نتایج جستجو برای: beetles

تعداد نتایج: 7321  

Journal: :Journal of economic entomology 2003
Timothy M Nowatzki Bradly Niimi Kelli J Warren Sean Putnam Lance J Meinke David C Gosselin F Edwin Harvey Thomas E Hunt Blair D Siegfried

Field and laboratory studies were conducted in 2000 and 2001 to determine the feasibility of mass marking western corn rootworm adults, Diabrotica virgifera virgifera LeConte, with RbCl in the field. Results showed that application of rubidium (Rb) in solution to both the soil (1 g Rb/plant) and whorl (1 g Rb/plant) of corn plants was optimal for labeling western corn rootworm adults during lar...

Journal: :Environmental entomology 2010
William P Shepherd Brian T Sullivan Bradley M Hoosier Joanne P Barrett Tessa A Bauman

We conducted laboratory and field bioassays to characterize the pheromone system of an ash bark beetle, Hylesinus pruinosus Eichhoff (Coleoptera: Curculionidae: Scolytinae). Solitary females in newly initiated galleries in ash logs produced (+)-exo-brevicomin, whereas male beetles paired with females produced (+)-endo-brevicomin, lesser quantities of (+)-exo-brevicomin, and a third compound tha...

Journal: :Journal of the Royal Society, Interface 2011
Jonathan Voise Michael Schindler Jérôme Casas Elie Raphaël

Organized structures produced by dynamic self-assembly are often observed in animal groups. Static self-assembly, however, has to date only been observed at the cellular and sub-cellular levels. The aim of this study was to analyse organized structures in immobile whirligig beetle groups on the water surface. We used theoretical and computational approaches to model the meniscus around whirligi...

Journal: :Journal of chemical ecology 2003
Daniel R Miller Christopher M Crowe Christopher Asaro Gary L Debarr

The white pine cone beetle, Conophthorus coniperda, exhibited dose and enantiospecific responses to alpha-pinene in stands of mature eastern white pine, Pinus strobus, in a seed orchard near Murphy, North Carolina, USA. (-)-alpha-Pinene significantly increased catches of cone beetles to traps baited with (+/-)-trans-pityol. (+)-alpha-Pinene did not increase catches of beetles to pityol-baited t...

2016
Helena I. Hanson Erkki Palmu Klaus Birkhofer Henrik G. Smith Katarina Hedlund Nicolas Chaline

In order to improve biological control of agricultural pests, it is fundamental to understand which factors influence the composition of natural enemies in agricultural landscapes. In this study, we aimed to understand how agricultural land use affects a number of different traits in ground beetle communities to better predict potential consequences of land-use change for ecosystem functioning....

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1980
R L Metcalf R A Metcalf A M Rhodes

The characteristic bitter substances of the Cucurbitaceae act as kairomones for a large group of diabroticite beetles (Chrysomelidae, Galerucinae, Luperini), promoting host selection and compulsive feeding behavior. These beetles (e.g., Diabrotica undecimpunctata howardi) respond to as little as 1 ng of cucurbitacin (Cuc) B on thin-layer plates by arrest and compulsive feeding. Six species of d...

Journal: :Evolution; international journal of organic evolution 2010
Jiri Hulcr Anthony I Cognato

Ambrosia beetles, dominant wood degraders in the tropics, create tunnels in dead trees and employ gardens of symbiotic fungi to extract nutrients from wood. Specificity of the beetle-fungus relationship has rarely been examined, and simple vertical transmission of a specific fungal cultivar by each beetle species is often assumed in literature. We report repeated evolution of fungal crop steali...

Journal: :Canadian journal of microbiology 2007
Pedro Romón XuDong Zhou Juan Carlos Iturrondobeitia Michael J Wingfield Arturo Goldarazena

Bark beetles (Coleoptera: Scolytinae) are known to be associated with fungi, especially species of Ophiostoma sensu lato and Ceratocystis. However, very little is known about these fungi in Spain. In this study, we examined the fungi associated with 13 bark beetle species and one weevil (Coleoptera: Entiminae) infesting Pinus radiata in the Basque Country of northern Spain. This study included ...

2013
Xiao-Dong Yu Liang Lü Tian-Hong Luo Hong-Zhang Zhou

We report on the species richness patterns of epigaeic beetles (Coleoptera: Carabidae and Staphylinidae) along a subtropical elevational gradient of Balang Mountain, southwestern China. We tested the roles of environmental factors (e.g. temperature, area and litter cover) and direct biotic interactions (e.g. foods and antagonists) that shape elevational diversity gradients. Beetles were sampled...

Journal: :Insect science 2013
Olivia K Niziolek May R Berenbaum Evan H Delucia

To examine how the major elements of global change affect herbivory in agroecosystems, a multifactorial experiment was conducted where soybeans were grown at two levels of carbon dioxide and temperature, including those predicted for 2050, under otherwise normal field conditions. Japanese beetles (Popillia japonica Newman) were enclosed on foliage for 24 h, after which the beetle survivorship, ...

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