A commentary on the mathematical model of the heterogeneous gypsy moth larva population by G. Dwyer and his co-authors

Foliage Damage Does Not Affect within-Season Transmission of an Insect Virus

Gypsy moth defoliation of oak trees has been shown to lead to increased tannin levels, which, in turn, lead to reduced gypsy moth growth and fecundity. In laboratory experiments, increased tannin levels can interfere with the transmission of a virus that is consumed by larvae on oak foliage, and high mortality rates of larvae in the field are sometimes associated with low levels of defoliation....

Using Simple Models to Predict Virus Epizootics in Gypsy Moth Populations

Host heterogeneity in susceptibility and disease dynamics: tests of a mathematical model.

Most mathematical models of disease assume that transmission is linearly dependent on the densities of host and pathogen. Recent data for animal diseases, however, have cast doubt on this assumption, without assessing the usefulness of alternative models. In this article, we use a combination of laboratory dose-response experiments, field transmission experiments, and observations of naturally ...

NEW RECORDS OF SOME ENTOMOPATHOGENIC FUNGI FROM IRAN

Examining dead insects from different locations in Mazandaran, Gilan and TehranProvinces, specimens with fungal outgrowth were selected for further investigations. After isolation and purification of fungi they were identified as follows:Beauveria brongniartii (Sacc.) Petch*On Coccinella septempunctata, Tehran Prov., Varamin, Ghara-Aghaj mountains, M.H. Ghassemi (IRAN 1025 C). Paecilomyces tenu...

Spatial scale and the spread of a fungal pathogen of gypsy moth.