Passion Fruit and Naranjilla as Hosts for Soybean Nematodes

Abstract

A greenhouse study was conducted to assess the susceptibility of yellow passion fruit (Passiflora edulis f. flavicarpa) and naranjilla (Solanum quitoense) to attack by soybean (Glycine max) nematodes. Six-week-old seedlings were transplanted into one-liter-capacity pots that contained a 50:50 (v ?cdot v) mixture of fine sand and a sandy loam soil from a soybean field. The soil was infested with cyst (Heterodera glycines), lesion (Pratylenchus brachyurus), stubby root (Paratrichodorus christiei), and root-knot (Meloidogyne arenaria) nematodes. There were also pots planted each with five 'Davis' soybean seeds. H. glycines developed only in pots with soybean. Roots of all plants were galled by M. arenaria, with soybean having the highest number of galls per root system. No Meloidogyne juveniles were recovered from passion fruit roots in contrast with naranjilla or soybean roots. Passion fruit roots were free of lesion nematodes but those of the other two plant species contained signific