scholarly journals Current Knowledge of the Entomopathogenic Fungal Species Metarhizium flavoviride Sensu Lato and Its Potential in Sustainable Pest Control

Insects ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 385
Author(s):  
Tóthné Bogdányi ◽  
Petrikovszki ◽  
Balog ◽  
Putnoky-Csicsó ◽  
Gódor ◽  
...  
Keyword(s):  
Management Practices ◽  
Current Knowledge ◽  
Field Studies ◽  
Fungal Species ◽  
Metarhizium Flavoviride ◽  
Research Areas ◽  
Fungal Entomopathogens ◽  
Basic Studies ◽  
New Research ◽  
Sustainable Pest Control

Fungal entomopathogens are gaining increasing attention as alternatives to chemical control of arthropod pests, and the literature on their use under different conditions and against different species keeps expanding. Our review compiles information regarding the entomopathogenic fungal species Metarhizium flavoviride (Gams and Rozsypal 1956) (Hypocreales: Clavicipitaceae) and gives account of the natural occurrences and target arthropods that can be controlled using M. flavoviride. Taxonomic problems around M. flavoviride species sensu lato are explained. Bioassays, laboratory and field studies examining the effect of fermentation, culture regimes and formulation are compiled along with studies on the effect of the fungus on target and non-target organisms and presenting the effect of management practices on the use of the fungus. Altogether, we provide information to help conducting basic studies, and by pointing out relatively uncharted territories, help to set new research areas.

Applying the socio-ecological approach to biocrust research: a call for scientific action

2021 ◽  
Author(s):  
Lisa Maggioli ◽  
Maria Lopez Rodriguez ◽  
Sonia Chamizo ◽  
Yolanda Cantón ◽  
Emilio Rodriguez-Caballero
Keyword(s):  
Management Practices ◽  
Global Scale ◽  
Social Dimension ◽  
Ecological Approach ◽  
Ecological Research ◽  
Soil Biodiversity ◽  
Research Perspective ◽  
Research Areas ◽  
The Social ◽  
New Research

<p>Biocrusts play a key role in maintaining drylands ecosystems at the global scale. These keystone communities face important human[ERC1]  threats (e.g. climate change) that can result in both biocrust coverage loss and community composition changes and are expected to negatively affect soil biodiversity, and the functioning and resilience of drylands ecosystems. In this adverse scenario, there is an urgent need to develop legal science-based frameworks that underpin their protection. The social-ecological approach, as a research framing oriented to produce scientific knowledge able to properly inform policy actions and management practices, can help us to advance in this direction. By reviewing literature in Spanish biocrusts from the social–ecological approach, here we found that the ecological scope</p><p>of biocrust has been widely studied in the last decades; however, the social dimension of their role remained unexplored. In addition, we identified knowledge gaps and new research areas that need to be addressed in order to (1) produce research that better informs policy and society about the role of these keystone communities, and (2) promote the best available evidence on the biocrusts role which can be used to support conservation actions. On this basis, we call for a transition from an “ecological research perspective” to a “social–ecological research perspective” into the biocrust area in order to promote evidence-based conservation practices that contribute to the preservation of these representative communities of drylands all over the world.</p>

Community dynamics in highland watersheds

2017 ◽  
Author(s):  
Dean Jacobsen ◽  
Olivier Dangles
Keyword(s):  
High Altitude ◽  
Community Dynamics ◽  
Community Organization ◽  
Current Knowledge ◽  
Central Process ◽  
Spatial Variables ◽  
Research Areas ◽  
Local Extinctions ◽  
Metacommunity Dynamics ◽  
Natural Communities

Chapter 6 presents the interaction between space and time in determining the organization of natural communities in high altitude heterogeneous waterscapes. After explaining why high altitude waters represent suitable models for examining metacommunity organization, the chapter focuses on dispersal—a central process to allow colonization and establishment of populations in remote localities and to counter local extinctions. Community organization patterns are then described for a variety of organisms living in high altitude waters, from microbes to invertebrates to fish and birds. These patterns reveal that both environmental and spatial variables are generally involved in species assembling. Examples of studies on directional spatial processes (e.g. through wind and water flow), waterscape genetics, and temporal variability (synchrony/asynchrony) are highlighted as promising research areas to increase the current knowledge on high altitude metacommunity dynamics.

scholarly journals Fitness of Herbicide-Resistant Weeds: Current Knowledge and Implications for Management

Plants ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 469 ◽  
Author(s):  
Vila-Aiub
Keyword(s):  
Life History ◽  
Herbicide Resistance ◽  
Management Practices ◽  
Current Knowledge ◽  
Resistance Management ◽  
Fitness Cost ◽  
Plant Fitness ◽  
Resistance Mutations ◽  
Fitness Costs ◽  
Wide Range

Herbicide resistance is the ultimate evidence of the extraordinary capacity of weeds to evolve under stressful conditions. Despite the extraordinary plant fitness advantage endowed by herbicide resistance mutations in agroecosystems under herbicide selection, resistance mutations are predicted to exhibit an adaptation cost (i.e., fitness cost), relative to the susceptible wild-type, in herbicide untreated conditions. Fitness costs associated with herbicide resistance mutations are not universal and their expression depends on the particular mutation, genetic background, dominance of the fitness cost, and environmental conditions. The detrimental effects of herbicide resistance mutations on plant fitness may arise as a direct impact on fitness-related traits and/or coevolution with changes in other life history traits that ultimately may lead to fitness costs under particular ecological conditions. This brings the idea that a “lower adaptive value” of herbicide resistance mutations represents an opportunity for the design of resistance management practices that could minimize the evolution of herbicide resistance. It is evident that the challenge for weed management practices aiming to control, minimize, or even reverse the frequency of resistance mutations in the agricultural landscape is to “create” those agroecological conditions that could expose, exploit, and exacerbate those life history and/or fitness traits affecting the evolution of herbicide resistance mutations. Ideally, resistance management should implement a wide range of cultural practices leading to environmentally mediated fitness costs associated with herbicide resistance mutations.

scholarly journals Effect of Pheromone Blend Components, Sex Ratio, and Population Size on the Mating of Cadra cautella (Lepidoptera: Pyralidae)

2020 ◽  
Vol 20 (6) ◽  
Author(s):  
Abeysinghe Mudiyanselage Prabodha Sammani ◽  
Dissanayaka Mudiyanselage Saman Kumara Dissanayaka ◽  
Leanage Kanaka Wolly Wijayaratne ◽  
William Robert Morrison
Keyword(s):  
Sex Ratio ◽  
Population Size ◽  
Management Practices ◽  
Mating Disruption ◽  
Current Knowledge ◽  
Mating Status ◽  
Cadra Cautella ◽  
Synthetic Chemicals ◽  
Population Sizes ◽  
Lepidoptera Pyralidae

Abstract The almond moth Cadra cautella (Walker), a key pest of storage facilities, is difficult to manage using synthetic chemicals. Pheromone-based management methods remain a high priority due to advantages over conventional management practices, which typically use insecticides. Cadra cautella females release a blend of pheromone including (Z, E)-9,12-tetradecadienyl acetate (ZETA) and (Z)-9-tetradecadien-1-yl acetate (ZTA). The effect of these components on mating of C. cautella and how response varies with the population density and sex ratio remain unknown. In this study, the mating status of C. cautella was studied inside mating cages under different ratios of ZETA and ZTA diluted in hexane and at different population sizes either with equal or unequal sex ratio. The lowest percentage of mated females (highest mating disruption [MD] effects), corresponding to roughly 12.5%, was produced by a 5:1 and 3.3:1 ratio of ZETA:ZTA. Populations with equal sex ratio showed the lowest percentage of mated females, at 20% and 12.5% under lower and higher density, respectively. The next lowest percentage of mated females was produced when the sex ratio was set to 1: 2 and 2:1 male:female, with just 25% and 22.5% of moths mated, respectively. This study shows that mating status of C. cautella is influenced by ZETA:ZTA ratio, sex ratio, and population size. This current knowledge would have useful implications for mating disruption programs.

scholarly journals Prediction of leaching and groundwater contamination by pesticides

2006 ◽  
Vol 78 (5) ◽  
pp. 1081-1090 ◽  
Author(s):  
Werner Kördel ◽  
Michael Klein
Keyword(s):  
Maximum Concentration ◽  
Management Practices ◽  
Preferential Flow ◽  
Soil Depth ◽  
Sandy Soils ◽  
Field Studies ◽  
Macropore Flow ◽  
Eu Directive ◽  
Present Information ◽  
Silty Soils

Herein, we describe how pesticide leaching is assessed in Europe in order to fulfill EU Directive 91/414. The assessment schemes were developed to protect groundwater from unacceptable effects caused by pesticide use. They presently focus on chromatographic flow processes, which are dominant in sandy soils. Nevertheless, important regions in Europe are characterized by structured soils where transport through macropores is most relevant.Comparison of parallel field studies with isoproturon performed in sandy and silty soils showed that maximum concentration in the structured soil at a soil depth of 1 m may exceed respective concentrations in sandy soils by a factor of 60. Similar results were obtained by lysimeter studies using silty soil cores with maximum concentration of 40 μg/l at the soil bottom. These results demonstrate that preferential flow is more the rule than the exception in well-structured fine-textured soils, and pesticide losses via macropore flow may exceed losses via matrix transport considerably. All present information available for macropore flow suggest the need for greater regional assessments. Other recommendations include analysis of the influence of different soil management practices on the formation of macropores.

Reflections on the biochemistry ofEchinococcus: past, present and future

Parasitology ◽  
2009 ◽  
Vol 136 (12) ◽  
pp. 1643-1652 ◽  
Author(s):  
D. P. McMANUS
Keyword(s):  
Hydatid Disease ◽  
Biochemical Analysis ◽  
Species Variation ◽  
Research Directions ◽  
Future Studies ◽  
Tegumental Surface ◽  
Research Areas ◽  
General Metabolism ◽  
New Research ◽  
The Impact

SUMMARYThis review discusses 5 of my earliest papers on the biochemistry of larvalEchinococcuspublished inParasitologyin the 1970s and 1980s. Two of the publications consider aspects of the basic biochemistry, intermediary metabolism and the regulation of respiratory pathways inE. granulosusandE. multilocularis, and emphasize the existence of inter- and intra-species variation in their general metabolism. The third reports on the detailed biochemical analysis of the tegumental surface of the protoscolex ofE. granulosus, and the final 2 papers describe the genomic cloning ofEchinococcusDNA fragments and their use, along with other DNA markers, in molecular identification ofE. granulosusisolates collected worldwide from areas endemic for hydatid disease. A number of years have elapsed since these publications inParasitologyand, in this Centenary Issue article, I reflect briefly on some of the subsequent studies undertaken in these research areas that have advanced the field. As well, I provide brief insight on new research directions, emphasizing the impact of molecular biology and associated techniques on future studies ofEchinococcusand hydatid disease.

scholarly journals Diversity within the entomopathogenic fungal species Metarhizium flavoviride associated with agricultural crops in Denmark

2015 ◽  
Vol 15 (1) ◽  
Author(s):  
Chad A. Keyser ◽  
Henrik H. De Fine Licht ◽  
Bernhardt M. Steinwender ◽  
Nicolai V. Meyling
Keyword(s):  
Fungal Species ◽  
Agricultural Crops ◽  
Metarhizium Flavoviride

Analysis of Aluminium Beam-to-Column Joints by the Component Method: Existing Studies and Research Needs

2016 ◽  
Vol 710 ◽  
pp. 409-414 ◽  
Author(s):  
Gianfranco De Matteis ◽  
Giuseppe Brando
Keyword(s):  
Current Knowledge ◽  
Component Method ◽  
The Past ◽  
Research Fields ◽  
Numerical Studies ◽  
Current State ◽  
Moment Resisting ◽  
New Research ◽  
Steel Joints

This paper aims at providing an overview on the current state of the art and on possible future developments concerning the component method implementation for the classification of beam-to-column joints belonging to aluminum moment resisting frames.After a brief discussion on the component method theoretical bases, developed in the past to give a feasible calculation procedure for steel joints, recent experimental and numerical studies, carried out for investigating some aluminum components, are presented and discussed. In particular strengths and weaknesses of the current knowledge are put into evidence, also in light of the peculiarities that make aluminum alloys different from steel. The launch of new research fields, aimed at pursuing an update of the current codes dealing with aluminum structures, is therefore proposed.

The Case for Post-Modern Management Accounting: Thinking Outside the Box

2009 ◽  
Vol 21 (1) ◽  
pp. 3-18 ◽  
Author(s):  
Jacob G. Birnberg
Keyword(s):  
Education Research ◽  
Business Education ◽  
Management Accounting ◽  
Modern Management ◽  
Accounting Research ◽  
The Past ◽  
Research Areas ◽  
Problems Of Practice ◽  
New Research ◽  
Outside The Box

ABSTRACT: I argue that the time has come for management accounting researchers to again consider the orientation of our research. Over the past several decades, the focus of research in management accounting has evolved. Initially, research was heavily influenced by the needs of practice. After the Ford Foundation's initiative to professionalize business education, research became more and more theoretical and inward-facing. At a time when practice is in need of assistance, our current focus has led to research that is primarily intended to enhance current models rather than assist in solving the problems of practice. After arguing that there is a need for a change, I offer several examples of new research areas where management accounting research could assist practice.

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