The Study On Bionomics Of Orgyia Ericae Germar And Its Nucler Polyhedrosis Virus

Orgyia ericae Germar harms plants in sand regions of western Inner Mongolia, in Etuokqi. The infection of O. ericae Germar by NPV prevailed naturally in forest, NPV is one of the primary factors on O. ericae Germar population dynamics.Taking systemic observations on bionomics of O. ericae Germar which were reared in laboratory, O. ericae Germar has two generations per year and over winter at egg stage in cocoon. Eggs hatched gradually in early May. The first generational larvae began to pupate from middle June to middle July. The moths emerged in early July. The second generational larvae hatched in middle July and moths emerged in middle September. Female has no wing and mates with male in cocoon.Bioassay of the OeNPV from 0. Germar was done in lab. Five different concentrations were used on the 3rd instars to test OeNPV effect. The data was analyzed using SPSS. The regression equation of mortality and probality value were gotten. The LC50, LC70, LC90 were 1.29×105 PIB/ml, 2.83×106 PIB/ml, 2.57×108 PIB/ml respectively. The sensitivity of different instars to OeNPV was tested. The smaller the larva is ,the more sensitive it is.