A comparative study of the reproductive fitness and pathogenicity of a population of Radopholus similis from Davao, Philippines, on banana (Musa spp.)

Issue Date

2-2013

Abstract

The in vitro reproductive fitness on carrot discs and the in vivo pathogenicity on selected FHIA (Fundación Hondureña de Investigaciónes Agrícola) banana hybrids of a population of Radopholus similis isolated from banana in Davao, Philippines, were investigated at the Bureau of Plant Industry, Davao City, Philippines. It was shown that on carrot discs following inoculation with 25 females, the Davao population had the highest population density and multiplication rate compared with two other R. similis populations from the Philippines (Los Baños and Quezon) and two exotic populations of R. similis (from Uganda and Indonesia). According to the Gompertz model, the Davao population also had a short lag phase and a high maximum specific growth. Following inoculation with one single female, the Davao population also had the highest multiplication rate and the highest proportion of juveniles and females compared with the other four populations included in the experiments. Nine weeks after inoculation with 1000 vermiforms, the R. similis population from Davao had reduced the plant height of the FHIA hybrids included in the experiment (FHIA-3, FHIA-4, FHIA-5, FHIA-18 and FHIA-23) on average by 37%, plant girth by 5.3-40.9%, shoot weight by 20.1-65.8% and root weight by 31.7-69.7%, indicating the high pathogenicity of this population on banana. FHIA-4 was tolerant to R. similis infection. © 2013 Copyright Taylor and Francis Group, LLC.

Source or Periodical Title

Archives of Phytopathology and Plant Protection

ISSN

0323-5408

Volume

46

Issue

4

Page

410-422

Document Type

Article

Physical Description

tables

Language

English

Subject

burrowing nematode, carrot discs, damage, FHIA banana hybrids, pot experiments, reproduction

Identifier

doi:10.1080/03235408.2012.742984.

Digital Copy

yes

Link to Full Text

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