A5007223063- Insect-Plant Interactions and Control
- Forest Insect Ecology and Management
- Plant and animal studies
- Insect and Pesticide Research
- Research on scale insects
- Insect Pest Control Strategies
- Entomopathogenic Microorganisms in Pest Control
- Forest Ecology and Biodiversity Studies
- Entomological Studies and Ecology
- Insect behavior and control techniques
- Animal and Plant Science Education
- Weed Control and Herbicide Applications
- Insect Pheromone Research and Control
- Plant Parasitism and Resistance
- Plant and Fungal Interactions Research
- Ecology and Vegetation Dynamics Studies
- Hymenoptera taxonomy and phylogeny
- Plant responses to elevated CO2
- Fire effects on ecosystems
- Plant Pathogens and Fungal Diseases
- Agronomic Practices and Intercropping Systems
- Hemiptera Insect Studies
- Species Distribution and Climate Change
- Insect and Arachnid Ecology and Behavior
- Plant Virus Research Studies
Purdue University West Lafayette
2011-2025
State Street (United States)
2009-2023
Indiana Department of Natural Resources
2017
Connecticut Agricultural Experiment Station
2010
University of Maryland, College Park
1987-1993
Ambrosia beetles (Coleoptera: Curculionidae: Scolytinae) are increasingly important pests of nursery-grown trees because the arrival several invasive species. bore into young and inoculate them with ambrosia fungus, which interferes vascular transport resulting in limb or tree death. In spring, when active, growers make frequent applications pyrethroid insecticides to susceptible species deter from boring trees. Applications often made airblast sprayers that forcefully release insecticide...
In this report we examine the effects of short-term phenological changes in host suitability on performance gypsy moth, Lymantria dispar (L.), larvae. The time frame examined was a 2-wk period during which most moth larvae hatch and feed central Maryland. Oak supported high levels survivorship for almost 2 wk, beech remained suitable young less than 1 wk; hickory maple were intermediate. Larvae did not respond uniformly to chronological foliage when fed leaves from different tree species....
Abstract Ticks and tick-borne disease (TBD) risks are increasing in Indiana North America. The successful prevention, diagnosis, treatment of TBDs requires healthcare professionals be well-informed prepared. This study reports the findings a 2020 online survey 465 professionals, designed to assess their knowledge ticks identify factors influencing total scores. included 24 discrete/ordinal questions one open-ended question. Statistical analyses, including ANOVA, t-tests, Boruta algorithm,...
Cover sprays and residual insecticides are tactics used by landscapers arborists to control arthropod pests on trees shrubs in urban settings. Trees residential landscapes that received three cover annually for at least 4 years harbored a greater diversity of scale insect were much more likely be infested with scales than treated shorter periods time. Oak (Quercus palustris) an institutional landscape significantly lower numbers beneficial arthropods pesticide lacked activity. The...
Attack rates of the parasitoid Leptomastix dactylopii (Howard) were examined in petri dishes and on caged plants that varied architectural characteristics. Individual female parasitoids placed into containing a range densities citrus mealybug, Planococcus citri (Risso). Green yellow-variegated coleus, Solenostemon scutellarioides (L.) Codd, used to determine effects plant architecture rate at which L. parasitized mealybugs. Coleus categorized size classes based height, number leaves, leaf...
Novel biorational insecticides are rapidly replacing more toxic, broad-spectrum compounds to control pests of ornamental plants. These new formulations widely regarded as safe, effective, and environmentally sound with minimal impact on nontarget organisms. We tested several traditional for their ability euonymus scale, Unaspis euonymi (Comstock), potential impacts the aphelinid parasitoid, Encarsia citrina (Crawford). Soil-applied acephate foliar-applied pyriproxyfen exhibited superior but...
Advances in control can help municipal foresters save ash trees from emerald borer (EAB) [Agrilus planipennis (Fairmaire)] urban forests. Although of any size be protected this pest, cities often do not implement programs because they fail to recognize and act on incipient populations EAB. In study, researchers develop a model for predicting mortality over an eight-year period, validated with data the removal >14,000 killed by EAB Fort Wayne, Indiana, U.S. then developed sampling scheme...
Honeydew production is a characteristic of soft scales and other hemipteran insects. has the capacity to alter ecology predators parasitoids because it used as food resource can contain insecticidal proteins from host plants. We examined honeydew excreted by striped pine scale (Hemiptera: Coccidae), Toumeyella pini (King), after feeding on trees treated with systemic insecticides determine whether they could eliminate compounds in honeydew. Imidacloprid spirotetramat were applied at labeled...
The present study evaluated the population dynamics of heteroecious soybean aphid Aphis glycines Matsumura (Hemiptera: Aphididae) during an 8‐year period in Indiana, shortly after its detection North America. Sampling conducted at multiple locations revealed that A. exhibited a 2‐year oscillation cycle repeated itself four times between 2001 and 2008: years low abundance were consistently followed by high abundance. Similar patterns coccinellids (Coleoptera: Coccinellidae) fields, both...
Scale insects (Hemiptera: Coccoidea) are among the most economically important pests of ornamental plants. Soft scales (Coccidae) phloem-feeding that produce large amounts honeydew. By contrast, armored (Diaspididae) feed on contents plant cells and a waxy test covers their bodies. We studied two species [pine needle scale ( Chionaspis pinifoliae ) oleander Aspidiotus nerii )] soft [calico Eulecanium cerasorum striped pine Toumeyella pini to compare efficacy selected insecticides. In...
The lack of decision-making guidelines for pest causing aesthetic damage continues to be a serious impediment the development and implementation integrated management programs many systems. A common ornamental shrub, American arborvitae, key insect woody ornamentals, bagworm, were used demonstrate methodology estimating modified economic injury level (ElL) based on perceptions customers at retail nurseries. similar approach, customer damage, was estimate an (AIL). Both ElL AIL are relatively...
Insecticidal soap and horticultural oil have the potential to kill individuals within populations of soft-bodied insect pests by suffocation. However, scientific literature is inconsistent about efficacy insecticidal soaps petroleum-based oils against armored scale (Hemiptera: Diaspidae) soft Coccidae). We examined scales at different developmental life stages. Studies were conducted in laboratory field with two species [pine needle ( Chionaspis pinifoliae ) oleander Aspidiotus nerii )]...
Abstract Survival of North American species ash (Oleaceae: Fraxinus spp. L.) is threatened by emerald borer (EAB), Agrilus planipennis (Fairmaire), a phloem-feeding beetle that destroys the vascular system its host. In forested sites where dominant overstory species, mortality caused EAB can substantially alter conditions, with potentially cascading effects on ecosystems. urban forests, trees were often abundant and provided an array ecosystem services because their rapid growth, capacity to...
Patterns of Unaspis euonymi (Comstock) feeding and resource use were examined on Euonymus fortunei (L.) japonica (L.). Intracellular stylet penetration was observed in stems, leaves, leaf petioles. In 62% tracks terminated the upper palisade, petioles, 70% spongy mesophyll. however, 57% xylem. Branched present all tissues suggest active retraction reinsertion mouth parts by scales. On leaves variegated E. 'Aureus', female scales yellow portions had 22% fewer offspring than those green...
Greenhouse studies were conducted from 1996 to 1998 determine the efficacy of spinosad, and acephate, against western flower thrips ( Frankliniella occidentalis Pergande) on transvaal daisy Gerbera jamesonii H. Bolus ex. Hook f). In addition, number natural enemies inside outside greenhouse was determined. Studies arranged in a randomized complete-block design with four blocks treatments per block. Three rates 50, 100, 200 mg·L -1 (ppm), one rate 600 used all three studies. Plants...
The current study evaluated the effect of different classes insecticides against bagworms (Lepidoptera: Psychidae) on arborvitae by using a laboratory bioassay that allowed us to simultaneously evaluate feeding rate, growth, and mortality larvae. Soil application systemic dinotefuran (to lesser extent) chlothianidin increased larval reduced rate growth larvae, up 50 d posttreatment. effectiveness makes them well suited control tall trees heavily infested in upper canopy. Chlorantranilipole...
Urban habitats can alter tree physiology in ways that make trees more susceptible to insect pests. We examined how urban conditions (e.g., impervious surfaces and warming) affected the soft scale insect, European fruit lecanium, Parthenolecanium corni Bouché (Hemiptera: Coccidae) health of thornless honeylocust (Gleditsia tricanthos L. var. inermis) Indianapolis, Indiana, USA. Hot cool study sites were selected based on surface air temperatures obtained from thermal LANDSAT-8 images overlaid...
Honeylocust (Gleditsia triacanthos L. var. inermis) trees in urban areas are attacked principally by three insect pests: honeylocust plant bug, mimosa webworm, and spider mite. One hundred on the Purdue University campus were studied to better understand influence of landscape characteristics populations these pests. Specifically, amount hardscape, defined as imperviousness under around trees, including roads, sidewalks, parking lots, buildings; density honeylocust; diversity tree species...