Authors: Elliott R
Publish Date: 1955/11/01
Volume: 49, Issue: 6, Pages: 528-542
Abstract
The problem of mosquito breeding in peridomestic water containers is discussed with special reference to conditions in Eastern Nigeria An attempt at control by sealing water pots using local materials which was successful for a time but later frustrated by local social custom is described Various applications of insecticides in solid preparations for the control of similar situations are reviewedExperiments to evaluate the commoner synthetic insecticides are then described DDT dieldrin and BHC were tested against 4thinstar mosquito larvae of two species — A aegypti and C fatigans — in the form of alcoholic solutions aqueous suspensions and aqueous solutionsLD 50 values for the first two states are given and it is concluded that for the preparation of larvicides in solid form the most effective toxicants will be dieldrin and gamma BHC in the form of dieldrin and lindane powdersA series of field trials of various types of insecticidel briquettes and pellets for the control of A aegypti in African water pots is describedTrials of pellets stabilized with plasterofParis show these to be effective over a fair period but unreliable due to disintegration Sand cement pellets are found to be ineffective where DDT is used as the toxicant but highly effective for a year or more when either dieldrin or lindane is used at 16 per cent by weightThe possibility of controlling by similar means larger breeding places such as borrow pits is considered
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