Timing of oomycete-specific fungicide application impacts the efficacy against fruit rot disease in arecanut

Frontiers in Plant Science

Plant Science

Shankarappa Sridhara¹  Shaban R. M. Sayed²  Hanumappa Narayanaswamy³  Patil Balanagouda³  Vinayaka Hegde⁴  Sandip Shil⁵  R. Thava Prakasa Pandian⁶  Shivaji Hausrao Thube⁷  Rayan Casini⁸ 

[1] Center for Climate Resilient Agriculture, Keladi Shivappa Nayaka University of Agricultural and Horticultural Sciences, Shivamogga, Karnataka, India;Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia;Department of Plant Pathology, Keladi Shivappa Nayaka University of Agricultural and Horticultural Sciences, Shivamogga, Karnataka, India;Division of Crop Protection, ICAR-Central Plantation Crops Research Institute, Kasaragod, Kerala, India;Division of Social Sciences, ICAR-Central Plantation Crops Research Institute, Research Centre, Jalpaiguri, West Bengal, India;ICAR-Central Plantation Crops Research Institute, Regional Station, Vittal, Karnataka, India;ICAR-Central Plantation Crops Research Institute, Regional Station, Vittal, Karnataka, India;ICAR-Central Institute for Cotton Research, Nagpur, Maharashtra, India;School of Public Health, University of California, Berkeley, Berkeley, CA, United States;

关键词: fruit rot disease;    fungicide efficacy;    application timing;    GLMM;    oomycete-specific fungicides;   

DOI  :  10.3389/fpls.2023.1237795

 received in 2023-06-10, accepted in 2023-08-24,  发布年份 2023

来源: Frontiers

【 摘 要 】

Fungicidal application has been the common and prime option to combat fruit rot disease (FRD) of arecanut (Areca catechu L.) under field conditions. However, the existence of virulent pathotypes, rapid spreading ability, and improper time of fungicide application has become a serious challenge. In the present investigation, we assessed the efficacy of oomycete-specific fungicides under two approaches: (i) three fixed timings of fungicidal applications, i.e., pre-, mid-, and post-monsoon periods (EXPT1), and (ii) predefined different fruit stages, i.e., button, marble, and premature stages (EXPT2). Fungicidal efficacy in managing FRD was determined from evaluations of FRD severity, FRD incidence, and cumulative fallen nut rate (CFNR) by employing generalized linear mixed models (GLMMs). In EXPT1, all the tested fungicides reduced FRD disease levels by >65% when applied at pre- or mid-monsoon compared with untreated control, with statistical differences among fungicides and timings of application relative to infection. In EXPT2, the efficacy of fungicides was comparatively reduced when applied at predefined fruit/nut stages, with statistically non-significant differences among tested fungicides and fruit stages. A comprehensive analysis of both experiments recommends that the fungicidal application can be performed before the onset of monsoon for effective management of arecanut FRD. In conclusion, the timing of fungicidal application based on the monsoon period provides better control of FRD of arecanut than an application based on the developmental stages of fruit under field conditions.

【 授权许可】

Unknown   
Copyright © 2023 Balanagouda, Shil, Sridhara, Pandian, Thube, Hegde, Sayed, Casini and Narayanaswamy