Universität zu Köln

Kajla, Mithilesh, Bhattacharya, Kurchi, Gupta, Kuldeep, Banerjee, Ujjwal, Kakani, Parik, Gupta, Lalita and Kumar, Sanjeev (2016). Identification of the Temperature Induced Larvicidal Efficacy of Agave angustifolia against Aedes, Culex, and Anopheles Larvae. Front. Public Health, 3. LAUSANNE: FRONTIERS MEDIA SA. ISSN 2296-2565

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Abstract

Synthetic insecticides are generally employed to control the mosquito population. However, their injudicious over usage and non-biodegradability are associated with many adverse effects on the environment and mosquitoes. The application of environment-friendly mosquitocidals might be an alternate to overcome these issues. In this study, we found that organic or aqueous extracts of Agave angustifolia leaves exhibited a strong larvicidal activity (LD50 28.27 mu g/ml) against Aedes aegypti, Culex quinquefasciatus, and Anopheles stephensi larvae within a short exposure of 12 h. The larvicidal activity of A. angustifolia is inherited and independent of the plants vegetative growth. Interestingly, the plant larvicidal activity was observed exclusively during the summer season (April-August, when outside temperature is between 30 and 50 degrees C) and it was significantly reduced during winter season (December-February, when the outside temperature falls to similar to 4 degrees C or lower). Thus, we hypothesized that the larvicidal components of A. angustifolia might be induced by the manipulation of environmental temperature and should be resistant to the hot conditions. We found that the larvicidal activity of A. angustifolia was induced when plants were maintained at 37 degrees C in a semi-natural environment against the controls that were growing outside in cold weather. Pre-incubation of A. angustifolia extract at 100 degrees C for 1 h killed 60% larvae in 12 h, which gradually increased to 100% mortality after 24 h. In addition, the dry powder formulation of A. angustifolia, also displayed a strong larvicidal activity after a long shelf life. Together, these findings revealed that A. angustifolia is an excellent source of temperature induced bioactive metabolites that may assist the preparedness for vector control programs competently.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kajla, Mithilesh UNSPECIFIED UNSPECIFIED UNSPECIFIED Bhattacharya, Kurchi UNSPECIFIED UNSPECIFIED UNSPECIFIED Gupta, Kuldeep UNSPECIFIED UNSPECIFIED UNSPECIFIED Banerjee, Ujjwal UNSPECIFIED UNSPECIFIED UNSPECIFIED Kakani, Parik UNSPECIFIED UNSPECIFIED UNSPECIFIED Gupta, Lalita UNSPECIFIED UNSPECIFIED UNSPECIFIED Kumar, Sanjeev UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-287330
DOI:	10.3389/fpubh.2015.00286
Journal or Publication Title:	Front. Public Health
Volume:	3
Date:	2016
Publisher:	FRONTIERS MEDIA SA
Place of Publication:	LAUSANNE
ISSN:	2296-2565
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LEAF EXTRACT; MOSQUITO; QUINQUEFASCIATUS; DIPTERA; PLANT; STEPHENSI; AGAVACEAE; L. Multiple languages Public, Environmental & Occupational Health Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/28733