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Botanical biopesticides are alternative to hazardous synthetic insecticides. In the present study neem oil based nanoemulsion was synthesized using neem oil and tween 80. The particle size was estimated as 159.2 nm. The emulsion was characterized using particle size analyzer and TEM to confirm the formation of nano emulsion of neem oil. Trichogramma chilonis (Ishii) is an effective egg parasitoid of lepidopterous pests. It controls pests in eggs stage prior to its damaging to crops. The parasitoid is vulnerable to insecticides or oil sprays applied to the crops. The present study revealed the effects of neem nanoemulsion with T. chilonis under the controlled laboratory conditions.

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SiO2 is an excellent support material due to its flexible pore size and can be used as an adsorbent for the removal of toxic materials from water. Nanocrystalline TiO2-rGO is previously reported to show complete photodegradation for azo dyes. In pursuit of enhancing the adsorption capability of the system, we have incorporated SiO2 in TiO2-rGO nanocomposite which has drastically reduced the crystallinity of the matrix. Analysis of the bandgap variations is pursued here, which is crucial for enhanced light absorption and high performance photocatalysis.