MODELLING OF THE IN VITRO EFFECT OF CADUSAFOS ON MELOIDOGYNE INCOGNITA

Authors

  • N. Sasanelli
  • T. D'Addabbo

Abstract

The nematicidal effect of cadusafos on eggs of Meloidogyne incognita was tested in two in vitro experiments. Final hatch was significantly reduced by four weeks incubation at concentrations =20 mg/ml. A 15 µg/ml diluition x 768 hour incubation periods was required to obtain a 90% mortality. The linear relationship between log time of exposure to different concentration and probit hatchability, fitted to the observed final hatch percentages, was: probit h=b[subC][subr]-mlog[sub1][sub0]t[subC]d[sup(][supC][suprû[supC][sup)]. Cr is a reference concentration and for Cr=25 µg/ml, b[subC][subr]=10.82, m=2.3 and d=0.9528. On a log scale, the above relationship is estimated by the general equation log[sub1][sub0]h=b'-m[subC][subr]td[sup(][supC][suprû[supC][sup)], with b'=2.1377, and m[subC][subr]=0.0013.

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Published

1999-06-15

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Section

Articles