Blackleg and soft rot of potato in KPK: Inoculums sources, disease incidence severity

Comprehensive surveys (spring, summer and fall, 2007-2009) were conducted in the major potato-growing areas of KPK to record the incidence, severity and distribution of blackleg and soft rot of potato caused by the different subspecies of Erwinia. Maximum disease severity (40 %) and disease incidenc...

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Published inSarhad journal of agriculture Vol. 26; no. 3; pp. 397 - 404
Main Authors Ali, H.F. (KPK Agricultural Univ., Peshawar (Pakistan)), Ahmad, M. (KPK Agricultural Univ., Peshawar (Pakistan)), Junaid, M. (KPK Agricultural Univ., Peshawar (Pakistan)), Bibi, A. (KPK Agricultural Univ., Peshawar (Pakistan)), Ali, A. (KPK Agricultural Univ., Peshawar (Pakistan)), Sharif, M. (KPK Agricultural Univ., Peshawar (Pakistan)), Ali, B. (Agricultural Research Inst., Peshawar (Pakistan)), Sadozai, A
Format Journal Article
LanguageEnglish
Published 2010
Subjects
BLACKLEG
DISEASE SURVEYS
ERWINIA CAROTOVORA
ERWINIA CHRYSANTHEMI
IDENTIFICATION
ISOLATION
MORBIDITY
PAKISTAN
POPULATION DYNAMICS
ROTS
SOLANUM TUBEROSUM
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Summary:Comprehensive surveys (spring, summer and fall, 2007-2009) were conducted in the major potato-growing areas of KPK to record the incidence, severity and distribution of blackleg and soft rot of potato caused by the different subspecies of Erwinia. Maximum disease severity (40 %) and disease incidence (60-75 %) was found in the spring and summer potato crop grown in Abbottabad, Swat and Mardan. The frequencies of Erwinia carotovora subsp. atroseptica (Eca), E. c. subsp. carotovora (Ecc) and Erwinia chrysanthemi (Ech), based upon the survey of 42 locations, were found to be 48%, 45%, and 7%, respectively. Regarding soil, diseased plant debris and seed potatoes as sources of inoculum for Eca, healthy plant material, potted un-sterilized soil and healthy seed potatoes were inoculated with Eca, kept in screen-house and monitored for changes in bacterial population over a period of three months.
Bibliography:H20
CATPAK-75622
ISSN:1016-4383