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Effectiveness of Bacillus thuringiensis (Shigetane) Commercial Products against the tomato leaf miner, Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae)
Burçin Çiçek1 , Mahmut mete Karaca1 , Kamil Karut * 2
1- Cukurova University, Faculty of Agriculture, Department of Plant Protection
2- Cukurova University, Faculty of Agriculture, Department of Plant Protection, , karuti@cu.edu.tr
Abstract:   (110 Views)
The tomato leaf miner, Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae), is one of the most important pests causing significant economic losses in plant species belongingthe Solanaceae family. The preferred management method for T. absoluta currently involves insecticide application. However, beside the undesired effects of insecticides, chemical treatments can also negatively impact the efficiency of integrated pest management programs (IPM). Bacillus thuringiensis (Shigetane 1902) (Bacillales: Bacillaceae) (Bt) is a pathogen with formulations used as host-specific bioinsecticides. These formulations decompose quickly in the environment, thereby reducing non-target effects and residue problems compared to chemical pesticides. In this study, the effectiveness of six commercial Bt products, belonging to aizawai and kurstaki strains, against T. absoluta was assessed under laboratory conditions, using manufacturer-recommended doses. The efficacy of the Bt products varied between 70 and 97.5%. The lowest and highest mortalities were recorded in B. thuringiensis var. aizawai and B. thuringiensis var. kurstaki products, respectively. Mortality reached 100% within three days following insecticide treatments, whereas peak mortality in Bt applications was noted after a post-treatment period of fifteen days. These findings highlight the potential of certain Bt products as effective components of IPM programs for T. absoluta, suggesting the need for further field studies to optimize their use in agricultural practices.

 
Keywords: Bacillus thuringiensis, development time, tomato, mortality, Tuta absoluta
Full-Text [PDF 314 kb]   (88 Downloads)    
Article Type: Original Research | Subject: Toxicology and Physiology
Received: 2024/01/18 | Accepted: 2024/01/1
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