Studies on seasonal dynamics of Lipeurus lawrensis tropicalis Peters (Phthiraptera: Ischnocera) infesting poultry birds

The population indices show constant relation with the rise or fall in temperature, during summer and winter months. Lice index (monthly mean/bird) increased from February-March corresponding the gradual increase in temperature. The peak index is obtained in May-June when there is a sharp increase in temperature. The lower index is seen from September-February, corresponding with the decline in temperature and increase in relative humidity. Zusammenfassung Untersuchungen zur Saisondynamik des Federlings Lipeurus lawrensis tropicalis Pet. (Phthiraptera, Ischnocera) bei Geflugel Die Populations-Indices von L. lawrensis tropicalis zeigten wahrend der Sommer- und Wintermonate konstante Relationen zwischen dem Auftreten des Mallophagen am Geflugel und der Ausentemperatur. Der Spitzenindex wurde — nach starkem Temperaturanstieg — im Mai/Juni erreicht. Der Minimalindex wurde zwischen September und Februar bei niedriger Temperatur aber relativ hoher Luftfeuchtigkeit beobachtet.

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