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Birsa Agricultural University, Ranchi

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1993 - 19972
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Author: Ashok Kumar × End date: 2019 × Type: Thesis ×
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    ThesisItemOpen Access
    Participation of Scheduled Caste Women in Farm and Home Activities
    (Birsa Agricultural University, Ranchi, 1997) Ashok Kumar; R.P.Singh "Ratan"
    The conclusion drawn from the above finding lead to summaries that wide spread illiteracy among scheduled caste farm woman and their poor socio – economic status have compelled them to be unware and ignorant of the new developments in farming as well as their very poor input in farm related decisions. On the other hand it is evident from the finding that womens higher rates of indepentdent participant in farm and home related activities have affected their health adversely leading to a number of minor and major health hazards/problems.
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    ThesisItemOpen Access
    Investigations On Spot Blotch Of Barley (Hordeum Vulgare L) Caused By Helminthosporium Sativa P.K. & B, In Plateau Region of Bihar
    (Birsa Agricultural University, Ranchi, 1993) Ashok Kumar; K.K.Rai
    Spot blotch of barley" caused by Helminthosporium sativum P.K. & B is a serious disease of Chotanagpur region where ever barley is grown. The symptoms appeared as round to oblong spots on the leaf with dark brown centres, spots coalesced forming the blotches, progressed from older to younger leaves till it dried up wholly or partially. Iso lation, morphological studies and pathogenicity revealed that the causal agent was H. sativum. There was heavy reduction in the size of spores when transferred from host to different culture media. The growth in solid medium was maximum in oat meal agar (90 mm) whereas the excellent sporulation was observed on Czapek's medium. Amongst liquid media tried, Richards' medium gave the best growth (346.20 mg) and Knop's medium gave excellent sporulation. Optimum temperature was found to be 25 + 1°C for the maximum growth and 30 ± 1°C for excellent sporulation. Maximum growth and excellent sporulation were recorded at pH 6.0. As a carbon source, Glucose was found to be the best for growth whereas Potassium nitrate was found to be the best source of nitrogen for the growth of H. sativum. The viability of the conidia in culture (in diffused light & room temperature) was above 90 per cent during first three months which decreased to 2.67 per cent after a year. The fungus could infect barley, oat, wheat, doob and marua but, it did not do so in case of Jowar. BHD 21 was found to be resistant and the other three varie ties viz; K 18, BR 31 and RS 6 were found to be moderately resistant against the pathogen (H. sativum). In vitro and in vivo trials, Dithane M-45 (0.2%) and Blitox (0.2%) controlled the growth of the pathogen significantly having the minimum disease intensity 8.25% and 16.69%, respectively