The Potential of a Novel Concept of an Integrated Bio and Chemical Formulate Based on an Entomopathogenic Bacteria, Bacillus thuringiensis, and a Chemical Insecticide to Control Tomato Leafminer, Tuta absoluta ‘(Meyrick)’ (Lepidoptera: Gelechiidae)

Tamer A. Mashtoly (), Hossam S. El-Beltagi (), Abdulrahman N. Almujam and Muteb N. Othman
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Tamer A. Mashtoly: Plant Protection Department, Faculty of Agriculture, Ain Shams University, Cairo 11241, Egypt
Hossam S. El-Beltagi: Agricultural Biotechnology Department, College of Agriculture and Food Sciences, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia
Abdulrahman N. Almujam: National Agriculture & Animal Resources Research Center, Ministry of Environment Waters and Agriculture, Riyadh 14712-7867, Saudi Arabia
Muteb N. Othman: National Agriculture & Animal Resources Research Center, Ministry of Environment Waters and Agriculture, Riyadh 14712-7867, Saudi Arabia

Sustainability, 2022, vol. 14, issue 17, 1-17

Abstract: Tomato leafminer, Tuta absoluta (Meyrick), (Lepidoptera: Gelechiidae), poses severe threats to sustainable tomato production globally with a high capacity to develop resistance to pesticides. Recently, the management programs for this cosmopolitan pest have relied on combinations of chemical insecticides which exacerbate the problems of cross-resistance and adverse environmental effects. A novel concept of integrated formulates through combining a chemical insecticide model of lambda-cyhalothrin with Bacillus thuringiensis ( Bt ) products as the formulation core was explored and evaluated. The susceptibility of the second instar larvae of tomato leafminer to the original formulation of lambda-cyhalothrin, Dipel, XenTari, and Agree products was assessed and compared to the combined formulations. The positive and negative impacts of lambda-cyhalothrin on the viability and pathogenicity of Bt strains were tracked and documented. The physicochemical properties of the combined formulates were examined and compared to the international standards of pesticide formulations. The proposed integrated combined formulates of Dipel, XenTari, and Agree biopesticides with lambda-cyhalothrin showed an enhancing effect and had a higher potential than the originally manufactured formulations alone for about a 3.67–10.08-fold impact on larval mortality. Lambda-cyhalothrin had no significant adverse effect on either the viability of Bt strains or the physicochemical properties of combined co-formulates. Therefore, such integrated combined formulates would have the potential to be involved as an alternative or a complementary approach in pest management and pest resistance management tools for sustainable pest management.

Keywords: biorational insecticides; Bacillus thuringiensis; lambda-cyhalothrin; tomato leafminer; Tuta absoluta; chemical and bio co-formulated; sustainable pest management (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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