Discovery of a major QTL for resistance to the guava root-knot nematode (Meloidogyne enterolobii) in 'Tanzania', an African landrace sweetpotato (Ipomoea batatas).

Sweetpotato, Ipomoea batatas (L.) Lam. (2n = 6x = 90), is among the world's most important food crops and is North Carolina's most important vegetable crop.

A Comparison of Three Automated Root-Knot Nematode Egg Counting Approaches Using Machine Learning, Image Analysis, and a Hybrid Model.

spp. (root-knot nematodes [RKNs]) are a major threat to a wide range of agricultural crops worldwide. Breeding crops for RKN resistance is an effective management strategy, yet assaying large numbers of breeding lines requires laborious bioassays that are time-consuming and require experienced researchers.

Occurrence and Distribution of spp. in Fields Rotated with Sweetpotato and Host Range of a North Carolina Population of .

Root-knot nematodes (RKNs, spp.) are some of the most economically important and common plant parasitic nematodes in North Carolina (NC) cropping systems. Soil samples collected from fields planted with crops rotated with sweetpotato ( [L.

Evaluation of Weed Species for Host Status to the Root-Knot Nematodes and Race 4.

Weeds that compete with valuable crops can also host plant-parasitic nematodes, acting as a source of nematode inoculum in a field and further damaging crops. The host status of 10 weed species commonly found in North Carolina, USA, was determined for the root-knot nematodes and race 4 in the greenhouse. Each weed species was challenged with 5,000 eggs/plant of either or race 4, with five replicate plants per treatment in two separate greenhouse trials.

Evaluation of Soybean Genotypes ( and ) for Resistance to the Root-Knot Nematode, .

Potential resistance to the root-knot nematode (RKN) in 72 and 44 soybean genotypes was evaluated in greenhouse experiments. Approximately 2,500 eggs of were inoculated on each soybean genotype grown in a steam sterilized 1:1 sand to soil mixture. Sixty days postinoculation, plants were destructively harvested to determine the host status.

Reaction of Winter Cover Crops to and Glasshouse Bioassay for Evaluating Utility in Managing in Soybeans.

is an invasive and highly aggressive root-knot nematode pathogen impacting the Southeastern United States. Winter cover cropping may be a cost-effective method for reducing populations of in between summer cash crops, yet a gap in the knowledge remains about the response of these cover crops to and their utility in suppressing nematode populations prior to a cash crop. A "two-step" glasshouse bioassay was performed to evaluate eight winter cover crops popular in North Carolina for their direct response to infection, and to quantify their effect in reducing nematode populations for the following soybean plants.

Cardiorespiratory fitness, body mass index, cardiovascular disease, and mortality in young men: A cohort study.

Objective: We examined the association between cardiorespiratory fitness (CRF), body mass index (BMI), incidence of major acute cardiovascular events (MACE), and all-cause mortality (ACM).

Methods: We conducted a retrospective cohort study involving 212,631 healthy young men aged 16 to 25 years who had undergone medical examination and fitness testing (2.4 km run) from 1995 to 2015.

Transiting Out of Full-Time National Service: A Qualitative Study of Barriers and Motivators of Weight Change in Young Adult Men in Singapore.

Higher prevalence of obesity in men compared with women, particularly among those 18 to 40 years of age, has been observed in Singapore. We explored young men's perceptions of weight change after transiting out of National Service (NS) over a 12-month period and sought to understand the underlying drivers. In-depth interviews, guided by the Health Belief Model (HBM), were conducted with young men 12 months after they had completed full-time NS.

Active Use and Engagement in an mHealth Initiative Among Young Men With Obesity: Mixed Methods Study.

Background: The effectiveness of mobile health (mHealth) approaches that employ wearable technology to promote physical activity have been the subject of concern due to the declining active use observed in trial settings.

Objective: To better contextualize active use, this study aimed to identify the barriers and enablers to engagement in a tracker-based mHealth initiative among young men who had recently completed a 19-week residential weight loss program.

Methods: A mixed methods study was conducted among 167 young men who had voluntarily enrolled in the national steps challenge (NSC), an mHealth physical activity promotion initiative, following a residential weight loss intervention.

Influence of glass formers and glass modifiers on spectral properties and CIE coordinates of Dy ions in lead-free borate glasses.

Spectral properties of lead-free glasses doped with Dy ions in function of glass formers and glass modifiers were studied. The glass systems in a function of concentration GeO and CaO/SrO/BaO which was partially or totally replaced by CaF/SrF/BaF were synthesized. The visible luminescence spectra for obtained glasses were registered and value of parameters such as ratio of yellow-to-blue luminescence and the Commission Internationale de I'Eclairage (CIE) chromaticity coordinates (x, y) were analyzed in detail.

Can Eucalyptol Replace Antibiotics?

One of the primary reasons for the search for new antimicrobial agents is the increasing and spreading resistance of microorganisms to previously used drugs. This is particularly important in the case of rapidly progressing infections that require the rapid administration of an appropriately selected antibiotic. However, along with the administration of antibiotics, complications in the disease-weakened body may arise in the form of systemic mycoses, viral infections, and protozoan infections.

Motivations to exercise in young men following a residential weight loss programme conducted in National Service - a mixed methods study.

Background: Physical activity is a critical component of lifestyle interventions to reduce body weight and maintain weight loss. The goal of this study was to examine the motivations to exercise in young men following a 5-month residential weight loss programme conducted in the Singapore military as part of National Service.

Methods: We conducted a sequential mixed methods study starting with three focus groups comprising 21 programme instructors.

, a Major Threat to Tomato Production: Current Status and Future Prospects for Its Management.

The guava root-knot nematode, (Syn. ), is an emerging pathogen to many crops in the world. This nematode can cause chlorosis, stunting, and reduce yields associated with the induction of many root galls on host plants.

SARS-CoV-2 in migrant worker dormitories: Geospatial epidemiology supporting outbreak management.

Background: Migrant worker dormitories-residential complexes where 10-24 workers share living spaces-account for the majority of cases of SARS-CoV-2 infection in Singapore. To prevent overspill of transmission to the wider population, starting in early April 2020, residents were confined to their dormitories while measures were put in place to arrest the spread of infection. This descriptive study presents epidemiological data for a population of more than 60 000 migrant workers living in two barracks-style and four apartment-style dormitories located in western Singapore from April 3 to June 10, 2020.

Lead Borate Glasses and Glass-Ceramics Singly Doped with Dy for White LEDs.

In this paper, some series of lead borate glasses and glass ceramics singly doped with Dy ions were prepared and then studied using spectroscopic techniques. Our research includes mainly studies of the luminescence properties of received materials for white light. The luminescence bands associated with the characteristic F→H (blue), F→H (yellow) and F→H (red) transitions of trivalent dysprosium in lead borate systems are well observed.

A Mobile Health Team Challenge to Promote Stepping and Stair Climbing Activities: Exploratory Feasibility Study.

Background: Mobile health (mHealth) approaches are growing in popularity as a means of addressing low levels of physical activity (PA).

Objective: This study aimed to determine the validity of wearables in measuring step count and floor count per day and assess the feasibility and effects of a 6-week team challenge intervention delivered through smartphone apps.

Methods: Staff and students from a public university were recruited between 2015 and 2016.

Metabolic profiles in the course of the shikimic acid pathway of Raphanus sativus var. longipinnatus exposed to mesotrione and its degradation products.

The influence of pesticides on the metabolism of edible plants has not been fully investigated. Moreover, once introduced into the environment, pesticides are degraded to many compounds with undefined bioactivity. In presented work, under experimental conditions, model edible plant (Raphanus sativus var.

Development of a Species-Specific PCR for Detection and Quantification of in Soil Using the Root-Knot Nematode Effector Gene.

The Northern root-knot nematode () is an important soilborne pathogen of numerous agricultural crops in temperate regions. Accurate detection and quantification is vital to supporting informed pest management decisions. However, traditional methods of manual nematode extraction and morphology-based identification are time-consuming and require highly specialized training.

Spatiotemporal Attributes and Crop Loss Associated with Tan Spot Epidemics in Baby Lima Bean in New York.

Tan spot, caused by the pycnidial fungi Didymella americana and Boeremia exigua var. exigua, is a foliar disease affecting processing baby lima bean production in New York. Tan spot epidemics are prevalent, occur annually, and may result in substantial defoliation.

Birth Weight and Risk of Type 2 Diabetes Mellitus, Cardiovascular Disease, and Hypertension in Adults: A Meta-Analysis of 7 646 267 Participants From 135 Studies.

Background Low birth weight has been associated with increased risk of type 2 diabetes mellitus, cardiovascular disease, and hypertension, but the risk at high birth weight levels remains uncertain. This systematic review and meta-analysis aimed to clarify the shape of associations between birth weight and aforementioned diseases in adults and assessed sex-specific risks. Methods and Results We systematically searched PubMed, EMBASE , and Web of Science for studies published between 1980 and October 2016.

Rare earth-doped barium gallo-germanate glasses and their near-infrared luminescence properties.

Near-infrared luminescence properties of Nd and Ho ions in barium gallo-germanate glasses have been reported. Several spectroscopic parameters for Nd and Ho ions have been determined from the Judd-Ofelt analysis and absorption/luminescence measurements. Quite large luminescence lifetime, quantum efficiency and stimulated emission cross-section have been obtained for the main F → I (Nd) and I → I (Ho) laser transitions of rare earths in barium gallo-germanate glasses.

Spectroscopy and energy transfer in lead borate glasses doubly doped with Tm and Dy ions.

Lead borate glasses singly and doubly doped with Tm and Dy were prepared by traditional melt-quenching technique. The emission spectra of rare earths in studied glass systems were registered under different excitation wavelengths. The observed emission bands are located in the visible spectral region.

Fitbit Charge HR Wireless Heart Rate Monitor: Validation Study Conducted Under Free-Living Conditions.

Background: Many modern smart watches and activity trackers feature an optical sensor that estimates the wearer's heart rate. Recent studies have evaluated the performance of these consumer devices in the laboratory.

Objective: The objective of our study was to examine the accuracy and sensitivity of a common wrist-worn tracker device in measuring heart rates and detecting 1-min bouts of moderate to vigorous physical activity (MVPA) under free-living conditions.

Spatiotemporal spread of grapevine red blotch-associated virus in a California vineyard.

Grapevine red blotch-associated virus (GRBaV), the causative agent of red blotch disease, is a member of the genus Grablovirus, in the family Geminiviridae and the first known geminivirus of Vitis spp. Limited information is available on the epidemiology of red blotch disease. A 2-hectare Vitis vinifera cv.