the cowpea seed beetle, callosobruchus maculatus (fab.) (coleoptera: chrysomelidae: bruchinae) is one of the major pests infesting stored pulses and is distributed worldwide. in this research, efficiency of plant extracts from eucalyptus globulus labill. and eucalyptus camaldulensis dehnh. were tested against the cowpea seed beetle for its antifeedant activity. several experiments were designed...

The following brief synthesis of mountain pine beetle epidemiology is based on host-beetle interaction. In the first part I briefly describe the relationship between the dynamics of lodgepole pine and mountain pine beetle. The second part describes the phases in the infestation cycle and their main characteristics. This synthesis is based on published information on infestation behaviour in wes...

Red palm weevil and Rhinoceros beetle are the major pests inflicting severe damage to coconut palms. Due to ineffectiveness of the current management practices to control the two important pests on coconut, a study was conducted to know the attractiveness of red palm weevil and rhinoceros beetle to aggregation pheromone. Olfactometer studies indicated that the aggregation pheromone of red palm ...

Expanding from remote areas of Mexico to a worldwide scale, the ten-striped insect, the Colorado potato beetle (CPB, Leptinotarsa decemlineata Say), has risen from being an innocuous beetle to a prominent global pest. A diverse life cycle, phenotypic plasticity, adaptation to adverse conditions, and capability to detoxify or tolerate toxins make this insect appear to be virtually "indestructibl...

Transmission of pinewood nematode, Bursaphelenchus xylophilus, to mature, field grown Scots pines through feeding wounds of Monochamus carolinensis was investigated by caging nematode-infested beetles on pine branches for 24 hours. Nematodes were transmitted to 31 of 64 branches. Frequency of successful transmission was independent of the sex of the beetle but dependent upon beetle age. Transmi...

An understanding of spatial processes is necessary when modelling and predicting mountain pine beetle (Dendroctonus ponderosae Hopkins) behaviour. The recent availability of large area, mountain pine beetle data sets enables new approaches to studying spatial processes of infestations. Our goal is to explore observed, landscape level, spatial and spatial-temporal patterns of mountain pine beetl...

Spruce beetle outbreaks have been reported in the Rocky Mountains of western North America since the late 1800s. In their classic paper, Spruce Beetle in the Rockies, Schmid and Frye reviewed the literature that emerged from the extensive outbreaks in Colorado in the 1940s. A new wave of outbreaks has affected Rocky Mountain subalpine spruce-fir forests beginning in the mid-1980s and continuing...

0378-1127/$ see front matter 2011 Elsevier B.V. A doi:10.1016/j.foreco.2011.03.036 ⇑ Corresponding author. Present address: Natural R A204 NESB, Colorado State University, Fort Collins, C 970 491 2302; fax: +1 970 491 1965. E-mail address: [email protected] (P.H. The aim of our study was to estimate forest vulnerability and potential distribution of three bark beetles (Curculionidae: ...

Spatial accuracy in the detection and monitoring of mountain pine beetle populations is an important aspect of both forest research and management. Using ground-collected data, classification models to predict mountain pine beetle-caused lodgepole pine mortality were developed for Landsat TM, ETM+, and IKONOS imagery. Our results suggest that low-resolution imagery such as Landsat TM (30 m) is ...

We tested lethal trap trees and repellent semiochemicals as area treatments to protect host trees from spruce beetle (Dendroctonus rufipennis Kirby) attacks. Lethal trap tree treatments ("spray treatment") combined a spruce beetle bait with carbaryl treatment of the baited spruce. Repellent treatments ("spray-repellent") combined a baited lethal trap tree within a 16-m grid of MCH (3-methylcycl...