Impact of Lambda Cyhalothrin on Bacterial and Fungal Species in Soil
In agricultural plantations, insecticides are frequently employed in integrated pest management. Their use modifies the biochemical and biological processes in the soil that are essential to the health of ecosystems. This study determined the inhibition effect of Lambda cyhalothrin insecticide on...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Bulgarian Soil Science Society
2025-01-01
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| Series: | Bulgarian Journal of Soil Science |
| Subjects: | |
| Online Access: | https://www.bsss.bg/issues/Issue1_2025/BJSS_2025_1_2.pdf |
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| Summary: | In agricultural plantations, insecticides are frequently employed in integrated pest
management. Their use modifies the biochemical and biological processes in the soil that are
essential to the health of ecosystems. This study determined the inhibition effect of Lambda
cyhalothrin insecticide on soil fungal and bacterial species. Soil samples were contaminated
with insecticides for 14 days, and the microbial count, isolation, identification, and
antimicrobial analysis were carried out using standard methods. The control (uncontaminated
soil sample) recorded the highest bacterial count (90.67±0.06×10-6 cfu/g) as well as highest
fungal count (5.11±0.01×10-6 cfu/g) as compared to the Lambda cyhalothrin treated soil
samples which recorded (13.32±0.14×10-6 cfu/g) and (2.31±0.42×10-6 cfu/g) as the bacterial
and fungal load count respectively. The bacteria species from the contaminated soil samples
were identified as Bacillus cereus, Bacillus pumilus, Staphylococcus aureus, Bacillus lentus,
Bacillus megaterium, and Bacillus femulus while the isolated fungi were Aspergillus flavus,
Aspergillus niger, Fusarium chlamidosporium and Fusarium solain. The in vitro antibacterial
activity of the insecticides shows a considerable level of inhibition. Lambda cyhalothrin at
2.0ml had the highest activity against Bacillus megaterium (24.15±0.22 mm) and the least
against Bacillus femulus (14.96±0.07mm). Lambda cyhalothrin shows significant inhibition
of fungal growth. 5.0ml of the insecticide on Day 3, recorded the highest % inhibition of
fungal growth, with Lambda cyhalothrin recording (58.61%) against Fusarium
chlamidosporium and least % inhibition was recorded against Fusarium solain with Lambda
cyhalothrin (33.98%). The bacterial and fungal communities in the soil exhibits changes in
growth and development as a result of insecticide applications. |
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| ISSN: | 2534-8787 2367-9212 |