Field Evaluation of New Formulation Types of Essential Oils against Tuta absoluta and their Side Effects on Tomato Plants

Elham Ahmed Sammour¹*, Mohamed Abdel-Hady Kandil², Nahed Fawzy Abdel-Aziz¹, Essam Abd El Maguied Agamy², Ahmed Mohamed El-Bakry¹ and Nasr Mohamed Abdelmaksoud¹

¹Department of Pests and Plant Protection, National Research Centre, Dokki, Egypt
²Economic Entomology and Pesticide Department Faculty of Agriculture, Cairo University, Egypt

*Corresponding Author: Elham Ahmed Sammour, Department of Pests and Plant Protection, National Research Centre, Dokki, Egypt.

Received: April 02, 2018; Published: May 17, 2018

Citation: Elham Ahmed Sammour., et al. “Field Evaluation of New Formulation Types of Essential Oils against Tuta absoluta and their Side Effects on Tomato Plants". Acta Scientific Agriculture 2.6 (2018).

Abstract

  The Physico-chemical properties of four prepared tested formulations, namely Basi (basil oil, Ocimum basilicum), Cura (Turmeric oil, Curcurma longa), Rosa (rosemary oil, Rosmarinus officinalis ) and Thymo (thyme oil, Thymus vulgaris), compared with Nimbecidine commercial insecticide were measured. The efficiency of these formulations was examined against Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) under laboratory and field conditions. The laboratory evaluation of the examined formulations demonstrated that Rosa was the most potent with LC₅₀ value of 0.044%, followed by Thymo, Basi and Cura since the LC₅₀ values were 0.078, 0.126 and 0.192%, respectivel y, compared with 0.064% of Nimbecidine. The most promising formulations Rosa and Thymo were applied in the field. Data showed that, there were no significant variations between the natural prepared formulations and Nimbecidine at all tested durations. The percent reduction of T. absoluta populations were 84.79 and 80.80 of Rosa and Thymo, respectively, compared with 87.37% of Nimbecidine after 7 days of treatment. Concerning the side effects of the tested compounds on tomato plants, antioxidant activities of superoxide dismutase, catalase and polyphenol oxidase enzymes along with total indole acetic acid and total phenol contents had been achieved. The findings elucidated a significant decrease of all the treated examined enzymes compared with untreated plants (control). Also, photosynthetic pigments have been studied. The treatment with the tested formulations caused an increase of chlorophyll contents with time elapsed compared with the control (infested plants).

Keywords: Essential Oils; Formulations; Tuta absoluta; Physico-Chemical Properties; Antioxidant Enzymes

Copyright: © 2018 Elham Ahmed Sammour., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.