Measures for avoidance and extermination of flies, mosquitoes, lice and other vermin / by H. Maxwell-Lefroy.

  • Harold Maxwell-Lefroy
Date:
1916
Catalogue details

Licence: Public Domain Mark

Credit: Measures for avoidance and extermination of flies, mosquitoes, lice and other vermin / by H. Maxwell-Lefroy. Source: Wellcome Collection.

    12/26 page 6
    or neutral blast furnace oil is mixed at the rate of % gallon to 40 gallons of earth or sand and the mixture spread over the manure heap one inch deep, i.e., 40 gallons mixture to 80 square feet of surface. Manure so treated is immune from fly-breeding and, if already infected, is rendered un¬ suitable to the further development of the maggots. If it is a question of dealing with manure containing no straw or litter, the oil alone may be used watered on very lightly, i.e., 1 gallon to 80 to 100 square feet of surface. Crude mineral oil does not give such good results. Where any form of crude tar or creosote oil is available, the method is cheap and simple. Where space is available, simply spreading manure out on the soil in a layer four to six inches deep prevents fly¬ breeding except in warm wet weather. If the dung heap can be spread out and dried every few days the breeding of flies will be prevented. Flies cannot breed in dry surroundings. 2. A manure heap can be used as a fly-trap if kept slightly moist, and encircled, to a distance of about twelve inches, by a ring of dry straw or other material for the maggots to crawl into when they are full-grown; the brown u chrysalides ” must be swept up with the straw and burnt every four days, to prevent the oldest emerging as flies. At large cavalry and remount depots the accumulation of stable manure has been so large ’and continual that spe¬ cial methods have had to be devised. On the manure stacks, spots where flies congregate are marked with sticks and at evening the manure at these spots is taken out and burnt or treated, as it contains immense accumulations of eggs. Tins filled with dry chaff and with slits cut in the sides are sunk flush in the manure at selected spots and immense quantities of maggots go into these to pupate : the maggots that collect at the lower edges of the stack to pupate are destroyed by watering with a cresol-soap solution or other insecticides. These are special methods which have to be devised to
    digitised image 1
    digitised image 2
    digitised image 3