54 DIPLODIA CORCHORI SYD. 
Plot G. This plot, about }th acre, was situated outside Pusa in land which 
had not been under jute for many years and which had no other jute near it. 
The crop was grown from treated seed (* kakya bombai”’) sown on 11th March. 
The plot was about $ acre in size and germination was at first uneven owing 
to deficiency of moisture. The crop did not reach a good height but was 
fairly thick in the stem ; one end suffered considerably from flooding. There 
were about 60 cases of Diplodia in this crop. 
In 1919 a further series of field experiments was made. 
Plots A and C. These plots were sown with seed of ‘“ kakya bombai” 
about 5th March, the former with treated and the latter with untreated seed. 
D. Corchori was practically absent in both these plots, only some 3 or 4 cases 
could be seen. A crop of Corchorus olitorius in Plot B and one of red-stemmed 
C. capsularis in Plot D also remained free from the disease. 
Plots E and F. These two plots from last season’s experiment were 
again sown with jute of the variety “kakya bombai,” the seed used had 
been steeped in a solution of copper sulphate, and this land had been under jute 
since 1917. In 1919, therefore, germination was very scanty. Both plots 
were resown on 4th July, after the commencement of the rains, and gave a 
crop of typical late sown jute, short in height and thin in stem. In both plots 
the number of stems infected with D. Corchori was negligible, only 
about 12 cases could be found when the crop was cut early in November, 
Thus in these plots the disease was less in 1919 than in the previous 
season. 
Plots H and kK. About 4rd of each plot was sown on 5th March with a 
red-stemmed variety of Corchorus capsularis and the remainder with “ kakya 
bombai.” These plots were situated in the land which had carried the 
dis eased jute in 1918. Both the varieties of seed sown had been steeped in 
2 per cent. copper sulphate. Plot H carried a very scanty crop and had 31 
cases of D. Corchori among the “kakya bombai”’ stems and only 6 cases in 
the red-stemmed variety. In plot K the crop was much thicker, both 
germination and growth having been better than in plot H. In Plot K there 
were 190 cases of D. Corchort among the “ kakya bombai” stems and 34 
cases in the red-stemmed variety. 
In both these plots, allowing for the larger proportion sown with “ kakya 
bombai,” the red-stemmed variety suffered less than the green-stemmed. This 
result agrees with the result from infections upon red and green-stemmed 
varieties of jute (see Exp. XV), but at the same time it must not be lost sight 
of that the disease can infect red-stemmed jute in the field as is shown by the 
record at Dacca in 1919, 
