Abstract：
:We studied breeding sites of Phlebotomus orientalis (Diptera: Psychodidae) the vector of visceral leishmaniasis in northern Ethiopia. Although numbers were rather small, 165 sand flies were captured emerging from vertisol cracks. The most productive breeding sites were cracked vertisols, dry river banks and close to trees. No sand flies were caught emerging from sandy clay loam soils in peri-domestic habitats but a few were captured emerging from gaps in a stone wall. Abiotic parameters in vertisols close to trees and in open field from which P. orientalis had emerged, were compared. Soil pH was slightly alkaline and salinity was low. Organic matter contents were similar in both sites. Temperatures and RH remained relatively stable near trees from the end of the rainy season through mid dry season, yet fluctuated markedly at the shallower depth in the open field. During the rainy season, cracks in the soil were sealed resulting in significant lowering of the oxygen concentrations near the tree. Gravimetric water content of soil near trees was lower than open field at shallow depth but similar deeper down. We conclude that ambient conditions suitable for sand fly larvae at shallow depths (45cm) are restricted to areas close to trees. However, deeper in vertisols (90cm) suitable conditions are apparently maintained throughout the dry season even in open fallow fields.
journal_name
Acta Tropjournal_title
Acta tropicaauthors
Moncaz A,Kirstein O,Gebresellassie A,Lemma W,Yared S,Gebre-Michael T,Hailu A,Shenker M,Warburg Adoi
10.1016/j.actatropica.2014.06.013subject
Has Abstractpub_date
2014-11-01 00:00:00pages
5-14eissn
0001-706Xissn
1873-6254pii
S0001-706X(14)00218-6journal_volume
139pub_type
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