Incidence of base rot and wilt, sanitary severity and influence about seed pathology by cultivars of common bean (Phaseolus vulgaris)

Mateus Paulino Braga,Anderson Rodrigues Rietjens,Luana Machado Rezende,Milton Luiz Da Paz-Lima,Jakelinny Martins Silva,Natanael Marcos Lemes,Ana Livia Lemos Oliveira,Lucinete Martins Barbosa Estrela,Laryssa Lucas Araújo Silva

doi:10.1590/1808-1657000112018

Mateus Paulino Braga, Anderson Rodrigues Rietjens + Show 7 more

Open Access

https://doi.org/10.1590/1808-1657000112018

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Abstract

ABSTRACT: The objective of this work was to conduct a temporal evaluation of incidence of rot base and sanitary severity, and to relate the impact on the seed pathology of common bean cultivars. In the 2015-2016 harvest, in the city of Ipameri, Goiás, ten cultivars of common bean were evaluated (BRS Estilo©, BRS Pérola©, IPR Tangará©, IPR Tuiuiú©, IPR Uirapuru©, IAC Milênio©, Imperador©, IAC F3 R2©, IAC OTG© and IPR Campos Gerais©) and distributed into five blocks, totaling 40 experimental units. The incidence of wilt and base rot and sanitary severity were analyzed by taking ten random samples per block at 21, 28, 56, 63 and 69 days after planting. At the end of 120 days, a total of 20 plants were harvested per cultivar, and 250 seeds were harvested for application of the Blotter Test method. From 21 to 69 days after planting, the cultivars BRS Pérola© and IPR Campos Gerais© deserve to be highlighted for presenting the lowest incidence of wilt in the reproductive and vegetative cycles. The cultivar BRS Pérola© showed the lowest incidence of wilt and sanitary severity. In the analysis of harvested seeds, the cultivar BRS Pérola© presented high physiological quality for all evaluated parameters. On the other hand, Cramberry (OTG)© showed low physiological potential in germination and vigor tests.

Highlights

The common bean (Phaseolus vulgaris L. - Fabaceae) is cultivated by small and large growers, in different production systems and in all Brazilian regions, having great economic and social importance (AIDAR et al, 2003)
The fusariumwilt is an important disease caused by a parasitic fungus that economically affects important species in the world, such as cotton, bananas, tomatoes, legumes and flowers. This pathogen was first identified infecting common bean in 1929 in the USA, and since the species has been characterized as being Fusarium oxysporum f. sp. phaseoli (Fop)
The objective of this work was to conduct a temporal evaluation of the incidence of base rot/wilt and sanitary severity and influence about seed pathology of common bean commercial cultivars

Summary

Introduction

The common bean (Phaseolus vulgaris L. - Fabaceae) is cultivated by small and large growers, in different production systems and in all Brazilian regions, having great economic and social importance (AIDAR et al, 2003). The fusariumwilt is an important disease caused by a parasitic fungus that economically affects important species in the world, such as cotton, bananas, tomatoes, legumes and flowers This pathogen was first identified infecting common bean in 1929 in the USA, and since the species has been characterized as being Fusarium oxysporum f. The graybean rot caused by Macrophomina phaseolina produce dark lesions in the epicotyls and hypocotyls of seedlings, provoking deaths in the pre and post emergence due to obstruction of the xylem and wilting vessels. In adult plants it causes root lesions of annular color, varying from red to brown, and produces dark to black mycelium, replete with microsclerotia. The stem presents through black longitudinal cracks that lead to defoliation and wilt (ABAWI; PASTOR-CORRALES, 1990)

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