Transovarial effect of novaluron: persistence and residual effects on Stephanitis pyrioides (Hemiptera: Tingidae)

2021 ◽  
pp. 1-12
Author(s):  
Shimat V. Joseph
Keyword(s):  
United States Of America ◽  
Insect Pest ◽  
Residual Activity ◽  
The United States ◽  
Insect Growth Regulator ◽  
Residual Effects ◽  
Single Application ◽  
Management Options ◽  
Significant Difference ◽  
Adult Exposure

Abstract Stephanitis pyrioides (Scott) (Hemiptera: Tingidae) is an important insect pest of azaleas, Rhododendron Linnaeus spp. (Ericaceae), in the United States of America. Because neonicotinoids, insecticides traditionally used against S. pyrioides, pose a risk to pollinators and natural enemies, nursery growers have reduced neonicotinoid use and are seeking alternative management options. Novaluron, an insect growth regulator, elicits a transovarial effect by reducing the viability of eggs after exposure to S. pyrioides adults. However, stability and persistence of transovarial effects on adults following exposure are not clear. The objectives of this study were to determine (1) the persistence of the transovarial effect of novaluron for up to three weeks after a single adult exposure and (2) the residual activity of aged novaluron residues eliciting a transovarial effect against S. pyrioides after a single application. Stephanitis pyrioides density was significantly lower in the novaluron-treated adults than in the nontreated controls for up to 21 days. The novaluron residues deposited on azalea foliage aged up to 32 days significantly reduced the number of S. pyrioides nymphs compared to that of the nontreated control. There was no significant difference in the number of nymphs among the 7-, 17-, and 32-day-old novaluron treatments relative to the nontreated control.

Direct and residual contact toxicity of insecticides toHalyomorpha halys(Hemiptera: Pentatomidae)

2019 ◽  
Vol 151 (2) ◽  
pp. 209-218 ◽  
Author(s):  
A.E. Gradish ◽  
H. Fraser ◽  
C.D. Scott-Dupree
Keyword(s):  
United States Of America ◽  
Economic Loss ◽  
The United States ◽  
Invasive Pest ◽  
Contact Toxicity ◽  
Halyomorpha Halys ◽  
Effective Management ◽  
Management Options ◽  
Horticultural Crops ◽  
Contact Exposure

AbstractHalyomorpha halys(Stål) (Hemiptera: Pentatomidae) is a serious invasive pest of many agricultural and horticultural crops in Canada and the United States of America. To mitigate economic loss for growers, effective management options forH. halysare needed. We evaluated the efficacy of 12 insecticides (Beauveria bassiana(Balsamo-Crivelli) Vuillemin (Cordycipitaceae), boric acid, chlorpyrifos, clothianidin, flupryadifurone, λ-cyhalothrin, malathion, novaluron, sulfoxaflor, thiamethoxam, thiamethoxam + λ-cyhalothrin, and thiamethoxam + novaluron) currently used or with potential forH. halysmanagement by determining their direct and residual contact toxicity toH. halysnymphs. Each insecticide was tested at its Canadian label rate and half and twice that rate. With the exception of chlorpyrifos, nymph mortality was low (< 40%) following direct or residual contact exposure to all insecticides and rates. All surviving nymphs were severely affected (i.e., knocked down) by direct and residual contact exposure to neonicotinoids, while approximately 66% of nymphs were severely affected following exposure to sulfloxaflor residues at label and twice label rate. However, few nymphs were severely affected by all other insecticides and rates. Overall, our results suggest thatH. halysis not susceptible to many insecticides at current label rates for Canada. More research is needed to identify efficacious insecticides forH. halys.

P760Clinical profile of African-American and non-Hispanic caucasian patients with Takotsubo cardiomyopathy syndrome in a large urban hospital in the United States of America

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
P Westman ◽  
K Ravindra ◽  
J Chiabrando ◽  
D Kadariya ◽  
G Maehara ◽  
...  
Keyword(s):  
United States ◽  
African American ◽  
Hospital Mortality ◽  
United States Of America ◽  
Troponin I ◽  
The United States ◽  
Stress Cardiomyopathy ◽  
Urban Hospital ◽  
Significant Difference ◽  
Caucasian Patients

Abstract Background Takotsubo (stress) cardiomyopathy is an acute reversible heart failure syndrome initially described in Japanese patients, but now well characterized in Caucasians patients in Europe or of European descent. An initial observation has suggested a lower incidence of Takotsubo in non-Caucasian subjects, particularly in the African-American (AA) population in the United States of America. The purpose of this study was to assess whether epidemiologic and clinical differences were present in Takotsubo in a large urban hospital in Virginia, USA. Methods We used an informatics-based system to query electronic health records (TriNetX, Cambridge, MA, USA) to search for cases of Takotsubo between 2010 and 2018 and a corresponding cohort of patients with non-ST segment elevation acute myocardial infarction (NSTEMI). We then performed a chart-level review of 160 cases and obtained additional clinical information including symptoms, risk factors, co-morbidities, and in-hospital outcomes. This retrospective study was approved by the Institutional Review Board of our institution. Results We identified 260 cases of Takotsubo and 6,270 of NSTEMI in the same time period (1:24, 4.2%). Being AA was associated with an odds ratio of Takotsubo versus NSTEMI of 0.38 [0.29–0.50] (P=0.0001). With further evaluation of patients with Takotsubo (N=160), AA (N=44, 27.2%) and Non-Hispanic Caucasian (C) (N=110, 67.9%) had no differences in age and sex. AA patients with Takotsubo however were more likely than C patients to be affected by type II diabetes mellitus (38.6% versus 14.5%, P=0.002, OR 3.70 [1.65–8.28]), have history of drug abuse (27.3% versus 9.1%, P=0.009, OR 3.75 [1.48–9.49]) and of cocaine use in particular (9.1% versus 0.9%, P=0.024, OR 11.0 [1.19–101.4]). The pattern of wall motion abnormality was not different between the 2 groups. AA patients presented with a lower ratio of brain natriuretic peptide (BNP) to troponin I (41.9 [12.7–258] pg./ml versus 281 [42–890] pg/ml, P=0.022). There was no significant difference of in-hospital mortality between the AA and C groups (9.1% versus 25%, respectively, OR 0.40 [0.13–1.24], P=0.11). Conclusions The incidence and clinical characteristics of Takotsubo (stress) cardiomyopathy appear to be different between African-American and Non-Hispanic Caucasian patients. African-American patients are more likely to have diabetes and illicit drug usage, but have a lower BNP/troponin I ratio. Both AA and Non-Hispanic Caucasian patients have similar in-hospital mortality.

Insect Pest Management in Postharvest Ecosystems in the United States of America

2009 ◽  
Vol 20 (6) ◽  
pp. 279-284 ◽  
Author(s):  
Frank H. Arthur ◽  
Judy A. Johnson ◽  
Lisa G. Neven ◽  
Guy J. Hallman ◽  
Peter A. Follett
Keyword(s):  
United States ◽  
Pest Management ◽  
United States Of America ◽  
Insect Pest ◽  
The United States ◽  
Insect Pest Management

scholarly journals Prevalence and Concentration of Escherichia coli O157:H7 in Cattle, Products, and the Environment in the United States of America: A Meta-Analysis Study

2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Woube Y ◽  
Abdella E ◽  
Faraj R ◽  
Perry R ◽  
Reddy G ◽  
...  
Keyword(s):  
United States ◽  
Escherichia Coli ◽  
Dairy Cattle ◽  
United States Of America ◽  
Meta Analysis ◽  
The United States ◽  
Feedlot Cattle ◽  
Escherichia Coli O157 ◽  
Pooled Prevalence ◽  
Significant Difference

Shiga toxin-producing Escherichia coli O157:H7 are bacterial pathogens that cause foodborne infections in humans. The objectives of this study were to find the pooled prevalence and concentration of Escherichia coli O157:H7 in cattle, hides, carcass, and the environment in the United States of America using meta-analysis. The PRISMA and MOOSE research protocols were employed in the methodology. Weighted effect size was calculated using MetaXL software. A total of 1737 publications were screened, out of which 53 were selected for the final analysis. The pooled prevalence in feedlot cattle was 10.96% (95% CI: 4.2-18.8%). In dairy cattle a pooled prevalence of 1.5% (95% CI: 0.11-3.5%) was observed. The prevalence between feedlot and dairy cattle was significantly different (p<0.05). The herd prevalence in combined feedlot and dairy cattle was 31.7% (95% CI: 10.2-55.5%). Hide and carcass samples’ pooled prevalences were 54.7% (95% CI: 41.7-67.5%) and 21.3% (95% CI: 9.7-34.2%), respectively. Prevalence of environmental samples was 8.1% for produce (95% CI: 0-29.6%), 4.6% for watershed and sediment samples (95% CI: 0-12.2%), and 2.4% for water taken from troughs (95% CI: 0.39-5.1%). Significant difference was observed in individual, herd, and environment prevalence between regions (χ2 =903.14, p=0.0000; χ2 =11.06, p=0.0039; χ2 =13.59, p=0.0004, respectively). E. coli O157:H7 concentrations were highest in feces (900- 300,000 cfu/g), followed by hides (5-9,800 cfu/100 square cm), and carcass (1-189 cfu/100 square cm). At least one supershedder exists in a herd. The findings in this study showed that Escherichia coli O157:H7 serotype is widespread in feedlots, herds, hides, and carcass in the United States of America necessitating appropriate measures to prevent human illnesses. Improving management programs in cattle herds, reduction of environmental contamination, and hygienic slaughter practices are targets of intervention.

scholarly journals (10) Effect of the Floating Cover on Cucumber (Cucumis sativus L.) Yield

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 1016C-1016
Author(s):  
Marcelino Bazán Tene ◽  
Javier Farías Larios ◽  
José Gerardo López Aguirre ◽  
Francisco Radillo Juárez ◽  
Jorge Rogelio Flores Sánchez
Keyword(s):  
United States ◽  
United States Of America ◽  
The United States ◽  
Cucumis Sativus L ◽  
Horticultural Crops ◽  
A Value ◽  
High Consumption ◽  
Significant Difference ◽  
The World ◽  
Beginning Of Flowering

Production of horticultural crops is important throughout the world, with high consumption mainly in Europe and the United States of America. Cucumber is consumed both fresh and processed. This vegetable generates important profits for producing countries such as Mexico, which, in 2003, produced 435,897 tons of fresh fruit with a value of 1.190 million Mexican pesos (around USD $109 million). The objective of this work was to evaluate the effect of the floating cover on the yield of fresh cucumbers. Four treatments and five repetitions were imposed in a randomized distribution: covered 20 days (C20) post-emergence, covered until beginning of flowering (CF), covered until beginning of harvest (CIC), and without cover (SC). Data at the first and fourth harvest were analyzed. Results showed that, in the first harvest, treatment C20 days was highest in fruit yield (3.11 ton/ha); Treatment CIC had 2.47 ton/ha, and SC produced 1.66 ton/ha. Data obtained in the fourth harvest, treatment C20, had the highest yield, with 24.12 ton/ha, and treatment CF had a yield of 21.11 ton/ha, but there was not significant difference (Tukey's P < 0.05).

scholarly journals Ingestion of Novaluron Elicits Transovarial Activity in Stephanitis pyrioides (Hemiptera: Tingidae)

Insects ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 216 ◽  
Author(s):  
Shimat V. Joseph
Keyword(s):  
Leaf Surface ◽  
Control Strategies ◽  
Insect Pest ◽  
Ornamental Plants ◽  
Insect Growth Regulator ◽  
Adaxial Surface ◽  
Nontarget Effects ◽  
Adaxial Leaf Surface ◽  
Significant Difference ◽  
The Usa

Azaleas (Rhododendron L. spp.) are widely grown ornamental plants in eastern and western regions of the USA. The azalea lace bug, Stephanitis pyrioides (Scott) (Hemiptera: Tingidae), is an important insect pest of azaleas. Adults and nymphs of S. pyrioides consume chlorophyll in azalea foliage, and severely affected plants appear bleached. Neonicotinoid insecticides are effective and widely used for S. pyrioides control; however, nursery growers and landscape professionals are concerned about nontarget effects on beneficial insects and demand neonicotinoid-free plants. There is clearly a need to develop reduced-risk control strategies for S. pyrioides. The insect growth regulator (IGR) novaluron elicits transovarial activity when adult S. pyrioides are exposed to it. However, it is not certain whether transovarial effects can be observed when S. pyrioides adults that colonize the abaxial leaf surface ingest novaluron residues deposited on the adaxial leaf surface. Experiments were conducted to assess transovarial activity upon exposure to various application rates of novaluron alone and novaluron with various adjuvants. The numbers of nymphs were significantly lower when the full rate of novaluron was applied on the adaxial surface of leaves compared to the number of nymphs on non-treated leaves. The densities of nymphs were not significantly different between the half and full rates of novaluron treatment. When novaluron with various adjuvants was applied to the adaxial surface of the leaves, the densities of nymphs were significantly lower under the novaluron treatments compared to the non-treated leaves, regardless of the type of adjuvant added. There was no significant difference between treatment with novaluron alone and the treatments of novaluron with adjuvants. These data show that transovarial activity was elicited in adults of S. pyrioides when novaluron was applied on the adaxial leaf surface.

scholarly journals Value Orientation Of Jamaicans Compared To Students In The United States Of America

2011 ◽  
Vol 4 (3) ◽  
Author(s):  
Barbara Dastoor ◽  
Edeta Roofe ◽  
Bahaudin Mujtaba
Keyword(s):  
United States Of America ◽  
Power Distance ◽  
Extended Period ◽  
Cultural Orientation ◽  
The United States ◽  
Value Orientation ◽  
Uncertainty Avoidance ◽  
Significant Difference ◽  
The Us ◽  
Jamaican Culture

This study investigates differences in the value orientation of Jamaican students who live and study in the US for an extended period compared to Jamaican students in Jamaica and US students to see if there is support for the theories of convergence, divergence and crossvergence given the effects of globalization on different countries. Dorfman and Howels (1988) scale, which measures Power distance, Uncertainty avoidance, Collectivism, Masculinity and Paternalism, assessed value orientation in this study. The results reveal that there are no differences between Jamaican students in Jamaica and those in the US that suggests strength in the Jamaican culture as Jamaicans live in the US. However, there was only one significant difference between Jamaican students in the US and the US students; uncertainty avoidance was significantly higher for the former. This supports divergend or retaining ones distinctive cultural orientation despite ongoing interaction over time. There was no difference between US students, Jamaicans in US and Jamaican universities on all other dimensions. This lends support to convergence or merging of cultures.

scholarly journals Effect of Insecticide Drench Applications on Western Flower Thrips, Frankliniella occidentalis, Pupae in Growing Media

HortScience ◽  
2019 ◽  
Vol 54 (5) ◽  
pp. 890-895 ◽  
Author(s):  
Yinping Li ◽  
Raymond A. Cloyd ◽  
Nora M. Bello
Keyword(s):  
Frankliniella Occidentalis ◽  
Insect Pests ◽  
Residual Activity ◽  
Western Flower Thrips ◽  
Insect Growth Regulator ◽  
Water Control ◽  
Growing Media ◽  
Flower Thrips ◽  
Significant Difference ◽  
Untreated Check

Western flower thrips, Frankliniella occidentalis, is one of the most destructive insect pests of greenhouse-grown horticultural crops. The primary method of managing western flower thrips populations involves applications of insecticides; however, there is no information associated with the effect of the insect growth regulator, pyriproxyfen, or the entomopathogenic fungus, Isaria fumosorosea, on western flower thrips pupae in growing media. Therefore, four laboratory experiments were conducted to determine the effect of pyriproxyfen and I. fumosorosea applied as a drench to growing media on western flower thrips pupae. Expt. 1 evaluated the efficacy of pyriproxyfen and I. fumosorosea on western flower thrips pupae. Based on the results from Expt. 1, Expt. 2 assessed the effect of pyriproxyfen in two growing media (LC1 and BM1) on western flower thrips pupae. Expts. 3 and 4 determined the residual activity of pyriproxyfen in growing media on western flower thrips pupae 3, 5, 7, and 14 days after treatments were applied. The pyriproxyfen treatment resulted in a significantly lower estimated mean probability of western flower thrips adults captured on yellow sticky cards (17%) compared with the water control (59%), untreated check (88%), and two I. fumosorosea treatments (46% for 1.0 g and 41% for 2.0 g of Ancora) in Expt. 1. However, for the two growing media in Expt. 2, the estimated mean probability of western flower thrips adults captured on yellow sticky cards was not significantly different between the pyriproxyfen treatment (LC1 = 15%; BM1 = 12%) and the water control (LC1 = 41%; BM1 = 24%). For either the pyriproxyfen treatment or the untreated check, there was no evidence of a significant difference between the two growing media on the estimated mean probability of western flower thrips adults captured on yellow sticky cards. Furthermore, there was no evidence of any residual activity 3 days after drench applications of pyriproxyfen. The results of the study have demonstrated that drench applications of pyriproxyfen are not affecting survival of western flower thrips pupae.

Registration of wildlife contraceptives in the United States of America, with OvoControl and GonaCon immunocontraceptive vaccines as examples

2008 ◽  
Vol 35 (6) ◽  
pp. 586 ◽  
Author(s):  
Kathleen A. Fagerstone ◽  
Lowell A. Miller ◽  
John D. Eisemann ◽  
Jeanette R. O'Hare ◽  
James P. Gionfriddo
Keyword(s):  
United States ◽  
United States Of America ◽  
Environmental Protection Agency ◽  
Disease Transmission ◽  
Regulatory Authority ◽  
The United States ◽  
Research Center ◽  
Management Options ◽  
Contraceptive Agents ◽  
The Us

Overabundant wildlife populations have the potential to adversely affect wildlife habitats or pose risks to human health and safety through disease transmission and collisions with vehicles and aircraft. Traditional methods for reducing overabundant wildlife, such as hunting and trapping, are often restricted or infeasible in urban and suburban areas. Additional management options are needed. For the past 15 years, scientists with the US Department of Agriculture’s (USDA) Wildlife Services’ National Wildlife Research Center have been developing and testing contraceptive agents. This research has resulted in the development of several reproductive inhibitors and has forced regulatory bodies to determine where the regulatory authority for wildlife contraceptives will reside. The regulatory authority for contraceptives for wildlife and feral animals has recently been moved from the US Food and Drug Administration (FDA) to the US Environmental Protection Agency (EPA). The first contraceptive registered by the EPA since this move was OvoControl-G for reducing the hatchability of Canada goose eggs. OvoControl was registered in 2005 by Innolytics, LLC working in cooperation with the National Wildlife Research Center. A similar product, OvoControl-P, was registered in 2007 as a contraceptive technique for pigeons. Another product developed by the National Wildlife Research Center, GonaCon immunocontraceptive vaccine, is in the registration process for managing white-tailed deer populations. This manuscript will describe the products that have been and are currently undergoing registration as contraceptives in the United States of America, and the data required for those products.

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