308 research outputs found
Bennett, Agnes interview for the Miami Valley College of Nursing and Health Oral History Project
Carol Holdcraft interviewed Agnes Bennett on April 30, 2002 about the founding of Wright State University College of Nursing and Health. In the interview, Bennett discusses her career and her decision to come to Wright State as a faculty member for the College of Nursing and Health
Gmeiner, Jayne interview for the Miami Valley College of Nursing and Health Oral History Project
Carol Holdcraft interviewed Jayne Gmeiner on November 15, 2006 about the founding of the Wright State University College of Nursing and Health. In the interview, Gmeiner discusses her career and her decision to come to Wright State as a student with the College of Nursing and Health
Sommerville, Bonnie interview for the Miami Valley College of Nursing and Health Oral History Project
Carol Holdcraft and Donna Miles Curry interviewed Bonnie Sommerville on December 3, 2002 about the founding of Wright State University College of Nursing and Health. In the interview, Sommerville discusses her career and her decision to come to Wright State as a student and faculty member for the College of Nursing and Health
Stormer, Karen interview for the Miami Valley College of Nursing and Health Oral History Project
Carol Holdcraft and Donna Miles Curry interviewed Karen Stormer on October 30, 2007 about the founding of the Wright State University College of Nursing and Health. In the interview Ms. Stormer discusses her career and her decision to come to Wright State as a student with the College of Nursing and Health
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Cranberry Toad bugs: What are they?
Abstract:
In recent years, there has been an increased concern among New Jersey cranberry growers for the potential increase in secondary pests, such as the cranberry toad bug Phylloscelis atra (Hemiptera: Dictyopharidae), because of changes in pest management strategies (e.g., adoption of new reduced-risk products and decreased applications of broad-spectrum insecticides). In 2013, we observed damage in cranberry bogs caused by the cranberry toad bug in New Jersey. Here we report results from studies being conducted to: 1) determine the life cycle of cranberry toad bugs in New Jersey cranberries; 2) determine the impact of toad bug feeding damage on cranberries, and 3) assess the efficacy of various insecticides against toad bugs. Our results from 2016 show that 1st instar nymphs start to appear by the end of June, and develop throughout July and August until early September. Adults are active from the end of July through October (harvest), and eggs are laid from end of August through October. To determine the impact of toad bugs on cranberry vine health and fruit quality, we conducted studies to characterize their feeding damage to cranberries at various densities. Treatments consisted of 0 (control), 10, 25, or 50 toad bug nymphs, replicated 5 times. Nymphs were used as they are the main target of insecticide applications and the cause of most of the early damage to the vines. Toad bug damage to uprights differed among treatments. Although there were no differences in number of damaged uprights between the control and 10 toad bugs, damage to uprights was three times higher at densities equal or greater than 25 toad bugs. No differences were found on number of damaged fruit or fruit weight. In 2016, we evaluated the efficacy of a late season application of nine insecticides (plus an untreated control) against toad bugs. A cranberry bog (var. ‘Early Black’) located at the Rutgers P.E. Marucci Center was divided into 40 (4.5 m x 6 m) plots for a total of 10 treatments replicated four times. Plots were sprayed on 5 August using a customized 2.4 m boom sprayer, and insecticide treatments were applied in 20 gal water per ha. Vacuumed samples were taken on 3 August (pre-treatment) and on 12 August (post-treatment) from 1 m2 sections in each plot with a 2‐cycle backpack aspirator. Lorsban, Sevin, Diazinon, Brigade, Agri-Mek, and Assail were effective at controlling toad bugs, whereas Beleaf, Exirel, and Closer were not effective. These studies are being repeated in 2017
Oroszi, Jill interview for the Miami Valley College of Nursing and Health Oral History Project
Donna Miles Curry, Carol Holdcraft, and Tara Rower interviewed Jill Oroszi on February 25, 2009 about her perspective on the growth and foundation of the program from the perspective of someone who previously was not directly involved with the profession
Sucrose Improves Insecticide Activity Against Drosophila suzukii (Diptera: Drosophilidae)
The addition of sucrose to insecticides targeting spotted wing drosophila, Drosophila suzukii (Matsumura), enhanced lethality in laboratory, semifield, and field tests. In the laboratory, 0.1% sucrose added to a spray solution enhanced spotted wing drosophila feeding. Flies died 120 min earlier when exposed to spinosad residues at label rates enhanced with sucrose. Added sucrose reduced the LC50 for dried acetamiprid residues from 82 to 41 ppm in the spray solution. Laboratory bioassays of spotted wing drosophila mortality followed exposure to grape and blueberry foliage and/or fruit sprayed and aged in the field. On grape foliage, the addition of 2.4 g/liter of sugar with insecticide sprays resulted in an 11 and 6% increase of spotted wing drosophila mortality at 1 and 2 d exposures to residues, respectively, averaged over seven insecticides with three concentrations. In a separate experiment, spinetoram and cyantraniliprole reduced by 95-100% the larval infestation of blueberries, relative to the untreated control, 7 d after application at labeled rates when applied with 1.2 g/liter sucrose in a spray mixture, irrespective of rainfall; without sucrose infestation was reduced by 46-91%. Adding sugar to the organically acceptable spinosyn, Entrust, reduced larval infestation of strawberries by >50% relative to without sugar for five of the six sample dates during a season-long field trial. In a small-plot field test with blueberries, weekly applications in alternating sprays of sucrose plus reduced-risk insecticides, spinetoram or acetamiprid, reduced larval infestation relative to the untreated control by 76%; alternating bifenthrin and phosmet (without sucrose) reduced infestation by 65
Sex Pheromone of the Scarab Beetle Phyllophaga ( Phytalus) georgiana (Horn)
The sex pheromone of Phyllophaga (Phytalus) georgiana was characterized as valine methyl ester, tentatively the l-enantiomer. This is the first sex pheromone identified from the Phyllophaga subgenus Phytalus. The pheromone was extracted from female glands, the active component isolated by coupled gas chromatography-electroantennogram detection analysis, characterized by mass spectrometry, and shown to be active in field tests. The seasonal flight pattern was determined for P. georgiana as well as for three other species, P. anxia (both northern and southern genitalic forms), P. gracilis, and P. postrema. The latter three species were captured in traps baited with l-isoleucine methyl este
Relative toxicity and residual activity of insecticides used in blueberry pest management: mortality of natural enemies
ABSTRACT A series of bioassays were conducted to determine the relative toxicities and residual activities of insecticides labeled for use in blueberry (Vaccinium corymbosum L.) on natural enemies, to identify products with low toxicity or short duration effects on biological control agents. In total, 14 insecticides were evaluated using treated petri dishes and four commercially available natural enemies (Aphidius colemani Viereck, Orius insidiosus [Say], Chrysoperla rufilabris [Burmeister], and Hippodamia convergens [Gué rin-Mené ville]). Dishes were aged under greenhouse conditions for 0, 3, 7, or 14 d before introducing insects to test residual activity. Acute effects (combined mortality and knockdown) varied by insecticide, residue age, and natural enemy species. Broad-spectrum insecticides caused high mortality to all biocontrol agents, whereas products approved for use in organic agriculture had little effect. The reduced-risk insecticide acetamiprid consistently caused signiÞcant acute effects, even after aging for 14 d. Methoxyfenozide, novaluron, and chlorantraniliprole, which also are classiÞed as reduced-risk insecticides, had low toxicity, and along with the organic products could be compatible with biological control. This study provides information to guide blueberry growers in their selection of insecticides. Further research will be needed to determine whether adoption of a pest management program based on the use of more selective insecticides will result in higher levels of biological control in blueberry
Spermatogenesis and sertoli cell activity in mice lacking Sertoli cell receptors for follicle stimulating hormone and androgen
Spermatogenesis in the adult male depends on the action of FSH and androgen. Ablation of either hormone has deleterious effects on Sertoli cell function and the progression of germ cells through spermatogenesis. In this study we generated mice lacking both FSH receptors (FSHRKO) and androgen receptors on the Sertoli cell (SCARKO) to examine how FSH and androgen combine to regulate Sertoli cell function and spermatogenesis. Sertoli cell number in FSHRKO-SCARKO mice was reduced by about 50% but was not significantly different from FSHRKO mice. In contrast, total germ cell number in FSHRKO-SCARKO mice was reduced to 2% of control mice (and 20% of SCARKO mice) due to a failure to progress beyond early meiosis. Measurement of Sertoli cell-specific transcript levels showed that about a third were independent of hormonal action on the Sertoli cell, whereas others were predominantly androgen dependent or showed redundant control by FSH and androgen. Results show that FSH and androgen act through redundant, additive, and synergistic regulation of spermatogenesis and Sertoli cell activity. In addition, the Sertoli cell retains a significant capacity for activity, which is independent of direct hormonal regulation
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