The evaluation of Apanteles plutellae Kurdj and two introduced parasites, Diadegma eucerophaga Grav and Thyraeella collaris Horstn of Plutella xylostella was carried out by first measuring the searching efficiency (in terms of area of discovery (a), the killing power (K), and other biological attributes in the laboratory, and then in the field. The laboratory results indicated that D. euceropha...

The mature larva of Stenichnus collaris is re-described on the basis of a shed larval skin. This is the first description of an immature Stenichnus identified by rearing to an adult beetle, and not only by collecting the larva in association with adults, as in previously published works. New data on the life history of St. collaris are provided, and possible serial homology of chaetotaxic struc...

With the discovery of the larval parasitoid, Cotesia plutellae Kurdjumov, and the successful introduction and establishment of two other exotic parasitoid species, viz. Diadegma semiclausum Hellen and Diadromus (Thyraeella) collaris Gravenhorst in the Cameron Highlands, biological control was given greater emphasis in the development of IPM for diamondback moth, Plutella xylostella (L.), in Mal...

The ability of the whiptail lizard Aspidoscelis marmorata (Teiidae) to detect and discriminate chemical stimuli associated with the integument of a sympatric saurophagous lizard (Crotaphytus collaris) was tested. Females of A. marmorata were presented with cotton swabs containing chemical cues from C. collaris and three species of nonsaurophagous lizards, as well as water and cologne (pungency ...

Eighty-eight fecal samples from 2 species of pika, Ochotona collaris and Ochotona hyperborea, collected in Alaska (N = 53) and Russia (N = 35), respectively, were examined for the presence of coccidia (Apicomplexa: Eimeriidae). Five oocyst morphotypes were observed. In O. collaris, we found Eitmeria calentinei, Eimeria cryptobarretti, and Eimeria klondikensis, whereas in O. hyperborea, we found...