Volume 31, Issue 2
February 1950, pages 67-133
pp 67-102 February 1950
pp 103-110 February 1950
Large-scale production of ergot has been in progress, on the Nilgiris, under the auspices of the Madras Government. Rye grows well only above 5,600 ft. The crop sown in April gives highest yield of ergot. Six to eight sprayings are necessary for maximum infection. The larger number of rainy days during the flowering period favours infection. Manures do not have any influence in yield or quality of ergot. Australian black winter rye and local rye are suited for large-scale production of ergot. The pathogenicity trials are described. The quality of the ergot was improved by selection of sclerotia containing a high percentage of alkaloids for obtaining cultures. The alkaloid content of the Nilgiri ergot was raised from 0·19 per cent. to 0·40 per cent.
pp 111-119 February 1950
pp 120-124 February 1950
Out of the twelve cuttings from each vine, the first four cuttings took longer period for germination than the rest.
Germination in 1st to 3rd cuttings was slightly lower than in 4th to 12th cuttings.
Mortality due to poor development of root system was observed in 7th to 12th cuttings.
Mortality due toPhytophthora parasitica var.piperina Dast. was higher in 7th to 12th than in 1st to 6th cuttings.
The rate of growth was highest in the 1st cutting.
The yield ofpan leaves was highest in the 1st cutting.
The first three cuttings are recommended for ‘seed ’ purposes.
pp 125-133 February 1950