ArticleMalaria journal2026
Ovicidal and larvicidal activity of the Impatiens rothii and Salvia officinalis extracts against Anopheles stephensi (Culicidae: Diptera) in laboratory conditions.
Article in Malaria journal, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundMalaria vector control with synthetic insecticides can cause resistance, environmental toxicity, and harm to non-target animal species. To address these issues, it is critical to investigate safe and environmentally friendly botanical extraction methods for mosquito control. This study investigates the effects of crude root solvent extracts from Impatiens rothii and Salvia officinalis on Anopheles stephensi eggs and larvae under controlled environments.
methodsFresh roots of S. officinalis and I. rothii were collected separately, allowed to air dry, ground into a powder, and then sieved. The test plant powders were soaked in ethanol and chloroform solvent, and the extracted product was concentrated, forming a desired concentration solution for testing. Aquatain (AMF) was used as the standard control, while 3% of 20 Tween was used as the negative control. Larval mortality was measured after a 24 hours recovery period in each treatment group, and the hatchability of eggs was monitored after 48 hours. Statistical analyses were conducted using R Studio to check normality and identify significant differences between groups, then followed by SPSS, ANOVA to compare extract to standard group and probit regressions for LC
resultsThere were significant differences (P < 0.05) in ovicidal and larvicidal activities between the treatment, negative, and standard control groups. Both the chloroform extract of S. officinalis (LC
conclusionThe study suggests that root extracts of I. rothii and S. officinalis can be a safe and effective alternative to synthetic mosquitocidal for controlling An. stephensi, suggesting early-stage mosquito control is more efficient than adult control. Further research is required to understand the essential ingredients, their mechanisms of action, efficacy, and safety in larger-scale applications.
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