scholarly journals Reduced Midseason Pesticide Program for Control of Scab and Plum Curculio in Peach

Plant Disease ◽  
2003 ◽  
Vol 87 (6) ◽  
pp. 699-706 ◽  
Author(s):  
Z. Lan ◽  
H. Scherm ◽  
D. L. Horton
Keyword(s):  
United States ◽  
Southeastern United States ◽  
The Other ◽  
Application Time ◽  
Conotrachelus Nenuphar ◽  
Plum Curculio ◽  
Nontarget Effects ◽  
And Control ◽  
Preharvest Interval ◽  
Environmental Impact Quotient

Risks to peach production from scab (caused by Cladosporium carpophilum) and plum curculio (Conotrachelus nenuphar), two key pests in the southeastern United States, are high until 2 months past petal fall and then decreases during midseason. This suggests that reduced-input pesticide strategies may effectively control both pests during the latter period. In this study, we evaluated midseason pesticide applications according to an alternate-row middle (ARM) spray program in which sprays were applied only to every other tree row while reducing tractor speed and keeping application intervals unchanged relative to conventional spraying of both sides of the trees. In a 2-year trial in a research orchard, conventional sprays of fungicide (primarily sulfur) and insecticide (primarily phosmet) were applied at 10- to 14-day intervals until first cover, followed by continued conventional sprays of fungicide and insecticide (standard), conventional sprays of one pesticide together with ARM sprays of the other pesticide, or combined ARM sprays of both pesticides. Schedules with midseason ARM sprays of both pesticides also were evaluated in two commercial orchards in 2 years. In all experiments, plots receiving combined ARM sprays were equivalent to the standard in fruit quality and control of scab and plum curculio. Combined ARM spraying resulted in lower environmental nontarget effects (as estimated by the Environmental Impact Quotient) and reduced application time by 25 to 33% for each midseason spray and 12.5 to 18.5% for the entire period from petal fall to the preharvest interval.

Growth and Development of Wild Poinsettia (Euphorbia heterophylla) Selections in Peanut (Arachis hypogaea)

Weed Science ◽  
1996 ◽  
Vol 44 (3) ◽  
pp. 575-578 ◽  
Author(s):  
Barry J. Brecke ◽  
Piotr Tobola
Keyword(s):  
United States ◽  
Leaf Area ◽  
Growth And Development ◽  
Baton Rouge ◽  
Southeastern United States ◽  
Light Attenuation ◽  
Growing Season ◽  
The Other ◽  
Yield Reduction ◽  
Dry Biomass

Wild poinsettia is a serious weed in several crops, including peanut, grown in the southeastern United States. A study was conducted over 3 yr at Jay, FL, to characterize the growth and development of wild poinsettia grown from seed collected at Plains, GA; Marianna, FL; and Baton Rouge, LA. Seedlings from each selection were transplanted to the field and were grown either alone or in competition with peanut. Observations made throughout the growing season indicated that the Louisiana selection flowered later, grew to a larger size, produced more leaf area and biomass, and caused greater light attenuation and peanut yield reduction than the other two selections. The Georgia selection produced the smallest plants, least leaf area and biomass, and was least competitive with peanut. The Florida selection was intermediate for these parameters. Wild poinsettia dry biomass production was reduced by 78 to 83% when grown with peanut compared with monoculture wild poinsettia.

scholarly journals Examination of the Predictability of Nocturnal Tornado Events in the Southeastern United States

2019 ◽  
Vol 34 (2) ◽  
pp. 467-479 ◽  
Author(s):  
Ryan C. Bunker ◽  
Ariel E. Cohen ◽  
John A. Hart ◽  
Alan E. Gerard ◽  
Kim E. Klockow-McClain ◽  
...  
Keyword(s):  
United States ◽  
Predictive Power ◽  
Meteorological Parameters ◽  
Southeastern United States ◽  
Time Frame ◽  
Assessment Model ◽  
The Other ◽  
Risk Assessment Model ◽  
Multiple Parameters ◽  
Effective Layer

Abstract Tornadoes that occur at night pose particularly dangerous societal risks, and these risks are amplified across the southeastern United States. The purpose of this study is to highlight some of the characteristics distinguishing the convective environment accompanying these events. This is accomplished by building upon previous research that assesses the predictive power of meteorological parameters. In particular, this study uses the Statistical Severe Convective Risk Assessment Model (SSCRAM) to determine how well convective parameters explain tornado potential across the Southeast during the months of November–May and during the 0300–1200 UTC (nocturnal) time frame. This study compares conditional tornado probabilities across the Southeast during November–May nocturnal hours to those probabilities for all other November–May environments across the contiguous United States. This study shows that effective bulk shear, effective storm-relative helicity, and effective-layer significant tornado parameter yield the strongest predictability for the November–May nocturnal Southeast regime among investigated parameters. This study demonstrates that November–May southeastern U.S. nocturnal predictability is generally similar to that within other regimes across the contiguous United States. However, selected ranges of multiple parameters are associated with slightly better predictability for the nocturnal Southeast regime. Additionally, this study assesses conditional November–May nocturnal tornado probabilities across a coastal domain embedded within the Southeast. Nocturnal coastal tornado predictability is shown to generally be lower than the other regimes. All of the differences highlight several forecast challenges, which this study analyzes in detail.

scholarly journals Racial disparities in the prevalence and control of hypertension among a cohort of HIV-infected patients in the southeastern United States

PLoS ONE ◽  
2018 ◽  
Vol 13 (3) ◽  
pp. e0194940 ◽  
Author(s):  
Greer A. Burkholder ◽  
Ashutosh R. Tamhane ◽  
Monika M. Safford ◽  
Paul M. Muntner ◽  
Amanda L. Willig ◽  
...  
Keyword(s):  
United States ◽  
Racial Disparities ◽  
Southeastern United States ◽  
And Control

scholarly journals A Review of the Biology, Ecology, and Management of Plum Curculio (Coleoptera: Curculionidae)

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Timothy P Lampasona ◽  
Cesar Rodriguez-Saona ◽  
Tracy C Leskey ◽  
Anne L Nielsen
Keyword(s):  
Management Practices ◽  
Management Strategies ◽  
The United States ◽  
Conotrachelus Nenuphar ◽  
Future Directions ◽  
Geographic Ranges ◽  
Plum Curculio ◽  
Fruit Abortion ◽  
Chemical Inputs ◽  
And Control

Abstract The plum curculio, Conotrachelus nenuphar Herbst (Coleoptera: Curculionidae), is an insect native to the Americas that is a serious pest of stone and pome fruits in the United States and Canada. Failure to effectively manage this insect may result in up to 85% damaged fruit at harvest, as well as early season fruit abortion. Conotrachelus nenuphar is oligophagous, feeding and ovipositing on many Rosaceous plants, including apple, peach, plum, cherry, quince, and pear. Additionally, C. nenuphar in limited geographic ranges utilizes alternate hosts such as highbush blueberry (Ericaceae) and Muscadine grape (Vitaceae). Despite its long history as a pest, integrated pest management (IPM) lags behind similarly damaging native fruit pests. Although significant progress has been made on the identification of attractive lures for monitoring C. nenuphar adults, development of behaviorally based management strategies, and biological control with entomopathogenic nematodes, growers continue to rely heavily on top-down chemical inputs to manage this pest. Most of the research to date comes from studies done in apples where alternative management practices for C. nenuphar have, to some extent, been adopted; however, less IPM-based information is available for other susceptible crops. In this review, we summarize the history, biology, ecology, behavior, and control of C. nenuphar and future directions for IPM research.

scholarly journals Performance of North American Strawberry Cultivars under Conditions Mimicking California Production Systems

1994 ◽  
Vol 119 (5) ◽  
pp. 1034-1038 ◽  
Author(s):  
John M. Rariden ◽  
Douglas V. Shaw
Keyword(s):  
United States ◽  
Variance Components ◽  
Production Systems ◽  
Southeastern United States ◽  
Total Yield ◽  
The Other ◽  
Phenotypic Variance ◽  
Growth Attributes ◽  
Geographic Regions ◽  
Strawberry Cultivars

Runner plants from 16 strawberry (Fragaria ×ananassa Duch.) cultivars were grown using annual Mediterranean production systems to test for differences in productivity, performance traits, and vegetative growth attributes. Genotypes were included from germplasm adapted to four geographic regions: California and northwestern, northeastern, and mid-Atlantic or southeastern United States. The California genotypes were divided further into day-neutral and June-bearing categories. With these treatments, California cultivars had significantly larger plants and grew more rapidly during the fall and winter, had larger fruit, and produced at least twice the quantity of fruit of cultivars from the other regions. Variance components due to region explained 64% and 26% of the phenotypic variance for early and total yield, respectively, whereas differences among cultivars within regions explained 12% and 7% of the variance for these traits. Cultivars from all regions had significantly larger plants and were more productive when treated with 3 weeks of artificial vernalization. However, region × vernalization effects were nonsignificant for all traits, a result suggesting that selection in Mediterranean environments has not adapted germplasm specifically for low vernalization conditions.

Scanning electron microscopy of three types of ectomycorrhizae formed on Eucalyptus nova-anglica in the southeastern United States

1981 ◽  
Vol 59 (5) ◽  
pp. 683-688 ◽  
Author(s):  
R. W. Rose Jr. ◽  
C. Gerald Van Dyke ◽  
C. B. Davey
Keyword(s):  
Electron Microscopy ◽  
United States ◽  
Scanning Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Southeastern United States ◽  
The Other ◽  
Cenococcum Geophilum ◽  
Different Types ◽  
Scanning Electron

Three different types of ectomycorrhizae found in the Southeastern United States on Eucalyptus nova-anglica and identified as being formed by Cenococcum geophilum, Pisolithus tinctorius, and Scleroderma geaster were examined with a scanning electron microscope (SEM). In overall appearance the three types of mycorrhizae could be distinguished easily from each other, particularly C. geophilum, which had a relatively smooth, undulate surface in comparison with the other two types. Detailed descriptions and comparisons of these ectomycorrhizae are given and the value of SEM in characterizing ectomycorrhizae is discussed

scholarly journals Soiling Comparison of Mirror Film and Glass Concentrating Solar Power Reflectors in Southwest Louisiana

2021 ◽  
Vol 13 (10) ◽  
pp. 5727
Author(s):  
Kenneth Ritter Ritter ◽  
Albert McBride ◽  
Terrence Chambers
Keyword(s):  
Thin Film ◽  
United States ◽  
Solar Power ◽  
Specular Reflection ◽  
Southeastern United States ◽  
The Other ◽  
Concentrating Solar Power ◽  
Two Generations ◽  
Average Loss ◽  
Reflective Surfaces

Soiling effects influence the output of solar thermal plants, significantly causing unwanted transmittance, reflectance, and absorbance losses. Research is needed to identify what type of reflective surfaces are best suited for semitropical climates, such as the southeastern United States. This paper initially presents a review of several concentrating solar power (CSP) reflector testbeds used to analyze the soiling effects of various reflective materials. A soiling testbed is developed for this study that comprised six sets of reflective surfaces mounted at a fixed tilt of 30 degrees: three sets of thin-film surfaces and three sets of glass types. Two generations of 3M solar mirror film (SMF), 3M SMF 1100 and 3M SMF 2020, were used along with Konica Minolta SMF, silvered Corning Willow Glass, a dichroic cold mirror, and a standard mirror. Results show that the 3M SMF 2020 and Konica Minolta SMF performed the best during regular cleaning intervals, whereas the silvered Corning Willow Glass gave the best performance if only cleaned naturally. The other glass types showed the least average loss due to soiling throughout this study but gave the lowest performance for specular reflection.

Host-tree-related differences in trap captures and electroantennogram activity of Conotrachelus nenuphar (Coleoptera: Curculionidae)

2010 ◽  
Vol 142 (3) ◽  
pp. 284-293 ◽  
Author(s):  
Tracy C. Leskey ◽  
Torri J. Hancock ◽  
Starker E. Wright
Keyword(s):  
North America ◽  
Malus Domestica ◽  
The Other ◽  
Stone Fruit ◽  
Eastern North America ◽  
Conotrachelus Nenuphar ◽  
Plum Curculio ◽  
Active Season ◽  
Prunus Salicina ◽  
Pome Fruits

AbstractThe plum curculio, Conotrachelus nenuphar (Herbst), is a serious pest of stone and pome fruits (Rosaceae) in eastern North America. We recorded captures of adult plum curculios in the field and measured electroantennogram (EAG) activity in the laboratory associated with cultivars of four hosts, ‘Formosa’ Japanese plum (Prunus salicina Lindl.), ‘Stanley’ European plum (P. domestica L.), ‘Empire’ apple (Malus domestica Borkh.), and ‘Loring’ peach (P. persica (L.) Batsch) (Rosaceae) to determine whether hosts that may be attractive to the plum curculio under field conditions also elicit positive EAG responses. Trap captures of adults on ‘Formosa’ plum were significantly greater than on any other host, and corresponding headspace extracts also produced strong EAG responses throughout the active season. ‘Stanley’ plum and ‘Loring’ peach, the other stone-fruit hosts included in the study, elicited strong EAG responses throughout the season, although trap captures associated with these hosts were generally not as high as for ‘Formosa’ plum. Throughout the season, trap captures of adults were significantly lower for ‘Empire’ apple than for ‘Formosa’ plum, and EAG responses were much lower than for all stone-fruit hosts. Our results indicate that volatiles from ‘Formosa’ plum likely contain uniquecompounds or are comprised of ratios of stimulating compounds that make it much more attractive to plum curculio in the field.

scholarly journals Post-gay, Political, and Pieced Together: Queer Expectations of Straight Allies

2019 ◽  
Vol 63 (1) ◽  
pp. 159-176
Author(s):  
TehQuin D. Forbes ◽  
Koji Ueno
Keyword(s):  
United States ◽  
Social Change ◽  
Southeastern United States ◽  
Past Research ◽  
Public University ◽  
The Other ◽  
Personal Lives ◽  
Queer People ◽  
The Individual ◽  
Depth Interviews

Past research has examined straight allyship to the queer community from allies’ perspectives, but little is known about how queer people evaluate straight allies. Drawing on in-depth interviews with 20 LGBTQ+ (lesbian, gay, bisexual, transgender, and queer) students from a large, public university in the southeastern United States, we show that respondents formulate their expectations by leaning on their understanding of their own queerness in relation to other privileged and marginalized identities they possess. We find two opposing camps of thought: one that allies should be attuned to the individual needs of queer people in their personal lives, and the other that they should be actively dedicated to supporting the broader queer community. Some respondents expressed sentiments of both camps, showcasing how expectations range with diverse identity constellations. We conclude with discussions of how diverse expectations complicate allyship as a vehicle for social change, and the implications of these results for allies’ roles in queer rights movements.

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