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 Australasian Plant Disease Notes
Disease notes, new records and quarantine interception reports are published in Australasian Plant Disease Notes.

 

Article << Previous     |     Next >>   Contents Vol 34(3)

Screening of Musa cultivars for resistance to Helicotylenchus multicinctus, Meloidogyne incognita, Pratylenchus coffeae and Radopholus similis

T. Moens A, M. Araya B, R. Swennen C, D. De Waele C D

A International Network for the Improvement of Banana and Plantain (INIBAP) p/o CATIE-INIBAP, 7170 Turrialba, Costa Rica.
B Corporación Bananera Nacional (CORBANA) Apartado Postal 370, 7210 GuÔpiles, Costa Rica.
C Laboratory of Tropical Crop Improvement, Catholic University of Leuven (K.U. Leuven) Kasteelpark Arenberg 13, 3001 Leuven, Belgium.
D Corresponding author. Email: dirk.dewaele@agr.kuleuven.ac.be
 
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Abstract

The host response of 31 Musa cultivars to Helicotylenchus multicinctus, Meloidogyne incognita, Pratylenchus coffeae and/or Radopholus similis was tested in pots under greenhouse conditions. The Musa cultivars examined belong to the AA, AB, AAA, AAB, ABB, AAAA, AAAB, AABB and balbisiana genomic groups. This is the first time that the host response of Musa cultivars to H. multicinctus has been evaluated in pots. Resistance to this nematode was found in Tjau Lagada (AA) which supported significantly lower nematode numbers per unit root and per plant than Grande Naine (AAA), the susceptible reference cultivar. Yangambi km5 was less susceptible to H. multicinctus. In all the other cultivars tested, the final H. multicinctus numbers per plant were higher than the initial nematode inoculum. For M. incognita, the differences in final nematode numbers reflected differences in susceptibility but no resistance was found. The resistance of Yangambi km5 (AAA) to P. coffeae was confirmed. Also the roots of Tjau Lagada, Pisang Bungai and Pisang Mas (AA) supported significantly lower nematode numbers per unit root and per plant than Grande Naine. In contrast, all FHIA hybrids were equally susceptible to P. coffeae as Grande Naine. Tjau Lagada, Kunnan (AB), Paka (AA) and Pisang Lemak Manis (AA) did not differ significantly in resistance to R. similis from Yangambi km5, the reference resistant cultivar. Also Pisang Ceylan (AAB) seems to be resistant to this nematode.

   
    


 
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