Toxicity of a biopesticide abamectin, a botanical biosal (Neem Extract) in comparison to a synthetic parathyroid lambda cyhalothrin against cotton leafhopper amrasca devastans (Distant) (HOMOPTERA:CICADILIDAE), a sucking pest of cotton and vegetables | [International Journal of Biology and Biotechnology • 2024]

Author(s):

1. Muhammad Tanweer Ahsan: Department of Zoology, Government Islamia Science College,Karachi,Pakistan

Abstract:

Toxicity of a bacterial product abamectin, a plant extract biosal and a synthetic pyrethroid lambda cyhalothrin was determined and compared by topical method. The insects were exposed at five different dozes of pesticides for 24 hours. The LC50 value was calculated by log-probit graph paper. The range of mean % mortality and P-values were determined statistically at 95% CI. The mortality was 20.0% ± 2.88, 31.3% ± 1.84, 58.0% ± 3.27, 77.0% ± 1.84, and 94.0% ± 2.0 at 0.0123 µg/cm2, 0.02456, 0.0489, 0.0982 and 0.1964 µg/cm2, respectively and the calculated LC50 was found to be 0.04 µg/cm . The percent 2 mortality was found to be 28.0% ± 2.0, 50. % ± 3.16, 62.0% ± 2.0, 72.0% ± 3.74, and 92.0% ± 2.0 at 78.77 µg/cm2, 118.14, 157.54, 196.91 and 236.0 µg/cm2, respectively and the calculated LC50 was 120.0 µg/cm2. The mortality by cyhalothrin was 15.0% ± 0.54, 31.1% ± 2.88, 58.42% ± 2.75, 78.3% ± 3.51, and 94.0% ± 4.0 at 0.04195µg/cm2, 0.0982, 0.1964 , 0.3928 and 0.7856 µg/cm2, respectively against the adults of A. devastans and the LC50 was calculated to be 0.16 µg/cm2. The bacterial extract found to be more toxic as compared to synthetic pyrethroid and plant extract.

Page(s): 215-220

DOI: DOI not available

Published: Journal: International Journal of Biology and Biotechnology, Volume: 21, Issue: 2, Year: 2024

Keywords:

Toxicity , LC50 , Biopesticide , pyrethroid , Botanical extract , leafhopper , Sucking pest

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