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Results: 52 publication requests found. Integration of physical and chemical tactics for managing Systena frontalis at ornamental nurseries The Red-headed Flea Beetle [Systena frontalis (F.); RHFB] is native to the central and eastern U.S. and has become a costly multivoltine pest of containerized nursery plants. We tested discs of long-lasting insecticidal netting (LLIN) secured over rims of plant containers in spring of 2023, using fo... Sensitivity to imidacloprid insecticide varies among some social and solitary bee species of agricultural value Bioassays using Apis and wild non-Apis species with differing natural histories tested the health effects of sublethal concentrations of imidacloprid on bee longevity and paralysis. Species were chosen for their high abundance and differences in sociality, floral specialization, age, and sex. Throug... Integration of physical and chemical tactics for managing Systena frontalis at ornamental nurseries The Red-headed Flea Beetle [Systena frontalis (F.); RHFB] is native to the central and eastern U.S. and has become a costly multivoltine pest of containerized nursery plants. We tested discs of long-lasting insecticidal netting (LLIN) secured over rims of plant containers in spring of 2023, using fo... UVC (254 nm) and Far UVC (222 nm) irradiation affects in vitro growth of Colletotrichum sp. isolates and their infection of detached strawberry leaves. Various alternatives are being developed to reduce or replace chemicals for plant disease control. We conducted laboratory studies to evaluate the effect of conventional UVC (245 nm) or FarUVC (222 nm) irradiation on growth of strawberry anthracnose pathogens in culture and on the disease response f... Insecticidal activity of Jatropha extracts against the azalea lace bug, Stephanitis pyrioides (Hemiptera: Tingidae) We assessed bioactivity of ethanolic extracts from 35 species of Jatropha against an ornamental plant pest, the azalea lace bug, Stephanitis pyrioides (Scott). Jatropha extracts were prepared by air-drying stem, root, or whole plant material, grinding the tissue into a fine powder, adding 70% ethano... 'USDA-Spiers' rabbiteye blueberry U*SDA-Spiers’ is a new hexaploid blueberry (Vaccinium hybrid ) developed by the United States Department of Agriculture-Agricultural Research Service and resulted from crosses among diverse blueberry germplasm and species including V. virgatum (rabbiteye blueberry) with V. constablei, V. corymbosu... Intensity of supplemental greenhouse lighting affects strawberry plant growth, response to anthracnose infection, and growth of Colletotrichum pathogens in culture. The effect of supplemental lighting on plant growth and response to anthracnose disease of strawberries was evaluated in two greenhouse trials, and their effect on the growth of strawberry anthracnose pathogens was evaluated in the laboratory. The objective of the greenhouse trials was to determine ... Insecticidal activity of jatropha extracts against the azalea lace bug, stephanitis pyrioides (Hemiptera: Tingidae) We assessed insecticidal activity of ethanolic extracts from 35 species of Jatropha against an ornamental plant pest, the azalea lace bug, Stephanitis pyrioides (Scott). Fresh shoots and roots were harvested, air-dried, and processed to a fine powder. Ethanolic extracts were then prepared, emulsifie... Laboratory bioassays of a native Arkansas isolate of Metarhizium robertsii (Bischoff, Rehner and Humber) (Hypocreales: Clavicipitaceae) and the biopesticide Met52® The rise of tick encounters and the incidence of tick-borne diseases necessitates the use of alternative tick control strategies. The lone star tick, Amblyomma americanum L. (Acarina: Ixodidae), feeds on a wide range of mammalian hosts and is implicated as a major vector of pathogens affecting human... Floral Visitors to Helianthus verticillatus, a Rare Sunflower Species in the Southern United States Helianthus verticillatus Small (whorled sunflower) is a federally endangered plant species found only in the southeastern United States. This species has potential horticultural value. Evidence suggests that H. verticillatus is self-incompatible and reliant on insect pollination for seed production.... Evaluating global Vaccinium germplasm for resistance against invasive Drosophila suzukii (Diptera: Drosophilidae) Integrated Pest Management (IPM) of spotted wing Drosophila (SWD) in fruits and berries emphasizes biological, cultural, and chemical control. Little research has focussed on genetic control via host plant resistance. Identifying resistant germplasm and patterns of host plant resistance are crucial ... Bee natural history traits affect pollinator sensitivity to imidacloprid insecticide Bioassays using Apis and wild non-Apis species with differing natural histories tested the health effects of sublethal concentrations of imidacloprid on bee longevity and paralysis. Species were chosen for their high abundance and differences in sociality, floral specialization, age, and sex. Throug... Association between density of honey bee (Hymenoptera: Apidae) foragers and fruit set in commercial fields of rabbiteye blueberries in Louisiana and Mississippi Field-scale data on the relationship between pollinator activity and fruit set are scarce for rabbiteye blueberries (Vaccineum virgatum syn. ashei Aiton). We measured the densities of foraging Apis mellifera L., Habropoda laboriosa F., Bombus Latreille spp. and Xylocopa virginica L. in 7-21 commerci... Erythritol and two of its derivatives reduce survival and reproductive rate of a serious blueberry pest, Drosophila suzukii (Diptera: Drosophilidae) Effective control of D. suzukii during harvest requires weekly applications of low-residual, broad-spectrum insecticides unavailable for organic farming. A novel ingestible insecticide, a 4-carbon polyol, mesoerythritol (erythritol), was found to kill 75% to 100% of larval and aduld SWD. However, me... Effects of coumaphos and imidacloprid on honey bee (Hymenoptera: Apidae) mortality in laboratory experiments The main objective of this study was to bioassay comparatively the effects of two common insecticides on honey bee Apis mellifera worker’s lifespan, food consumption, mortality, and expression of antioxidant genes. Newly emerged worker bees were exposed to organophosphate insecticide, coumaphos, a n... Diagnosis and integrated control of Varroa mites (Varroa destructor) infesting honey bee (Apis mellifera) colonies – a review Determining Varroa mite infestation levels in honey bee colonies and the proper method and time to perform a diagnosis are important for efficient mite control. Performing a powdered sugar shake or counting mites that drop from a colony onto a hive bottom board are two reliable methods for evaluatin... Susceptibility of bunch grape and muscadine cultivars to berry splitting and spotted-wing Drosophila oviposition One of the main disorders that widely reduces fruit quality and commercial value is fruit splitting. Fruit splitting is a physiological disorder that produces surface cracks that promotes disease and insect damage. Moreover, the spotted wing Drosophila (SWD), Drosophila suzukii (Matsumura), is a spe... Diet quality effects on honey bee (Hymenoptera: Apidae) mortality in laboratory conditions Poor food quality is likely to be detrimental to the lifespan of Apis mellifera. The objective of this study was to evaluate comparatively the effects of a mainly carbohydrate substitute (‘Pro Winter patty), a pollen substitute (Ultra Bee Dry) (both Mann Lake Ltd. products), and bee bread produced b... Hydroxymethylfurfural Affects Caged Honey Bees (Apis mellifera carnica) A high concentration of hydroxymethylfurfural (HMF) (e.g. 15 mg HMF per kg honey) indicates quality deterioration for a wide range of foods. In honey bee colonies, HMF in honey stores can negatively affect bee health and survival. Therefore, in the laboratory, we experimentally determined the effect... Laboratory assessment of erythritol derivatives on the survival and reproductive rate of Drosophila suzukii (Diptera: Drosophilidae) Drosophila suzukii (Matsumura) is a vinegar fly species native to Asia. Since its accidental introduction into the United States in 2008, this fly has reduced annual berry yields anywhere from 6% – 100%. Controlling the size of D. suzukii populations during harvest requires weekly applications of lo...