Effects of white mustard oil on egg

Effects of white mustard oil on egg deposition and on egg
masses viability of Spodoptera littoralis were determined. The
bioactivity of different concentrations of oil emulsion on
moths was assayed in semifield trial. Spraying of 2.5% of the
oil on cotton plants caused reduction in egg laying. The
moths laid only 7% of their egg masses and the percentage of
repellency was 89.4%. The moth longevity was significantly
reduced and the female ones were more affected by the treatment
than males.
At 2.5% conc., egg masses of different ages (24, 48 and 72 h
old) were highly affected and the reductions were 66.6, 45 and
92%, respectively compared to the control.
In general, the older eggs had the higher susceptibility to the
tested concentrations in comparison to newly deposited eggs.