checks in 191 3, and 

 hence were neither pruned nor sprayed in that year. Plots sprayed 

 with the soap-and-sulphur mixture remained free from leaf-spot and 

 lesions on the stems; hence, their condition is rated at 100 per cent. 

 In rating the other plots the amount of leaf -spot, the number of lesions, 

 and number of girdled plants have all been considered. 



On the plots 1,3, and 17, which were sprayed with Bordeaux mixture 

 and which were not pruned on August 8, the spraying was continued to 

 the end of the season. Check plots 4, 14, and 16 also were left unpruned. 

 On October 19, when the final examination of these plots was made, it 

 was found that in plots i and 3 the leaves on the new growth were dis- 

 ease-free and that there was but an occasional dead vine. On check 

 plot 4 half of the newly formed leaves were diseased, and about one- 

 third of the vines were dead. Plots 16 and 17 showed about the same 

 amount of leaf-spot, only an occasional spot. The former, however, 

 showed more lesions on the stems than the latter. Check plots 2, 7, 10, 

 and 12, which had been pruned back to a length of 4 to 6 inches and then 

 given one application of Bordeaux mixture, had but Httle disease as 

 compared with plot 4, which had received no treatment whatsoever. 



INJURIOUS EFFECTS OF SULPHUR ON CLEMATIS PANICULATA 



The promising results obtained by Smith (12) in dusting asparagus 

 with sulphur for the control of rust led the writer to try sulphur in con- 

 92315°— 15 5 



