CONTROL OF CITRUS NEMATODE, TYLENCHULUS SEMIPENETRANS, WITH CADUSAFOS

Granular (Rugby 10G) and liquid (Rugby 100 ME) formulations of cadusaf os were evaluated for the control of Tylenchulus semipenetrans on matu re lemon trees in a commercial citrus orchard at Yuma, Arizona. Three applications of cadusafos, with 2 months between applications, at the rate of 2 g a.i./m(2) reduced nematode populations to undetectable lev els and increased the yield and rate of fruit maturity of 'Rosenberger ' lemons. Yields were increased 12,587 kg/ha with Rugby 100ME and 8,39 2 kg/ha with Rugby 10G. Nematode populations were suppressed for at le ast 12 months after the last application.