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The persistence of infectivity of conidia of Entomophthora obscura at different temperatures on the surface of an unsterilised soil


  • LATTEUR, G. (1980). The persistence of infectivity of conidia of Entomophthora obscura at different temperatures on the surface of an unsterilised soil. Acta Oecologica, Oecologia Applicata, 1: (1),
Type Journal Article
Year 1980
Title The persistence of infectivity of conidia of Entomophthora obscura at different temperatures on the surface of an unsterilised soil
Journal Acta Oecologica, Oecologia Applicata
Recnumber 170
Volume 1
Issue 1
Endnote Keywords infectivity|soil|persistence|entomopathogens|pathogens|agricultural entomology|Entomophthora obscura|
Abstract Laboratory studies were carried out in Belgium on the persistence of infectivity of conidia of Entomophthora obscura for Acyrthosiphon pisum (Harris) on the surface of soil that was unsterilised but free from infective forms of Entomophthora spp., at 20, 10 and 5 deg C. At 20 deg C, the inoculum was still active after 12 days, but the mortality of aphids under these conditions was low. At 10 deg C, infectivity remained high after 12 days of storage but subsequently diminished rapidly. The duration of infectivity of conidia was distinctly prolonged at 5 deg C, and even after 60 days, 75% mortality of aphids was observed. Complementary observations suggested that the duration of infectivity of primary conidia depended on their ability to produce secondary and tertiary conidia.
Notes Cited Reference Count: 5 ref. Journal article English 2 fig.
Author address Station de Zoologie appliquee de l'Etat, 8, chemin de Liroux, B-5800 Gembloux, Belgium.
Fichier
Lien ://19800578808
Authors LATTEUR, G.