Persistency of larvicidal effects of plant oil extracts under different storage conditions

The persistency of larvicidal effects of 13 oils (camphor, thyme, amyris, lemon, cedarwood, frankincense, dill, myrtle, juniper, black pepper, verbena, helichrysum, and sandalwood) was examined by storage of 50-ppm solutions under different conditions (open, closed, in the light, and in the dark) fo...

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Bibliographic Details
Published in:Parasitology research (1987) 2006-09, Vol.99 (4), p.473-477
Main Authors: AMER, Abdelkrim, MEHLHORN, Heinz
Format: Article
Language:English
Subjects:
Aedes aegypti
Amyris
Animals
Biological and medical sciences
Culicidae - drug effects
Culicidae - physiology
Drug Stability
Drug Storage - methods
Fundamental and applied biological sciences. Psychology
General aspects
General aspects and techniques. Study of several systematic groups. Models
Helichrysum
Insecticides - chemistry
Insecticides - toxicity
Invertebrates
Larva - drug effects
Larva - physiology
Mosquito Control
Piper nigrum
Plant Oils - chemistry
Plant Oils - toxicity
Thymus
Time Factors
Toxicity Tests
Verbena
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Summary:The persistency of larvicidal effects of 13 oils (camphor, thyme, amyris, lemon, cedarwood, frankincense, dill, myrtle, juniper, black pepper, verbena, helichrysum, and sandalwood) was examined by storage of 50-ppm solutions under different conditions (open, closed, in the light, and in the dark) for 1 month after the preparation of the solutions. The stored solutions were tested against Aedes aegypti larvae for four times during the storage period. Some oils under some conditions stayed effective until the last test, while some solutions had lost their toxicity during a short time after preparation. Thus, the mode of storage is absolutely important for the larvicidal effects. The fresh preparations were always the best.
ISSN:0932-0113
1432-1955
DOI:10.1007/s00436-006-0183-2