Phytophthora blight of Pigeonpea [Cajanus cajan (L.) Millsp.]: An updating review of biology, pathogenicity and disease management

Pande, S and Sharma, M and Naga Mangla, U and Ghosh, R and Sundaresan, G (2011) Phytophthora blight of Pigeonpea [Cajanus cajan (L.) Millsp.]: An updating review of biology, pathogenicity and disease management. Crop Protection, 30 (8). pp. 951-957. ISSN 0261-2194

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Abstract

Phytophthora blight (PB), Phytophthora drechsleri Tucker f.sp. cajani (Pal et al.) Kannaiyan et al. is reoccurring as an economically important disease of pigeonpea [Cajanus cajan (L.) Millsp.], especially when excessive rains fall with in short span of time and hot and humid weather persists during the crop season. A few years after the initial reviews of Kanniyan et al. (1984), the disease was coming to halt. Despite earlier investigations on pathological and physiological characteristics of P. drechsleri f. sp. cajani, the nature of infection process and genetic basis of pathogen variability have not been clearly established. Therefore, information on the biology and survival of the pathogen is needed to devise effective management strategies. Attempts have been made to develop green-house and field screening techniques three decades ago for identification of HPR. However, only few pigeonpea germplasm and breeding lines belonging to cultivated and wild Cajanus spp. were found tolerant to PB. The recent frequent recurrence of PB epidemics in the major pigeonpea growing areas prioritized the search for higher levels of disease resistance. There is a need to study the biology of the pathogen, epidemiology of the disease and refinement of the resistance screening techniques and develop integrated disease management (IDM) technology for the disease. In this review, the symptomatology of the disease, biology of pathogen including its variability, epidemiology, sources of resistance, other management options, and available information on biochemical and genetic basis of disease resistance have been updated and discussed with the identification of future research priorities.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Uncontrolled Keywords:	previous termBiologynext term, Epidemiology, previous termManagement, Phytophthoranext term drechsleri f. sp. cajani
Agro Tags:	<b>Agrotags</b> - fungi | planting | diseases | disease transmission | blight | symptoms | pathogens | farms | fruits | crops <br><b>Fishtags</b> - drying <br><b>Geopoliticaltags</b> - india | asia | delhi | maine | puerto rico | americas | africa | andhra pradesh
Subjects:	Mandate crops > Pigeonpea
Depositing User:	Siva Shankar
Date Deposited:	25 May 2011 06:34
Last Modified:	08 Jun 2012 04:40
URI:	http://oar.icrisat.org/id/eprint/32
Official URL:	http://dx.doi.org/10.1016/j.cropro.2011.03.031
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	The authors are thankful to the support and cooperation of ICRISAT’s Legumes Pathology staff particularly Mr Rangaswamy Reddy for literature collection and Ms Rohini for typing the manuscript. Finally authors thank Dr Rajan Sharma and Dr Harikishan Sudini for critical review and useful suggestions.
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