Alternaria leaf blight of clusterbean

Radchenko, E. E.; Абдуллаев, Р. А.; Алпатьева, Н. В.; Путина, О. В.; Гасич, Е. Л.

doi:10.18699/vj19.536

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…Фрагменты пораженных тканей растений с различными симптомами поражения фитопатогенами помещали в марлевые мешочки, промывали 2 ч под струей водопроводной воды и поверхностно дезинфицировали в течение 1 мин 0,1-процентным раствором нитрата серебра, затем промывали несколько раз стерильной водой со стрептомицином и раскладывали в чашки Петри на поверхность агаризованной картофельно-сахарозной среды. Чашки инкубировали в термостате при 24°С в течение 7 суток, а затем при эритемном освещении (Radchenko et al, 2019). Выделение и размножение грибов проводили на картофельносахарозном агаре: 1000 мл картофельного экстракта (1800 г картофеля на 4500 мл воды), сахароза (40 г), агар-агар (40 г).…”

Section: материалы и методыunclassified

Phytosanitary monitoring of the narrow-leaved lupine collection of VIR in the northwest of Russia

Абдуллаев

Vishnyakova

Шеленга

et al. 2021

Trudy po prikladnoy botanike, genetike i selektsii

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Background. Narrow-leaved lupine (Lupinus angustifolius L.) is an important high-protein forage and green manure crop, also promising for food use. This is a plastic species produced under various ecogeographic conditions and the only cultivated species of lupine adapted to high northern latitudes – up to 60° NL. Gradual expansion of lupine production areas led to the accumulation of pathogens, damage to lupine crops by harmful organisms, and significant harvest losses. Breeding and cultivating resistant varieties is the most profitable and environmentally sound way to control diseases and pests. Studying the species composition of pathogens and searching for source material are the necessary stages of plant breeding for immunity.Materials and methods. A set of 101 accessions of L. angustifolius from the VIR collection were studied in the northwest of the Russian Federation (Pushkin, St. Petersburg) in 2019, and 62 accessions from the same set in 2020. Mycological examination of the affected leaves was carried out on potato sucrose agar medium under laboratory conditions. The degree of damage to plants by diseases and infestation by pests was assessed during the period of flowering, fruit formation and ripening using point scales.Results and conclusions. A wide range of harmful organisms were identified for their negative impact on the growth and development of narrow-leaved lupine plants. The dominant pest was the lupine aphid (Macrosiphum albifrons Essig), discovered in Russia for the first time. A whole set of fungal pathogens was identified, among which the most common and harmful were the causative agents of Fusarium, brown leaf spot, powdery mildew, gray mold, and Sclerotinia stem rot. Narrow-leaved lupine accessions with weak degrees of pathogenic damage were selected.

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Section: материалы и методыunclassified

Phytosanitary monitoring of the narrow-leaved lupine collection of VIR in the northwest of Russia

Абдуллаев

Vishnyakova

Шеленга

et al. 2021

Trudy po prikladnoy botanike, genetike i selektsii

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Genetic and genomic resources in guar: a review

Ravelombola

Manley²,

Adams

et al. 2021

Euphytica

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A Bacterial Wilt Disease Caused by a New Bacterial Pathogen of Guar Belonging to the Genus Pantoea Identified in Texas

Obasa¹,

Ravelombola

Avila

2023

PhytoFrontiers™

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Guar [Cyamopsis tetragonoloba (L.) Taub] or cluster bean is a legume plant that is cultivated mainly for its galactomannan (guar gum) extracted from the seed endosperm. In 2021, a disease outbreak among germplasms in the Texas A&M AgriLife Research Guar Breeding Program located in Vernon Texas was observed. Symptoms of the disease were similar to bacterial blight caused by Xanthomonas axonopodis pv. cyamopsidis and included black necrotic streaks on stems and petioles, vascular necrosis, wilting, and eventual death of affected plants. Incidence of the disease ranged from seventy-five to ninety percent in each the affected germplasms. Diagnosis of affected germplasms consistently recovered bacteria that were identified on the basis of their 16S rRNA partial gene sequence as belonging to the genus Pantoea. Two independent pathogenicity assays and the satisfaction of Koch’s postulate under greenhouse experimental conditions determined the Pantoea isolates were the causal agent of the disease. Investigations of the disease etiology also led to the discovery that the Pantoea sp. can be seed-borne. And although the disease symptoms share similarities with those of bacterial blight in guar, it differs in the absence of the large angular necrotic lesions on leaves that is characteristic of the later stage of the bacterial blight infection. However, infection by the Pantoea sp. similarly resulted in the eventual death of affected plants. Whole-genome pairwise alignments and multi-locus sequence analysis of the isolate indicate it is most closely related to P. vagans, but also distinct genetically, and tentatively designated as Pantoae sp. isolate B550.

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Alternaria leaf blight of clusterbean

Cited by 3 publications

References 12 publications

Phytosanitary monitoring of the narrow-leaved lupine collection of VIR in the northwest of Russia

Phytosanitary monitoring of the narrow-leaved lupine collection of VIR in the northwest of Russia

Genetic and genomic resources in guar: a review

A Bacterial Wilt Disease Caused by a New Bacterial Pathogen of Guar Belonging to the Genus Pantoea Identified in Texas

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