Aircraft applications of insecticides in East Africa. XIX. A comparison of two sampling techniques for assessing the effectiveness of pyrethrum applications on Glossina pallidipes Aust.

Publisher： Cambridge University Press

E-ISSN： 1475-2670|60|2|221-223

ISSN： 0007-4853

Source： Bulletin of Entomological Research, Vol.60, Iss.2, 1970-12, pp. : 221-223

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Abstract

An experiment was carried out in 1968 in the Lossitete Forest area of northern Tanzania to compare the fly-round and the Langridge-trap as sampling techniques for assessing the effectiveness of 0·4% pyrethrum applications on Glossina pallidipes Aust. when applied from the air. From fly-rounds, population reductions of 64%, 36% and 29% after the first, second and third applications, respectively, were estimated, whereas from Langridge traps the reductions were 11%, 7% and nil, respectively. Taking into consideration the efficiency of the Langridge-trap and the limitations of the fly-round in sampling G. pallidipes populations, it is concluded that the fly-round may give a false assessment of reduction of G. pallidipes after insecticide application.

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