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1963 - 19662
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End date: 1966 × Start date: 1963 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Studies on the nodal infection of red rot of sugarcane
    (Faculty of the Post Graduate School, Indian Agricultural Research Institute, New Delhi, 1963) Wilson, K I; KAU; Chona, B L
    The reaction of 6 sugarcane varieties to red rot infection through the nodal region caused by Colletotrichum falcatum Went was studied. Cane varieties Co. 445, Co. 331, Co. 312 and Co. 1181 were found to be susceptible while Co.1070 and Co. 286 proved to be moderately resistant to nodal infection. The fungus persited in an incipient form in the nodal regions of apparently healthy stalks of sugarcane. A number of leaf - sheaths also yielded the fungus on isolation. The leaf - sheath water (the water accumulated in the cavity between the leaf-sheath and stalk) collected from the above 6 varieties of sugarcane stimulated the spore germination of the fungus. The presence of sugars viz., sucrose and laevalose, detected in the leaf sheath water by paper chromatographic analysis, is believed to be responsible for the stimulation of spore germination.
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    ThesisItemOpen Access
    Study of differential adoption of improved farm practices in relation to reference group influence and community norms
    (Faculty of the Post Graduate School, Indian Agricultural Research Institute, New Delhi, 1966) Sankaran Potti, V S; KAU; Sharma, S K
    This research study, entitled "A study of differential adoption of improved farm practices in relation to reference group influence and community norms" was conducted during the period 1964-1965 in Khanjawala block in the Union Territory of Delhi. The objectives of the study have been: (1) To study adoption of farm practices as a function of reference group influence. (2) To find out the composition of reference groups which influence adoption behaviour. (3) To study the influence of community innovativeness norms on individual innovativeness. (4) To study the extent to which community innovativeness norms are related to other community characteristics. Three villages, out of the total of fifty six villages in Khanjawala block, representing three different types of community as social system norms, namely, modern, transitional and traditional were selected for the study. The respondents of the study constited of 222 farmers representing the total number of heads of farming families residing in these three villages.