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

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Abstract

Areca triandra Roxb. ex Buch.-Ham., a wild relative of cultivated arecanut (Areca catechu L.) is known as a resistant source for fruit rot caused by Phytophthora meadii Mc Rae. However, during monsoon 2019–20, a heavy shedding of immature nuts with whitish mycelial growth was observed from A. triandra plantations in Dakshina Kannada district, Karnataka, India. Pure culture of the associated oomycete was isolated from the symptomatic nuts and pathogenicity was confirmed. Based on morphological characteristics and internal transcribed spacer (ITS) sequences the pathogen was identified as P. palmivora E. J. Butler. To the best of our knowledge, this is the first report of Phytophthora palmivora infecting Areca triandra in the world.

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Acknowledgements

Authors thank Indian Council of Agricultural Research, New Delhi for the grant in aid through ICAR-CPCRI Institutional Project and farmers’ for allowing destructive nut sampling.

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Correspondence to R. Thava Prakasa Pandian.

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Pandian, R.T.P., Thube, S.H., Bhavishya et al. First report of Phytophthora palmivora (E. J. Butler) E. J. Butler, 1919 causing fruit rot in Areca triandra Roxb. ex Buch.-Ham. from India. Australasian Plant Pathol. 50, 495–499 (2021). https://doi.org/10.1007/s13313-021-00802-3

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