Expression of Ergot Resistance in Pearl Millet Under Artificially Induced Epidemic Conditions

Thakur, R P and King, S B and Tao, V P (1989) Expression of Ergot Resistance in Pearl Millet Under Artificially Induced Epidemic Conditions. Phytopathology , 79 (12). pp. 1323-1326. ISSN 0031-949X

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Resistance to ergot (Cfavkeps fusiformis) in pearl millet, previously identified by using an inoculation technique for field screening, was tested under artificially induced epidemics in the field and greenhouse. The epidemic conditions were created by repeated spray inoculation of protogy-nous panicles with an aqueous honeydew conidial suspension (1 X I06 conidia/ml) under conditions of high relative humidity (>90%) or panicle wetness (>80%) and moderate temperature (20-30 C). There were no significant differences in ergot reactions under artificially induced epidemic conditions and field screening for resistant (<10% mean ergot severity) or susceptible (>30% mean ergot severity) cultivars. However, cultivars that were moderately resistant (10-30% ergot seventy) in field screening showed very low ergot (<2% mean severity) that were comparable to the highly resistant cultivars, under epidemic conditions both in field and greenhouse- The results suggest that an ergot severity threshold level of 20-30% in field screening should provide adequate levels of functional field resistance under natural ergot epidemic conditions. Pearl millet cultivars with moderate levels of ergot resistance and having desirable agronomic traits may be suitable for cultivation in areas where ergot is of economic importance.

Item Type: Article
Uncontrolled Keywords: Pennisetum glaucum.
Subjects: Mandate crops > Millets
Depositing User: Library ICRISAT
Date Deposited: 12 Dec 2011 10:45
Last Modified: 12 Dec 2011 10:45
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Acknowledgement: UNSPECIFIED
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