Keywords
LD50
imidacloprid
chlorpyrifos
How to Cite
Abstract
The use of synthetic pesticides and their negative effects have driven the development of alternatives based on natural extracts with insecticidal activity. However, information on their impact on beneficial insects is limited. Therefore, the objective of this study was to evaluate the toxicity of the aqueous extract of Solanum elaeagnifolium (Cav., 1794), imidacloprid, and chlorpyrifos on adult Chrysoperla carnea s. lat., under laboratory conditions. The results showed that chlorpyrifos had the greatest insecticidal effect, with an LD50 of 19.6 ppm. In contrast, the S. elaeagnifolium extract and imidacloprid showed intermediate to low effects, with LD50 of 814.3 and 895.9 ppm, respectively. The recorded mortality rates were: control group 0%, botanical extract 3.33–4.43%, imidacloprid 15.56–44.43%, and chlorpyrifos 17.73–100%. These results suggest that the S. elaeagnifolium extract, applied at moderate doses, may be more compatible with the evaluated natural enemy compared to the synthetic insecticides, which would facilitate its integration into integrated pest management programs. However, further studies are needed to determine its potential for pest control.
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