scholarly journals An eco-friendly way to protect wheat seeds from phytopathogens

2022 ◽  
Vol 354 (11-12) ◽  
pp. 129-133
Author(s):  
A. Yu. Kekalo
Keyword(s):  
Root Rot ◽  
Wheat Root ◽  
Field Trials ◽  
Seed Dressing ◽  
Mixed Use ◽  
Combined Use ◽  
Pesticide Load ◽  
High Level ◽  
And Control ◽  
Wheat Seeds

Protecting wheat seed from phytopathogens is a popular topic for plant breeders. The objects requiring close attention and control on wheat are smut infections, pathogens of root rot. And if the pathogens of smut we have learned to fight quite effectively with, then microorganisms that infect underground parts of plants are controlled with less success and many questions in the system of protection against them remain controversial. The issue of reducing the pesticide load on agrocenoses, starting with the protection of seeds, also remains relevant. The article presents the results of field trials of means of protecting spring wheat seeds from root rot in 2019–2020, carried out within the framework of the state assignment at the Kurgan SRIA — branch of FSBSI UrFASRC, according to generally accepted methods. The aim of the research was to assess the biological, economic efficiency of the combined use of a chemical seed dressing agent and a biofungicide based on Bacillus subtilis in protecting wheat from soil-seed infections, to determine the competitiveness of an ecologized method of protecting seeds (reduced consumption rate of a chemical seed dressing agent in combination with biological fungicide). The obtained research results indicate that with a high level of damage to wheat by root rot (Fusarium, B. sorokiniana), the use of seed treatment with the studied preparations ensured the preservation of 10–12% of the yield, more efficiency was noted in the variants with the Oplot 0.5 l/t and the Oplot 0.3 l/t + Nodix Premium 0.3 l/t . The technical effectiveness of fungicides against wheat root rot ranged 44% for Nodix Premium to 85–86% for chemical protection and mixed use. An environmentally friendly method of protecting wheat seeds, which consists in using a 40% lower rate of a chemical dressing agent with a biopesticide, turned out to be competitive.

scholarly journals Response of Dry Bean Genotypes to Fusarium Root Rot, Caused by Fusarium solani f. sp. phaseoli, Under Field and Controlled Conditions

Plant Disease ◽  
2008 ◽  
Vol 92 (8) ◽  
pp. 1197-1200 ◽  
Author(s):  
V. N. Bilgi ◽  
C. A. Bradley ◽  
S. D. Khot ◽  
K. F. Grafton ◽  
J. B. Rasmussen
Keyword(s):  
Fusarium Solani ◽  
Root Rot ◽  
Field Trials ◽  
Growth Chamber ◽  
Fusarium Root Rot ◽  
Dry Bean ◽  
Layer Method ◽  
Red Kidney Bean ◽  
Positive Correlations ◽  
High Level

Fusarium root rot of dry bean (Phaseolus vulgaris), caused by Fusarium solani f. sp. phaseoli, is a major yield-limiting disease in North Dakota and Minnesota. Although a few sources of partial resistance are available, most commercial cultivars grown in this region are susceptible, especially in the red kidney bean market class. This study evaluated three methods of screening for resistance to Fusarium root rot. A sand-cornmeal inoculum layer method, spore suspension method, and paper towel method were used to evaluate 11 dry bean genotypes for resistance to Fusarium root rot under growth-chamber conditions. These same genotypes were also evaluated in field trials at Fargo, ND, and Park Rapids and Perham, MN, in 2005. In all trials, the small red genotype VAX 3 was found to have a consistently high level of resistance to Fusarium root rot and could be used as a source of resistance by dry bean breeders. Correlation analyses between field and growth-chamber root rot ratings indicated that all three growth-chamber methods had significantly (P ≤ 0.05) positive correlations with field results from Perham and Fargo, which suggests that all three methods could be used to screen germplasm efficiently for resistance to Fusarium root rot.

scholarly journals INFLUENCE OF SEED TREATMENT AND VARIETY ON PLANTS DAMAGE OF SPRING BY ROOT ROTS

2020 ◽  
Vol 14 (4) ◽  
pp. 16-19
Author(s):  
Aleksey Balykin ◽  
Leonid Shashkarov
Keyword(s):  
Powdery Mildew ◽  
Spring Wheat ◽  
Root Rot ◽  
Seed Treatment ◽  
Treatment Control ◽  
Root Rots ◽  
Seed Dressing ◽  
Chuvash Republic ◽  
Wheat Seeds

The article discusses the issues of root rot, leaf and stem diseases (septoria, powdery mildew, rust) during tillering-exiting the tube, fusarium and smut during heading, depending on varietal characteristics and seed dressing in the conditions of the Chuvash Republic. Margarita, Simbirtsit and Prokhorovka varieties were studied. The second factor is seed treatment in three grades: 1. Without treatment (control one). 2. Seed treatment with Benlat. 3. Seed treatment with Nano-Gro. The results of the analysis of lesions by root rot, leaf and stem diseases (septoria, powdery mildew, rust) during tillering-exiting the tube, fusarium and smut during heading are presented. The effect of Nano-Gro in combination with the seed dresser Benlat was also studied. It has been shown that pre-sowing treatment of wheat seeds with Nano-Gro solution helps to reduce damage by root rot, leaf and stem diseases (septoria, powdery mildew, rust) during tillering-exiting the tube, fusarium and smut during ear formation in spring wheat.

Non-Communicable Diseases and Global Health Politics

2019 ◽  
pp. 626-659
Author(s):  
Roger Magnusson
Keyword(s):  
Respiratory Diseases ◽  
Communicable Diseases ◽  
World Health ◽  
Global Response ◽  
Non Communicable Diseases ◽  
Health Politics ◽  
Chronic Respiratory Diseases ◽  
Health Organization ◽  
High Level ◽  
And Control

Non-communicable diseases (NCDs), including cardiovascular disease, cancer, chronic respiratory diseases, and diabetes, are responsible for around 70 percent of global deaths each year. This chapter describes how NCDs have become prevalent and critically evaluates global efforts to address NCDs and their risk factors, with a particular focus on the World Health Organization (WHO) and United Nations (UN) system. It explores the factors that have prevented those addressing NCDs from achieving access to resources and a priority commensurate with their impact on people’s lives. The chapter evaluates the global response to NCDs both prior to and since the UN High-Level Meeting on Prevention and Control of Non-communicable Diseases, held in 2011, and considers opportunities for strengthening that response in future.

scholarly journals Boundaryless working hours and recovery in Germany

2021 ◽  
Author(s):  
Laura Vieten ◽  
Anne Marit Wöhrmann ◽  
Alexandra Michel
Keyword(s):  
Working Hours ◽  
Working Time ◽  
Overtime Work ◽  
Psychological Detachment ◽  
Representative Study ◽  
Flexible Working ◽  
Recovery Experiences ◽  
High Level ◽  
And Control ◽  
Extended Work

Abstract Objective Due to recent trends such as globalization and digitalization, more and more employees tend to have flexible working time arrangements, including boundaryless working hours. The aim of this study was to investigate the relationships of various aspects of boundaryless working hours (overtime, Sunday work, and extended work availability) with employees’ state of recovery. Besides, we examined the mediating and moderating role of recovery experiences (psychological detachment, relaxation, mastery, and control) in these relationships. Methods We used data from 8586 employees (48% women; average age of 48 years) who took part in the 2017 BAuA-Working Time Survey, a representative study of the German working population. Regression analyses were conducted to test main effects as well as mediation and moderation. Results Overtime work, Sunday work, and extended work availability were negatively related to state of recovery. Psychological detachment mediated these relationships. Furthermore, we found that relaxation and control mediated the association between extended work availability and state of recovery. However, no relevant moderating effects were found. Conclusions Altogether, our findings indicate that various aspects of boundaryless working hours pose a risk to employees’ state of recovery and that especially psychological detachment is a potential mechanism in these relationships. In addition, the results suggest that a high level of recovery experiences cannot attenuate these negative relationships in leisure time. Therefore, employers and employees alike should try to avoid or minimize boundaryless working hours.

scholarly journals Molecular epidemiology of coxsackievirus A16 circulating in children in Beijing, China from 2010 to 2019

2021 ◽  
Author(s):  
Ya-Fang Hu ◽  
Li-Ping Jia ◽  
Fang-Yuan Yu ◽  
Li-Ying Liu ◽  
Qin-Wei Song ◽  
...  
Keyword(s):  
Molecular Epidemiology ◽  
Evolutionary Rate ◽  
Foot And Mouth Disease ◽  
Recent Common Ancestor ◽  
Rt Pcr ◽  
Coxsackievirus A16 ◽  
Most Recent Common Ancestor ◽  
Etiological Agents ◽  
High Level ◽  
And Control

Abstract Background Coxsackievirus A16 (CVA16) is one of the major etiological agents of hand, foot and mouth disease (HFMD). This study aimed to investigate the molecular epidemiology and evolutionary characteristics of CVA16. Methods Throat swabs were collected from children with HFMD and suspected HFMD during 2010–2019. Enteroviruses (EVs) were detected and typed by real-time reverse transcription-polymerase chain reaction (RT-PCR) and RT-PCR. The genotype, evolutionary rate, the most recent common ancestor, population dynamics and selection pressure of CVA16 were analyzed based on viral protein gene (VP1) by bioinformatics software. Results A total of 4709 throat swabs were screened. EVs were detected in 3180 samples and 814 were CVA16 positive. More than 81% of CVA16-positive children were under 5 years old. The prevalence of CVA16 showed obvious periodic fluctuations with a high level during 2010–2012 followed by an apparent decline during 2013–2017. However, the activities of CVA16 increased gradually during 2018–2019. All the Beijing CVA16 strains belonged to sub-genotype B1, and B1b was the dominant strain. One B1c strain was detected in Beijing for the first time in 2016. The estimated mean evolutionary rate of VP1 gene was 4.49 × 10–3 substitution/site/year. Methionine gradually fixed at site-23 of VP1 since 2012. Two sites were detected under episodic positive selection, one of which (site-223) located in neutralizing linear epitope PEP71. Conclusions The dominant strains of CVA16 belonged to clade B1b and evolved in a fast evolutionary rate during 2010–2019 in Beijing. To provide more favorable data for HFMD prevention and control, it is necessary to keep attention on molecular epidemiological and evolutionary characteristics of CVA16.

scholarly journals Neighboring Optimal Guidance and Constrained Attitude Control for Accurate Orbit Injection

2021 ◽  
Author(s):  
Mauro Pontani ◽  
Fabio Celani
Keyword(s):  
Attitude Control ◽  
Initial Position ◽  
Low Earth Orbit ◽  
Guidance And Control ◽  
Optimal Guidance ◽  
Combined Use ◽  
Upper Stage ◽  
Neighboring Optimal Guidance ◽  
And Control ◽  
Guidance Technique

AbstractAccurate orbit injection represents a crucial issue in several mission scenarios, e.g., for spacecraft orbiting the Earth or for payload release from the upper stage of an ascent vehicle. This work considers a new guidance and control architecture based on the combined use of (i) the variable-time-domain neighboring optimal guidance technique (VTD-NOG), and (ii) the constrained proportional-derivative (CPD) algorithm for attitude control. More specifically, VTD-NOG & CPD is applied to two distinct injection maneuvers: (a) Hohmann-like finite-thrust transfer from a low Earth orbit to a geostationary orbit, and (b) orbit injection of the upper stage of a launch vehicle. Nonnominal flight conditions are modeled by assuming errors on the initial position, velocity, attitude, and attitude rate, as well as actuation deviations. Extensive Monte Carlo campaigns prove effectiveness and accuracy of the guidance and control methodology at hand, in the presence of realistic deviations from nominal flight conditions.

scholarly journals Effect of Ionizing Radiation on the Bacterial and Fungal Endophytes of the Halophytic Plant Kalidium schrenkianum

2021 ◽  
Vol 9 (5) ◽  
pp. 1050
Author(s):  
Jing Zhu ◽  
Xiang Sun ◽  
Zhi-Dong Zhang ◽  
Qi-Yong Tang ◽  
Mei-Ying Gu ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Ionizing Radiation ◽  
Endophytic Bacteria ◽  
Fungal Endophytes ◽  
Root Endophytes ◽  
Fungal Community Structure ◽  
Geochemical Factors ◽  
Bacteria And Fungi ◽  
High Level ◽  
And Control

Endophytic bacteria and fungi colonize plants that grow in various types of terrestrial and aquatic ecosystems. Our study investigates the communities of endophytic bacteria and fungi of halophyte Kalidium schrenkianum growing in stressed habitats with ionizing radiation. The geochemical factors and radiation (at low, medium, high level and control) both affected the structure of endophytic communities. The bacterial class Actinobacteria and the fungal class Dothideomycetes predominated the endophytic communities of K. schrenkianum. Aerial tissues of K. schrenkianum had higher fungal diversity, while roots had higher bacterial diversity. Radiation had no significant effect on the abundance of bacterial classes. Soil pH, total nitrogen, and organic matter showed significant effects on the diversity of root endophytes. Radiation affected bacterial and fungal community structure in roots but not in aerial tissues, and had a strong effect on fungal co-occurrence networks. Overall, the genetic diversity of both endophytic bacteria and fungi was higher in radioactive environments, however negative correlations were found between endophytic bacteria and fungi in the plant. The genetic diversity of both endophytic bacteria and fungi was higher in radioactive environments. Our findings suggest that radiation affects root endophytes, and that the endophytes associated with aerial tissues and roots of K. schrenkianum follow different mechanisms for community assembly and different paradigms in stress response.

scholarly journals Does Gamifying Homework Influence Performance and Perceived Gameful Experience?

2021 ◽  
Vol 13 (9) ◽  
pp. 4829
Author(s):  
Ahmed Hosny Saleh Metwally ◽  
Maiga Chang ◽  
Yining Wang ◽  
Ahmed Mohamed Fahmy Yousef
Keyword(s):  
Learning Analytics ◽  
Educational Settings ◽  
Control Groups ◽  
Level Of Satisfaction ◽  
Growing Body ◽  
High Level ◽  
And Control

There is a growing body of literature that recognizes the importance of applying gamification in educational settings. This research developed an application to gamify students’ homework to address the concern of the students’ inability to complete their homework. This research aims to investigate students’ performance in doing their homework, and reflections and perceptions of the gameful experience in gamified homework exercises. Based on the data gathered from experimental and control groups (N = 84) via learning analytics, survey, and interview, the results show a high level of satisfaction according to students’ feedback. The most noticeable finding to extract from the analysis is that students can take on a persona, earn points, and experience a deeper sense of achievement through doing the gamified homework. Moreover, the students, on the whole, are likely to be intrinsically motivated whenever the homework is attributed to factors under their own control, when they consider that they have the expertise to be successful learners to achieve their desired objectives, and when they are interested in dealing with the homework for learning, not just achieving high grades.

scholarly journals Biotech/GM crops in horticulture: plum cv. HoneySweet resistant to Plum pox virus

2012 ◽  
Vol 48 (Special Issue) ◽  
pp. S43-S48 ◽  
Author(s):  
J. Polák ◽  
J. Kumar ◽  
B. Krška ◽  
M. Ravelonandro
Keyword(s):  
Tree Breeding ◽  
Fruit Tree ◽  
Eating Quality ◽  
Plum Pox Virus ◽  
Infection Pressure ◽  
Public Sector Research ◽  
The Usa ◽  
Chlorotic Leaf ◽  
High Level ◽  
And Control

Commercialisation of Biotech/GM (Biotech) crops started in 1995. Not only field crops, but also horticultural transgenic crops are under development and are beginning to be commercialised. Genetic engineering has the potential to revolutionise fruit tree breeding. The development of transgenic fruit cultivars is in progress. Over the past 20 years an international public sector research team has collaborated in the development of HoneySweet plum which is highly resistant to Plum pox virus (PPV) the most devastating disease of plums and other stone fruits. HoneySweet was deregulated in the USA in 2010. HoneySweet (aka C5) has been evaluated for eleven years (2002–2012) in a regulated field trial in the CzechRepublic for the resistance to PPV, Prune dwarf virus (PDV), and Apple chlorotic leaf spot virus (ACLSV), all of them being serious diseases of plum. Even under the high and permanent infection pressure produced through grafting, PPV has only been detected in HoneySweet trees in several leaves and fruits situated close to the point of inoculum grafting. The lack of infection spread in HoneySweet demonstrates its high level of PPV resistance. Co-infections of PPV with PDV and/or ACLSV had practically no influence on the quantity and quality of HoneySweet fruit which are large, sweet, and of a high eating quality. In many respects, they are superior to the fruits of the well-known cultivar Stanley. Many fruit growers and fruit tree nurseries in the CzechRepublic are supportive of the deregulation of HoneySweet plum to help improve the plum production and control the spread of PPV.

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