Effect of Entomopathogenic Nematodes on Mesocriconema xenoplax Populations in Peach and Pecan

A. P. Nyczepir, D. I. Shapiro-Ilan, E. E. Lewis, Z. A. Handoo


The effect of Steinernema riobrave and Heterorhabditis bacteriophora on population density of Mesocriconema xenoplax in peach was studied in the greenhouse. Twenty-one days after adding 112 M. xenoplax adults and juveniles/1,500 cm³ soil to the soil surface of each pot, 50 infective juveniles/cm² soil surface of either S. riobrave or H. bacteriophora were applied. Another entomopathogenic nematode application of the same density was administered 3 months later. The experiment was repeated once. Mesocriconema xenoplax populations were not suppressed (P = 0.05) in the presence of either S. riobrave or H. bacteriophora 180 days following ring nematode inoculation. On pecan, 200 S. riobrave infective-stage juveniles/cm² were applied to the soil surface of 2-year-old established M. xenoplax populations in field microplots. Additional applications of S. riobrave were administered 2 and 4 months later. This study was terminated 150 days following the initial application of S. riobrave. Populations of M. xenoplax were not suppressed in the presence of S. riobrave.


biological control; carya illinoensis; entomopathogenic nematodes; heterorhabditis bacteriophora; mesocriconema xenoplax; nematode; peach; prunus persica; ring nematode; steinernema riobrave

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