First report of Phytophthora palmivora (E. J. Butler) E. J. Butler, 1919 causing fruit rot in Areca triandra Roxb. ex Buch.-Ham. from India

Pandian, R. Sudhakara; Thube, Shivaji Hausrao; Bhavishya,; Merinbabu,; Chaithra,; Santhoshkumar, P.; Nirmalkumar, B. J.; Hegde, Vinayaka

doi:10.1007/s13313-021-00802-3

Cited by 6 publications

(1 citation statement)

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“…A total of 20 symptomatic nuts from 10 different palms were collected, washed under running tap water, cut into small pieces, surface sterilized in 2% NaOCl for 60 s, rinsed in distilled water four times, and air dried. A small piece of infected tissue was placed on carrot agar (CA) plates and incubated at 24 ± 2° C for 6–8 days ( Ribeiro, 1978 ; Pandian et al., 2021 ). Cultural and morphological observations of the isolated pathogen were carried out as per the description given by Balanagouda et al (2022a) .…”

Section: Methodsmentioning

confidence: 99%

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

Balanagouda,

Shil,

Sridhara

et al. 2023

Front. Plant Sci.

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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.

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Section: Methodsmentioning

confidence: 99%