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ON THE OCCURRENCE, PERPETUATION AND CONTROL OF GRAM (CICER ARIETINUM L.) BLIGHT CAUSED BY ASCOCHYTA RABIEI (PASS.) LABROUSSE, WITH SPECIAL REFERENCE TO INDIAN CONDITIONS
Author(s) -
SATTAR A.
Publication year - 1933
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1933.tb07448.x
Subject(s) - blight , biology , ascochyta , germination , gram , spore , crop , horticulture , malic acid , botany , agronomy , bacteria , genetics , food science , citric acid
SUMMARY. 1. The importance and distribution of blight of gram are described. 2. The field appearance of blight, and the influence of environmental factors such as rainfall, temperature, wind and cultural practices on its incidence and development have been studied. The occurrence of blight in various parts of India is shown to be highly correlated with the amount of rainfall during the flowering and fruiting periods of the gram crop. 3. It is shown that the gram plant increases in susceptibility with age and is most susceptible at the flowering and fruiting stages. This susceptibility has been found to be directly proportional to the amount of malic acid secreted by the plant on its surface. 4. Germination of spores of A. Rabiei has been studied in some detail, and it has been found that they are favoured in their germination by the presence of N /50‐ N /25 malic acid or acidified carbon food ( p H 2–5). 5. Modes of transmission of blight from one year to another are described. 6. Measures to control blight are given and some new lines of attack have been indicated. The writer wishes to record his indebtedness to Prof. Luthra and to Mr Zafar Alam of the Agricultural College, Lyallpur, Punjab, for their assistance in providing diseased specimens and healthy seeds of the gram plant, and to Prof. W. Brown of the Imperial College of Science and Technology, London, for help and advice given during the period of two years' study leave which the author spent in England.