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 | Studies on the Insecticidal and Repellent Properties of the Seed Extract of Tephrosia Purpurea LINN Pers
Author : Saxena, B.N.;Dubey, D.N.;Nair, A.L.
Source : Defence Science Journal ; Vol:24(2) ; 1974 ; pp 43-48
Subject : 615 Pharmacology
Keywords : Land leeches;Simulium flies;Mosquitoes
Abstract : Laboratory and field trials were conducted to find out the insecticidal and repellent properties of petroleum ether extract of the seeds of Tephrosia purpurea. In laboratory trials contact toxicity of the extract was assessed against land leeches, houseflies, mosquitoes, rice weevil and flour beetle. In field trials, the repellency of the extract was assessed against land leeches, mosquitoes and simulium flies. In laboratory trials, the dosage required for 100 per cent mortality was 0.0005 gm/cm/sup 2/ for land leeches, 0.0157 gm/cm/sup 2/ for flour beetle. In field trials, the extract was found to be repellent against land leeches for 5 hours, mosquitoes for 4 hours and simulium flies for 5 hours. |
| | Bio repellents for land leeches
Author : Nath, D.R. ;Das, N.G. ;Das, S.C.
Source : Defence Science Journal ; Vol:52(1) ; 2002 ; pp 73-76
Subject : 57.089 Biomedical Sciences ;57 Biological Sciences
Keywords : Synthetic repellent ;Repellant ;Land leeches ;Timur oil
Abstract : Oils of Callistemon rigidus (bottle brush), Zanthoxylum armatum, DC. syn. Zanthoxylum alatum Roxb (timur), Azadirachta indica (neem) and synthetic repellent N, N-diethyl-meta-toluamide (DEET) and dimethyl phthalate (DMP) were evaluated for leech repellency properties and persistance on cloth. In statistical analysis, bio-repellents were found at par with DMP. Bottle brush oil afforded better protection against land leeches than timur oil, neem oil and synthetic repellent DMP at all the three concentrations evaluated. However, DEET was found superior to all the repellents evaluated and remained effective for 19.8 days at 0.93 mg/cm2 followed by 7 days and 6.3 days at 0.56 mg/cm2 and 0.37 mg/cm2 treatment, respectively, while bottle brush oil was found effective for 13 days at 0.93 mg/cm |
| | Efficacy of Certain Essential Oils and Insect Repellents Against Land Leeches
Author : Nath, D.R.;Das, N.G.;Malhotra, P.R.
Source : Defence Science Journal ; Vol:36(3) ; 1986 ; pp 327-330
Subject : 632.9 Pest Control;57 Biological Sciences
Keywords : Mylol;DMP ;Repellants;Land Leeches
Abstract : Relative efficacy of six essential oils, viz., Cinnamon, Citronella, Eucalyptus, Orange, Pine, Spearmint and four insect repellents i.e. Dimethyl phthalate (DMP), Expel and Mylol was investigated against landleeches, Haemadipsa zeylanica montivindicis Moore, under laboratory conditions. Cinnamon oil was found to be the best among the essential oils and out of repellents, Mylol and DMP effective equally. |
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