First record nanotechnology in agricultural: Silica nano-particles a potential new insecticide for pest control
Journal Title: Applied Science Reports - Year 2013, Vol 4, Issue 3
Abstract
The cotton leaf warm Spodoptera littoralis is considered the major important pest of plenty of vegetables, for causing severe injuries to the plants in all phonological crop stages, beside its rising resistance to several groups of pesticides. The overall objective of this investigation was to look for new control strategy through evaluate the effects of the application of hydrophobic nano-silica on the resistance of tomato plants to this pest. The experiments were carried out under semi field conditions; the experiment was conducted with two treatments, consisting of nano-silica application, and a negative control (distilled water) with five replications. Nano-silica LD50 found to be 212.045 ppm with slope 4.553, it was applied in six doses 100, 150, 200, 250, 300, and 350 ppm of 50 ml/plant, neonates of Spodoptera littoralis were exposed daily to tomato leaves mortality was detected after 15 days post application. The following evaluations were performed: a) Mortality%; b) reproduction and development of the Spodoptera littoralis. Results of treatment of hydrophobic nano-silica in larval test indicated high toxic action at all concentrations used parallel with concentrations. High resistance in tomato plants was found against this insect-pest especially at 300, 350 ppm, respectively. It can be concluded that this is probably the first report that demonstrated that nano-silica could be used in Spodoptera littoralis control.
Authors and Affiliations
H. M El-bendary , A. A El-Helaly
Keywords
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