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Leaf blast disease in finger millet [ Eleusine coracana (L.) Gaertn.] caused by Bipolaris sorokiniana Sacc.: a histopathological study
Journal of Plant Diseases and Protection ( IF 2 ) Pub Date : 2020-07-14 , DOI: 10.1007/s41348-020-00355-5
Pereira Preethi , M. S. Sharada , C. R. Divya

Finger millet (Eleusine coracana L.) is a staple food in many African and South Asian countries and is ranked fourth among millets produced worldwide. Finger millet crops are affected by a number of diseases, including blast disease, which is the most destructive and widely distributed disease of the world. It is generally caused by Pyricularia grisea (Cooke) Sacc. We observed blast like symptoms in finger millet crops in the field in Doddamaragowdana halli, Mysore District, India. The infected leaves were subjected to analysis to identify the causative agent. Histopathological studies were conducted at different stages of infection (namely 3, 6, 12, 24, 48 till 72 h) and infection process was observed beginning with adhesion of conidia on the leaf surface, production of germ tube, aspersorium formation followed by formation of hyphae and conidia. Based on the morphological characteristics of the colony, conidiophores and conidia as well as by performing Koch’s postulate the organism was identified. Based on our results, the pathogen isolated from the foliar samples of finger millet collected from infected field was identified as Bipolaris sorokiniana Sacc. To our knowledge, this is the first report of blast disease in finger millet caused by Bipolaris sorokiniana Sacc.



中文翻译:

Bipolaris sorokiniana Sacc。引起的手指粟[Eleusine coracana(L.)Gaertn。]叶瘟病:组织病理学研究

手指小米(Eleusine coracana L.)是非洲和南亚许多国家的主食,在全世界生产的小米中排名第四。粟类作物受到多种疾病的影响,包括疾风病,这是世界上最具破坏性和广泛分布的疾病。通常是由稻瘟病菌引起的(可乐)我们在印度迈索尔区Doddamaragowdana halli的田间的小米作物中观察到爆炸样症状。对感染的叶子进行分析以鉴定病原体。在感染的不同阶段(即3、6、12、24、48到72小时)进行了组织病理学研究,观察到感染过程始于分生孢子在叶表面的附着,胚芽管的产生,曲霉的形成以及随后的孢子形成。菌丝和分生孢子。基于菌落的形态特征,分生孢子和分生孢子以及通过执行科赫的假设来鉴定该生物。根据我们的结果,从感染场采集的手指粟叶面样品中分离出的病原体被鉴定为Bipolaris sorokiniana萨卡 据我们所知,这是由Bipolaris sorokiniana Sacc引起的小米瘟病的首次报道。

更新日期:2020-07-14
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