| Sumario: | The yield response of four popular banana cultivars from southeast Asia to infection with a population of Radopholus similis collected from banana in Davao, Philippines, was investigated in a microplot experiment. Bunch weight reduction of nematode-infected plants ranged from 25 to 68% for all four southeast Asian banana cultivars and Grand Nain (AAA), the susceptible reference cultivar included in the study. The banana cv. Latundan (AAB) had a nematode population density of 185, 38 and 27 nematodes at 6 months after planting, flowering and harvesting, respectively, and a low bunch weight reduction (25%) compared with the other banana cultivars examined, possibly suggesting that this cultivar is partially resistant to R. similis.
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