Distributional spectrum of bacterial wilt of chili incited by Ralstonia solanacearum in Pakistan

IF 1.2 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY
Muhammad Naveed Aslam, T. Mukhtar
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引用次数: 4

Abstract

: The production of chili is seriously threatened by bacterial wilt incited by Ralstonia solanacearum in Pakistan. As the information about the distribution and prevalence of the disease and the pathogen is scarce, the present study was performed to ascertain the prevalence, occurrence and distribution of R. solanacearum in different regions of chili cultivation. The results showed differences in the incidence and prevalence of bacterial wilt all over the country. Overall, an incidence of 10% and prevalence of 76% of the disease was observed in the country. The highest incidence of bacterial wilt was observed in the province of Sindh whereas it was the lowest in Baluchistan. The prevalence of the disease followed the similar trend in the provinces. As regards agroecological zones, the highest incidence was recorded in Indus delta followed by sandy deserts whereas it was the lowest in western dry mountains. Almost the same tendency was observed regarding prevalence in the eight agroecological zones. In case of districts, the disease incidence was the maximum in Badin while it was the minimum in the district of Loralai. On the other hand, the disease prevalence was the maximum (100%) in the districts of Badin, Mirpurkhas, and Thatta and the minimum (60%) in the districts of Barkhan, Karak, and Loralai. Of the total 114 isolates of R. solanacearum , 81% were confirmed as Biovar 3 whereas the rest 19% isolates were identified as Biovar 4. The findings will help the farmers to design disease management programs accordingly to avert yield losses.
辣椒青枯病在巴基斯坦的分布谱
在巴基斯坦,辣椒的生产受到了由Ralstonia solanacearum引起的细菌性枯萎病的严重威胁。由于目前有关该病害及病原菌的分布、流行情况的资料较少,本研究旨在了解茄红病菌在辣椒栽培不同地区的流行、发生和分布情况。结果表明,青枯病在全国各地的发病率和流行率存在差异。总体而言,该国观察到该病的发病率为10%,流行率为76%。信德省青枯病发病率最高,而俾路支省发病率最低。该疾病的流行在各省也有类似的趋势。在农业生态区,发病率最高的是印度河三角洲,其次是沙漠,西部干旱山区发病率最低。8个农业生态区的流行趋势几乎相同。就各区而言,该病发病率在巴丁最高,而在罗拉莱区最低。另一方面,疾病患病率在Badin、Mirpurkhas和Thatta区最高(100%),在Barkhan、Karak和Loralai区最低(60%)。114株真菌中,81%鉴定为生物变种3型,19%鉴定为生物变种4型。研究结果将帮助农民设计相应的疾病管理方案,以避免产量损失。
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来源期刊
Bragantia
Bragantia AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
2.40
自引率
8.30%
发文量
33
审稿时长
4 weeks
期刊介绍: Bragantia é uma revista de ciências agronômicas editada pelo Instituto Agronômico da Agência Paulista de Tecnologia dos Agronegócios, da Secretaria de Agricultura e Abastecimento do Estado de São Paulo, com o objetivo de publicar trabalhos científicos originais que contribuam para o desenvolvimento das ciências agronômicas. A revista é publicada desde 1941, tornando-se semestral em 1984, quadrimestral em 2001 e trimestral em 2005. É filiada à Associação Brasileira de Editores Científicos (ABEC).
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