 | Mosquitoes |
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 | Studies on contact toxicity Part IV
Author : Cheema, P.S. ;Misra, J.N. ;Paul, R.K. ;Ranganathan, S.K.
Source : Defence Science Journal ; Vol:9(3) ; 1959 ; pp 222-232
Subject : 632.9 Pest Control
Keywords : Toxicity ;DDT ;Glue ;Potassium ;Dichromates ;Mosquitoes ;Flies
Abstract : The use of starch and a mixture of glue and potassium dichromate as pretreatment for the enhancement of the residual activity of DDT has been investigated using mosquitoes, Cluex fatigans Weid. and flies, Musca nebulo Linn. The DDT deposits were derived either from an emulsifiable concentrate or a water dispersible powder concentrate. As substrate, cement, brick and mud surfaces were investigated both as they were in the lime-washed conditions. Pretreatment with glue-dichromate considerably enhanced the residual activity of DDT against both the species of insects on all the three surfaces and proved very much superior to pretreatment with starch. The deposits derived from DDT emulsion showed residual activity for a longer period than those derived from DDT water dispersible powder on mud surfaces pretreated with glue-dichromate. |
| | Efficiency of Newer Insecticide DDVP as a Space Spray
Author : Agarwal, P.N. ;Dixit, R.S.;Srivastava, A.P.
Source : Defence Science Journal ; Vol:15(3) ; 1965 ; pp 221-224
Subject : 632.9 Pest Control
Keywords : Mosquitoes ;Culex;Pyrethrins
Abstract : The insecticide properties of DDVP in relation to pyrethrins was investigated as space spray against the houseflies, Musca nebulo linn. and the mosquitoes, culex fatigans wied. DDVP was found much superior to pyrethrins in its killing properties. The knockdown property of DDVP as compared to pyrethrins was poor especially against the mosquitoes. |
| | 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. |
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