Evaluation of a Bacillus thuringiensis isolate-based formulation against the pod borer, Helicoverpa armigera Hübner (Lepidoptera: Noctuidae)

Egyptian Journal of Biological Pest Control

article

Bouslama, Thameur¹  Chaieb, Ikbal¹  Rhouma, Ali³  Laarif, Asma¹ 

[1] Regional Research Centre on Horticulture and Organic Agriculture, University of Sousse;National Agricultural Research Institute of Tunisia, University of Carthage;Laboratory of Breeding and Protection of Olive Genetic Resources, Olive Tree Institute

关键词: Helicoverpa armigera;    Bacillus thuringiensis;    Formulation;    Talc;    Carboxylmethyl cellulose;    Biopesticides;   

DOI  :  10.1186/s41938-020-00218-z

学科分类：化学工程（综合）

来源: Springer

【 摘 要 】

The present study focuses on the evaluation of the potential of a Tunisian Bacillus thuringiensis (Bt) isolate named Hr1, isolated from dead and diseased pod borer, Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) larvae under laboratory and field semi-controlled conditions. The bacterial strain Hr1 showed an insecticidal activity against the pest’s neonates in comparison to the spinosad-based insecticide (Tracer 240 SC®) during bioassays under laboratory conditions. A carboxymethyl cellulose-talc (CMC-talc)-based formulation of the Bt isolate was prepared to evaluate the potential of the bacterium on tomato plants infested with H. armigera under semi-controlled field conditions with and without rain simulation. The results showed the efficacy of the formulation than the spinosad-based insecticide and the treatment with unformulated bacterium. The results also showed the persistence of Bt isolate activity even after rain-wash than the treatment with unformulated bacterium.

【 授权许可】

CC BY