A5072098733- Insect-Plant Interactions and Control
- Plant and animal studies
- Biological Control of Invasive Species
- Insect and Pesticide Research
- Forest Insect Ecology and Management
- Plant Parasitism and Resistance
- Insect behavior and control techniques
- Ecology and Vegetation Dynamics Studies
- Insect Pheromone Research and Control
- Animal Ecology and Behavior Studies
- Insect Pest Control Strategies
- Insect Resistance and Genetics
- Insect symbiosis and bacterial influences
- Insect and Arachnid Ecology and Behavior
- Mathematical and Theoretical Epidemiology and Ecology Models
- Entomopathogenic Microorganisms in Pest Control
- Hymenoptera taxonomy and phylogeny
- Plant Virus Research Studies
- Weed Control and Herbicide Applications
- Evolution and Genetic Dynamics
- Hemiptera Insect Studies
- Lepidoptera: Biology and Taxonomy
- Study of Mite Species
- Research on scale insects
- Horticultural and Viticultural Research
University of California, Berkeley
2014-2024
University of Edinburgh
2017-2024
University of California System
1998-2017
Natural History Museum Aarhus
2012
Natural History Museum of Denmark
2012
Albany Research Institute
2012
CABI Switzerland
1986-1994
CAB International
1990
University of Oxford
1982
University of East Anglia
1981
Bees are critical for food crop pollination, yet their populations declining as agricultural practices intensify. Pollinator-attractive field border plantings (e.g. hedgerows and forb strips) can increase bee diversity abundance in areas; however, recent studies suggest these plants may contain pesticides. Pesticide exposure wild bees remains largely unknown; this information is needed to inform pesticide regulations meant protect bees. It important determine whether that attract support...
Classical biological control (natural enemy introductions) has long served as a paradigm for the role of predators and parasitoids in insect herbivore population dynamics, it is widely held that there no fundamental difference between successful action native natural enemies control'). We ask if really phenomenon. To address this, we focus on two aspects potentially influence ability to exert top-down victim populations: (1) most often attempted against herbivores occupying habitats have...
Abstract. 1. A model of the functional response to prey density is derived include reduction in time available for search, T s , resulting from predator satiation. 2. For larger items satiation occurs at each capture and reduced by attack digestive pause a series cycles. small foraging continuous low densities with solely time. At higher after several 3. comparison predicted asymptotic level using experimentally estimated parameter values, maximum consumption aphids larval adult coccinellids...
Abstract Feeding experiments were conducted with Trichogramma platneri Nagarkatti (Hymenoptera: Trichogrammatidae) reared from the Angoumois grain moth, Sitotroga cerealella (Oliver) (Lepidoptera: Gelechiidae). T. provisioned host eggs do not live any longer than without eggs. Longevity of is inversely related to temperature declining 53 days at 10 °C 3 35 for honey‐fed parasitoids and 9 1 day unfed parasitoids. Sugar sources are necessary prolong longevity , but a source amino acid did...
Abstract The seminal work of Stern and his coauthors on integrated control has had a profound long‐lasting effect the development IPM programs in western orchard systems. Management systems based solely pesticides have proven to be unstable, success orchards been driven by conservation natural enemies secondary pests, combined with mating disruption suppress key lepidopteran pests. However, legislatively mandated changes pesticide use patterns prompted Food Quality Protection Act 1996...
1. The occurrence of enemy-free space presents a challenge to the top-down control agricultural pests by natural enemies, making bottom-up factors such as phytochemistry and plant distributions important considerations for successful pest management. Specialist herbivores like cabbage aphid Brevicoryne brassicae co-opt defence system plants in family Brassicaceae sequestering glucosinolates utilize their own defence. wild mustard Brassica nigra, an alternate host aphids, contains more than...
The release of biological control agents has been an important means controlling invasive species for over 150 years. While these releases have led to the sustainable 250 pest and weed worldwide, a minority caused environmental harm. A growing recognition risks focus on risk assessment beginning in 1990s along with precipitous decline releases. this new greatly improved safety control, it came at cost lost opportunities solve problems associated species. framework that incorporates benefits...
A general tritrophic model of intermediate complexity representing the dynamics trophic level biomass and numbers is presented. The rudiments behavior physiology resource acquisition conversion are incorporated as functional numerical response models. used to examine effects position on bottom—up—top—down regulation populations in theory practice. zero growth isoclines interacting system. herbivore (M 2 ) predator 3 but not plant 1 can be solved explicitly. have two forms that depend whether...
Most models of host-parasitoid interactions consider parasitoid attack rates or, more accurately, encounter to be limited by the ability parasitoids find suitable hosts. Some extend this limitation include length time it takes a handle each host. Here we dynamics in context being number eggs that has lay when host is at high densities and individual hosts low densities. Although rate function obtain mathematically equivalent previously obtained functions handling time, stability properties...
Summary 1. In this study we examined the clutch size of Hyssopus pallidus (Askew) (Hymenoptera, Eulophidae), a gregarious ectoparasitoid codling moth (Lepidoptera, Tortricidae) larvae that is characterized by host handling time 2 days approximately. 2. Clutch increased asymptotically with larval (fresh weight) to maximum 32 eggs. A single male developed from each clutch, brood survival was 83% and pupal female offspring 0·45 mg, all independent size. 3. comparison response both experienced...
Abstract. 1. Despite considerable recent debate on the suitability of ratio dependence as a more general form for functional response in consumer–victim relationships, there have been few detailed studies to experimentally determine insect parasitoids host and parasitoid density at local scale. 2. The experimental host, Ephestia kuehniella , was used test egg parasitoid, Trichogramma minutum species widely inundative biological control. examined through four series experiments which either...
The management of agroecosystems affects intricately linked assemblages organisms, and nontarget species are not necessarily unimpacted. We examined the effect Bt-cotton lepidopteran prey (Spodoptera exigua Hübner) that had ingested it on adult survivorship four important heteropteran predators cotton pests. Longevity significantly decreased for Orius tristicolor White Geocoris punctipes Say (by 28 27% control value, respectively), whereas no was found Nabis sp. Zelus renardii Kolenati. This...