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Lethal and sublethal effects of exposure to Roundup 360 Plus for the Chaoborus flavicans larvae (Diptera: Chaoboridae).
- Source :
- Turkish Journal of Zoology; 2023, Vol. 47 Issue 2, p103-110, 8p
- Publication Year :
- 2023
-
Abstract
- The lethal and sublethal effects of Roundup (active substance glyphosate herbicide on phantom midge (Chaoborus flavicans, Meigen, 1830) larvae were checked in the range of concentrations from 20 to 2000 µg/L, in the five-day long tests. The herbicide caused the mortality of insects, with the LC50 values ranging from 357.2 to 120.9 µg of glyphosate/L, for one and five days, respectively. The correlation coefficient >0.9 indicated a strong positive correlation between the concentration of Roundup in water and the mortality of C. flavicans. Also, the LT50 values indicate the toxic activity of the herbicide for the larvae. Also, the reaction to mechanical stimuli was disturbed, in a dose-dependent manner. We also observed the altered vertical migration of midges within the water column. The microscopic observations revealed malformations in insects' morphology and anatomy. Among the most prominent changes were: altered body shape and lower density of chromatophores in air sacs. These changes are in tune with the microscopic observations. We conclude that Roundup 360 Plus herbicide may cause significant changes within C. flavicans populations, especially during long exposure. This, in consequence, may lead to a decline in the population of phantom midges, and next, affect the organisms at the other trophic levels. [ABSTRACT FROM AUTHOR]
- Subjects :
- HERBICIDES
GLYPHOSATE
INSECT morphology
LARVAE
DIPTERA
INSECT mortality
FOOD chains
Subjects
Details
- Language :
- English
- ISSN :
- 13000179
- Volume :
- 47
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Turkish Journal of Zoology
- Publication Type :
- Academic Journal
- Accession number :
- 162663091
- Full Text :
- https://doi.org/10.55730/1300-0179.3120