Important Diseases of Soybean Crop and Their Management

Yadav, V. K.; Khare, C.P.; Tiwari, Puspa; Srivastava, J. N.

doi:10.1201/9780429321962-9

Cited by 1 publication

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“…Alternaria alternata attacks bean leaves causing characteristic small irregular brown lesions which can turn black with centered rings [ 5 ]. Spotting occurs on lower and mature leaves, and the lesions may dry and fall off causing a shot-hole appearance on the leaf when the infection is severe or combined to form huge necrotic spots [ 6 ]. Heavily spotted leaves may become yellow, wither, and fall due to water deficiency [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Control of Alternaria Leaf Spot of the Common Bean (Phaseolus vulgaris L.) Using Soil-Derived Biological Agents

Karonji,

Odhiambo,

Muli

et al. 2024

Scientifica

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Phaseolus vulgaris L. is considered one of the most essential legume crops in Kenya. Alternaria alternata is an economically significant plant pathogen that causes Alternaria leaf spot which accounts for over 70% yield losses of beans in Kenya. Chemical fungicides based on copper and sulfur are used to control Alternaria leaf spot in bean plants, but their prolonged use has adversely affected the environment and the health of workers. Herein, we tested the biocontrol potential of bacterial agents from soil planted with Rosecoco bean plants infected with A. alternata. Using bacterial suspensions at different time intervals, we evaluated the putative bacterial biocontrol activity against A. alternata under greenhouse conditions. B. subtilis and B. velezensis bacterial biocontrol agents significantly suppressed disease severity by 20% and 21.2% on the 45th day, respectively. Our study demonstrates that B. subtilis and B. velezensis are promising biocontrol agents that could be integrated in the management of Alternaria leaf spot.

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Section: Introductionmentioning

confidence: 99%