Traps In Field Studies Of Glossina Pallidipes Austen

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Duffy, B.J.
Glasgow, J.P.
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Ford & others (1959) have recently described a version of the fly-round which is an improvement on older methods in that catching procedure is more closely defined, and the results are more amenable to statistical analysis and more easily related to geographical details. Shortcomings in the composition of the fly-round are discussed by Bursell (1961) and an example of its high variability is given by Glasgow (1961a); its chief defect is that it yields so few females that the figures for them are customarily discarded. The study of males alone gives only a partial view of the population dynamics of tsetse flies (e.g., Glasgow & Bursell, 19131) and of their r61e as vectors of pathogens. The fly-round is particularly unsatisfactory in the case of G. paramedics Aust., since of all the species of Glossina of economic importance this is probably the least 'available'. The method of searching for resting flies (Isherwood, 1957; Isherwood & Duffy, 1959a) is a major advance, in that substantial numbers of females are produced. It is, however, expensive, because the yield per man-day is always low; it is very dependent on the skill and zeal of the searcher; and while it can reveal temporal changes in one place it is difficult to use it to compare two different places.
East African Agricultural And Forestry Journal (7), p. 795-814