Nik G. Wiman

Establishing hazelnut stem water potential baseline to improve water management

Giacomo Dito, Sofia Russo, Nik G. Wiman, Sergio Tombesi

Introduction Irrigation management in modern filbert ( Corylus avellana L.) orchards is becoming increasingly important due to climate change, with rising temperatures and more frequent arid periods occurring across many hazelnut growing regions. While irrigation is essential to sustain productivity, water scarcity …

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Specialty Crops and Beyond: Scaling Semiochemical Solutions for Global Agriculture

Agenor Mafra-Neto, Arun Babu, Carmem Bernardi, John Borden et autres

Insect control using semiochemicals (chemicals that influence an organism’s behavior, such as pheromones) has been shown to be an environmentally sustainable, ecologically sound alternative to traditional pesticide applications for management of crop pests. Semiochemicals tend to be more selective in their activity …

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Light impacts feeding activity by brown marmorated stink bug on ‘Pinot noir’ grapes

E.T. Harris, Erika A. Maslen, Luca Rossini, Serhan Mermer et autres

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Light impacts feeding activity by brown marmorated stink bug on 'Pinot noir'grapes

E.T. Harris, Erika A. Maslen, Luca Rossini, Serhan Mermer et autres

info:eu-repo/semantics/published

A Crop Water Stress Index for Hazelnuts Using Low-Cost Infrared Thermometers

Dalyn McCauley, Sadie Q. Keller, Kody Transue, Nik G. Wiman et autres

Incorporating data-driven technologies into agriculture presents a promising approach to optimizing crop production, especially in regions dependent on irrigation, where escalating heat waves and droughts driven by climate change pose increasing challenges. Recent advancements in sensor technology have introduced diverse methods for …

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Dose-response and sublethal effects from insecticide and adjuvant exposure on key behaviors of Trissolcus japonicus

Jalal M. Fouani, Nik G. Wiman, Max Ragozzino, Ryan Paul et autres

In its native range, Trissolcus japonicus (Ashmead) (Hymenoptera: Scelionidae) is a main egg parasitoid of Halyomorpha halys (Stål) (Hemiptera; Pentatomidae). Adventive populations of this parasitoid have been spreading in Europe and North America, allowing active distribution efforts in these areas to utilize …

Assessment of leaf water potential and stomatal conductance as early signs of stress in young hazelnut tree in Willamette valley

Gessica Altieri, Nik G. Wiman, Francesca Santoro, Mariana Amato et autres

Corylus avellana L. is a species highly susceptible to water stresses caused by vapor pressure deficit and high temperature. Under such conditions, transpiration is strongly constrained even with good soil water availability. This is due to ineffective drought resistance mechanisms and indicates …

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A first look at non-structural carbohydrate dynamics in hazelnuts

Maciej A. Zwieniecki, Paula Guzmán‐Delgado, Heather Andrews, Kody Transue et autres

Updating hazelnut nitrogen requirements for modern production practices

Nik G. Wiman, Heather Andrews, K. Transue, A. Heinrich et autres

Establishment of the samurai wasp ( Trissolcus japonicus ), a biological control agent of the brown marmorated stink bug ( Halyomorpha halys ), in Oregon

David M. Lowenstein, R. J. Hilton, Christopher G. Adams, Heather Andrews et autres

Biology and management of big bud mites in Pacific Northwest (USA) hazelnut orchards

Heather Andrews, Emanuel D. Rudolph, Marit Pedersen, Nik G. Wiman

Insights from specimen data for two economicChrysobothrisspecies (Coleoptera: Buprestidae) in the western United States

Erica D. Rudolph, Nik G. Wiman

Abstract Chrysobothris mali Horn and Chrysobothris femorata (Olivier) (Coleoptera: Buprestidae) are wood-boring beetles native to western North America. Both species are highly polyphagous, feeding on a wide range of deciduous trees and shrubs, including fruit and nut trees as well as shade …

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