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Insecticidal activity of Ageratina adenophora at different developmental stages and its chemical constituent analysis
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Insecticidal activity of Ageratina adenophora at different developmental stages and its chemical constituent analysis
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Journal Article
Insecticidal activity of Ageratina adenophora at different developmental stages and its chemical constituent analysis
2024
Overview
Limax maximus, or great gray slug, is a common agriculture pest. The pest infests crops during their growth phase, creating holes in vegetable leaves, particularly in seedlings and tender leaves. A study was conducted to assess the insecticidal activity of Ageratina adenophora extract against these slugs. Factors such as fecundity, growth, hatching rate, offspring survival rate, protective enzyme activity, and detoxifying enzyme activity were examined in slugs exposed to the extract's sublethal concentration (LC.sub.50) for two different durations (24 and 48 h). The phytochemical variability of the extracts was also studied. The LC.sub.50 value of the A. adenophora extract against L. maximus was 35.9 mg/mL. This extract significantly reduced the hatching rate of eggs and the survival rate of offspring hatched from exposed eggs compared with the control. The lowest rates were observed in those exposed for 48 h. The survival, growth, protective enzyme, and detoxification activity of newly hatched and 40-day-old slugs decreased. The A. adenophora extract contained tannins, flavonoids, and saponins, possibly contributing to their biological effects. These results suggest that the extract could be used as an alternative treatment for slug extermination, effectively controlling this species.
Publisher
Public Library of Science
