A5031109223- Insect-Plant Interactions and Control
- Hemiptera Insect Studies
- Biological Control of Invasive Species
- Freshwater macroinvertebrate diversity and ecology
- Forest Insect Ecology and Management
- Plant and animal studies
- Insect behavior and control techniques
- Insect and Pesticide Research
- Plant Parasitism and Resistance
- Entomopathogenic Microorganisms in Pest Control
- Insects and Parasite Interactions
- Insect and Arachnid Ecology and Behavior
- Allelopathy and phytotoxic interactions
- Weed Control and Herbicide Applications
- Research on scale insects
- Ecology and Vegetation Dynamics Studies
- Insect Pheromone Research and Control
- Phytoplasmas and Hemiptera pathogens
- Plant and Fungal Interactions Research
- Plant Virus Research Studies
- Horticultural and Viticultural Research
- Ecology and Conservation Studies
- Tardigrade Biology and Ecology
- Plant and fungal interactions
- Animal and Plant Science Education
California Department of Pesticide Regulation
2020-2025
Agricultural Research Service
2017-2024
United States Department of Agriculture
2024
University of California, Berkeley
2011-2023
Western Regional Research Center
2019
Laboratoire Physiologie Cellulaire & Végétale
2015
University of California System
2012
In recent years, there has been an increase in the adventive establishment and spread of parasitoid wasps outside their native range. However, lack taxonomic tools can hinder efficient screening field-collected samples to document range expansion parasitoids on continent-wide geographic scales. Here we report that Leptopilina japonica (Hymenoptera, Figitidae), a globally invasive fruit pest Drosophila suzukii (Diptera, Drosophilidae), is now widespread much North America despite not having...
Abstract Mechanisms responsible for the success or failure of agricultural diversification are often unknown. Most studies arthropod pest management focus on enhancing natural enemy effectiveness. However, non‐crop plants can also change crop host quality by reducing adding soil nutrients water, and therefore improve hamper suppression. Native perennial ground covers may provide food habitat to enemies and, in terms competition be more compatible with than exotic annuals. We conducted a...
Abstract Asobara japonica (Hymenoptera: Braconidae), Ganaspis brasiliensis and Leptopilina Figitidae) are Asian larval parasitoids of spotted wing drosophila, Drosophila suzukii (Diptera: Drosophilidae). This study evaluated these parasitoids’ capacity to attack develop from 24 non-target drosophilid species. Results showed that all three were able parasitize host larvae multiple species in artificial diet; A. developed 19 tested species, regardless the phylogenetic position L. 11 species;...
Pachycrepoideus vindemiae (Rondani) and Trichopria drosophilae (Perkins) are among a few indigenous parasitoids attacking the invasive Drosophila suzukii (Matsumura) (Diptera: Drosophilidae) in North America. Both parasitoid species occur California, whereas only P. has been reported from Oregon. We compared thermal performance of California populations T. drosophilae, Oregon population at eight constant temperatures (12.6-32.8°C). could develop all tested temperatures. failed to or above...
We provide recommendations for sampling and identification of introduced larval parasitoids spotted-wing drosophila, Drosophila suzukii (Matsumura) (Diptera: Drosophilidae). These are either under consideration importation (aka classical) biological control introductions, or their adventive (presumed to have been accidentally introduced) populations recently discovered in North America Europe. Within the context ecology D. its parasitoids, we discuss advantages disadvantages estimating...
Abstract Bagrada bug, hilaris (Burmeister) (Hemiptera: Pentatomidae), is an invasive pest of cole crops in the United States. Because it also feeds on widespread weeds and persists natural habitats surrounding crop fields, conventional control strategies are often ineffective at providing long-term control. One egg parasitoid, Gryon aetherium Talamas (Hymenoptera: Scelionidae), a promising biological candidate because its ability to parasitise B. buried eggs. Recently, adventive populations...
Abstract The reduction in floral diversity that often accompanies agricultural intensification may compromise the effectiveness of many natural enemies. Field studies examining effects resources on enemy fitness have been rare, however, particularly for predators such as hoverflies. Making link between presence and suppression herbivores crop fields has proved difficult. We investigated resource plant sweet alyssum, Lobularia maritima (L.) Desv. (Brassicaceae), aphid by hoverfly Eupeodes...
A morphological and molecular analysis of Gryon Haliday (Platygastroidea, Scelionidae) was conducted to provide a taxonomic phylogenetic context for species under evaluation as biological control agent Bagrada hilaris (Burmeister) (Hemiptera, Pentatomidae). Our revealed that is polyphyletic the not G. gonikopalense , name tentatively applied this in 2019. We here describe new, aetherium Talamas sp. nov. resurrect generic Hadronotus Förster. Morphological characters delimit our concepts are...
Bagrada bug, hilaris (Burmeister) (Hemiptera, Pentatomidae), has become a major pest of cole crops (cabbage, broccoli, cauliflower, kale) in California since its arrival 2008. In this study we documented parasitism B. eggs at highly infested site northern by deploying sentinel and collecting naturally-laid the soil. Two parasitoids, Gryon aetherium Talamas (Hymenoptera, Scelionidae) Ooencyrtus californicus Girault Encyrtidae), emerged from eggs, but only G. was attacking is currently being...
The presence of intact natural ecosystems in agricultural landscapes can mitigate losses the diversity enemies and enhance ecosystem services. However, native may fail to persist agroecosystems if invaders dominate species interactions. In this study, nonnative spiders were sampled along transects that extended from oak woodland riparian zones into surrounding California vineyards, assess role habitat as a source for spider biodiversity vineyard landscape, compare dominance exotic...
Summary 1. Management strategies to enhance ecosystem services in agroecosystems often seek increase predator biodiversity. Invaders commonly dominate communities agricultural landscapes, however, and the impacts of exotic predators on native are largely unknown. Exotic may complement diversity herbivore suppression, or they disrupt suppression through interference. 2. We examined a dominant within diverse community California vineyard. Interactions between wandering spider Cheiracanthium...
The vine mealybug (VMB), Planococcus ficus (Hemiptera: Pseudococcidae), is a key insect pest of vineyards, and improvements in sustainable control this are needed to meet increasing consumer demand for organically farmed products. One promising option mating disruption. In series experiments conducted from 2004 2007, we tested the effects disruption on trap captures Pl. males pheromone-baited traps, numbers age structure vines, damage grape clusters. From 2005, dispenser load (mg active...
Abstract Pachycrepoideus vindemiae (Rondani) (Hymenoptera: Pteromalidae) and Trichopria drosophilae (Perkins) Diapriidae) are two cosmopolitan generalist pupal parasitoids that among a few of the resident in North America capable attacking Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), an invasive pest small soft fruit crops worldwide. Ganaspis brasiliensis (Ihering) is specialist larval parasitoid D. was recently approved for biological control introduction against USA. As...
Invasions have often been linked to reduced biodiversity, but the role of non-native species in decline native is ambiguous. In a 2003 survey four California vineyard regions, exotic spiders (Cheiracanthium spp.) were more dominant vineyards with lower spider diversity and abundance. There was no evidence for interactions invasion Cheiracanthium spiders, however, as from same feeding guild most abundant regions high levels. Comparison conducted 10 years earlier indicated that recent invader...
Abstract Aim The role of landscape variation in shaping invasion success remains unclear, particularly for exotic predators. We examined whether native and predators responded similarly or differently to ecological change at the scale. Location Vineyards surrounding natural habitat N apa V alley, C alifornia, USA . Methods surveyed spider communities vineyards throughout alley used regression analysis examine effects context (proportion vineyard monoculture proportion developed land...