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Plant-Parasitic Nematodes Associated with Breadfruit, Artocarpus altilis (Parkinson) Fosberg.

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Title:Plant-Parasitic Nematodes Associated with Breadfruit, Artocarpus altilis (Parkinson) Fosberg.
Authors:Lau, Teri J.-W.
Contributors:Tropical Plant Pathology (department)
Date Issued:Dec 2017
Publisher:University of Hawaiʻi at Mānoa
Abstract:A survey of plant-parasitic nematodes associated with breadfruit in Hawai‘i was conducted
on 25 sites with breadfruit trees. Soil and breadfruit roots yielded seven genera of plant-parasitic
nematodes (Helicotylenchus, Meloidogyne, Mesocriconema, Paratylenchus, Pratylenchus,
Rotylenchulus, Tylenchorhynchus) and one Heteroderid. Morphometric and molecular techniques
identified a root-lesion nematode found parasitizing breadfruit as Pratylenchus coffeae. Host
ranges and pathogenicity of Meloidogyne javanica, Pratylenchus coffeae, and Rotylenchulus
reniformis were tested on breadfruit cultivar ‘Ma‘afala’ in two experiments. In experiment 1, P.
coffeae reproduced 17-fold, while M. javanica and R. reniformis did not replace the inoculum
concentration. At termination, no visible symptoms were present on host plants, but a greater root
weight of breadfruit inoculated with P. coffeae was measured. Experiment 2 showed similar trends
despite higher greenhouse temperatures and pot-bound breadfruit trees. Reproductive factor results
indicate breadfruit is a good host to P. coffeae and a poor host to M. javanica and R. reniformis.
Key Words: Hawaii, Helicotylenchus dihystera, host range, identification, Kauaʻi, Ma‘afala,
Maui, Meloidogyne javanica, lesion, Ma‘afala, molecular, morphometric, morphology, Oʻahu,
Paratylenchus, pathogenicity test, Pratylenchus coffeae, Rotylenchulus reniformis, survey, ‘ulu.
Description:M.S. Thesis. University of Hawaiʻi at Mānoa 2017.
Rights:All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections: M.S. - Tropical Plant Pathology

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