Higher relative humidity and more moderate temperatures increase the severity of rice false smut disease in the rice–crayfish coculture system

Song, Jinhui; Wang, Yan; Chen, Linrong; Zhang, Si-Jie; Chuan, N. G. Chuck; Di, Zhu; Liang, You; Junfei, Luo; Dou, Zhi; Gao, Hongsheng; Dai, Qigen; Xu, Ke; ZhongYang, Huo

doi:10.1002/fes3.323

Cited by 5 publications

(2 citation statements)

References 45 publications

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“…The pooled analysis revealed that the disease severity was negatively correlated with maximum and minimum temperature with -0.96 and -0.87 respectively which indicated that the disease progression was significantly decreased by increasing both maximum and minimum temperature. Jiehui et al, (2021) also reported that the incidence of rice false smut was significantly correlated with average temperature at fortnight intervals after ear head emergence. This finding supported the approach of this study on designating the influence of temperature during the smut ball formation as it was the important indicator for increasing the disease severity in rice.…”

Section: Correlation Between Weather Parameters and Disease Severitymentioning

confidence: 90%

Influence of weather parameters on rice false smut disease progression in Tamil Nadu, India

P. ANBAZHAGAN,

M. THERADIMANI,

V. RAMAMOORTHY

et al. 2024

J. Agrometeorol.

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False smut of rice is an upcoming menace to rice production in India. In order to understand the intricate relationship between disease incidence and weather parameters, field experiments were conducted for three years (2019, 2020 and 2021) in two cropping seasons viz., late kharif (August to November) and rabi (October to January) at the Agricultural College and Research Institute (AC & RI), Madurai, Tamil Nadu. Results revealed that the disease severity had positive correlation with relative humidity (RH), wind speed (WS) and bright sunshine hours (BSS) and negative correlation with heavy rainfall (RF), evaporation (EP) and temperature. The pooled data analysis (2019 and 2020) for the late kharif and rabi cropping season revealed that disease severity was perfectly showed positive correlation with relative humidity (0.80) and wind speed (0.83) and negatively correlated with weekly maximum temperature (-0.78) and minimum temperature (-0.84). The step wise linear regression analysis was performed which revealed that among the six weather factors minimum temperature influenced the false smut disease severity up to 92%.

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Section: Correlation Between Weather Parameters and Disease Severitymentioning

confidence: 90%

Influence of weather parameters on rice false smut disease progression in Tamil Nadu, India

P. ANBAZHAGAN,

M. THERADIMANI,

V. RAMAMOORTHY

et al. 2024

J. Agrometeorol.

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show abstract

“…A study was conducted to use the methodology with a slight modification of a low-temperature treatment (2 days at 20°C) to obtain highly infected spikelets (Hu et al, 2020). This considerably Previous studies demonstrated that inoculation was necessary during the booting stage and that infection establishment after the panicles headed was exceedingly challenging (Jiehui et al, 2022). This might be connected to the filament's structure and physiological status.…”

Section: Infection Processmentioning

confidence: 99%

Rice false smut pathogen: implications for mycotoxin contamination, current status, and future perspectives

Zhou,

Mubeen,

Iftikhar

et al. 2024

Front. Microbiol.

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Rice serves as a staple food across various continents worldwide. The rice plant faces significant threats from a range of fungal, bacterial, and viral pathogens. Among these, rice false smut disease (RFS) caused by Villosiclava virens is one of the devastating diseases in rice fields. This disease is widespread in major rice-growing regions such as China, Pakistan, Bangladesh, India, and others, leading to significant losses in rice plantations. Various toxins are produced during the infection of this disease in rice plants, impacting the fertilization process as well. This review paper lightens the disease cycle, plant immunity, and infection process during RFS. Mycotoxin production in RFS affects rice plants in multiple ways, although the exact phenomena are still unknown.

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Baseline Sensitivity and Control Efficacy of Two Quinone Outside Inhibitor Fungicides, Azoxystrobin and Pyraclostrobin, AgainstUstilaginoidea virens

et al. 2022

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Rice false smut caused by the filamentous fungus Ustilaginoidea virens is a devastating grain disease in rice. Fungicides have been an important measure for the control of this disease. In this study, baseline sensitivities of 179 isolates of U. virens to QoI fungicides azoxystrobin and pyraclostrobin were established. The distribution of the 50% effective concentration (EC50) values of each fungicide was unimodal. The frequency distribution of logarithmically transformed EC50 values fitted orand fitted closer to a normal distribution. The ranges of EC50 values for azoxystrobin and pyraclostrobin were 0.001 to 0.864 and 0.001 to 0.569 μg/mL, with means and standard errors of the mean values of 0.203 ± 0.012 and 0.079 ± 0.006 μg/mL, respectively. There was a statistically significant and moderate positive correlation (n = 100, r = 0.469, P = 0.001) in sensitivity between these two fungicides. No cross-resistance was found between azoxystrobin, pyraclostrobin and carbendazim or DMI fungicides. Each fungicide had a significantly higher mean preventive efficacy compared to its curative efficacy. Field assays showed that control efficacy of pyraclostrobin against rice false smut was greater compared tothan that of azoxystrobin. Pyraclostrobin had the best control of rice false smut in three rice varieties with the control efficacy ranging from 81.5% to 95.5%, whereas azoxystrobin decreased disease index by 64.1% to 69.2% under the same conditions. These results provide us a reference point in the management of U. virens and future QoI fungicide resistance monitoring programs.

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Higher relative humidity and more moderate temperatures increase the severity of rice false smut disease in the rice–crayfish coculture system

Abstract: This is an open access article under the terms of the Creat ive Commo ns Attri bution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 5 publications

References 45 publications

Influence of weather parameters on rice false smut disease progression in Tamil Nadu, India

Influence of weather parameters on rice false smut disease progression in Tamil Nadu, India

Rice false smut pathogen: implications for mycotoxin contamination, current status, and future perspectives

Baseline Sensitivity and Control Efficacy of Two Quinone Outside Inhibitor Fungicides, Azoxystrobin and Pyraclostrobin, AgainstUstilaginoidea virens

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