scholarly journals Effective Use of Emamectin Benzoate for the Management of Spodoptera frugiperda (J. E. Smith) in Maize

BioAssay ◽  
2021 ◽  
Vol 12 ◽  
pp. ba12001
Author(s):  
Fátima T. Rampelotti-Ferreira ◽  
Leonardo V. Thiesen ◽  
Janaina de N. Corassa ◽  
Adriana Nardon ◽  
Leandro V. dos Santos ◽  
...  
Keyword(s):  
Field Study ◽  
Pest Management ◽  
Spodoptera Frugiperda ◽  
Mode Of Action ◽  
Resistance Management ◽  
Emamectin Benzoate ◽  
Mato Grosso ◽  
Real Risk ◽  
Effective Use ◽  
Selection Of

Emamectin benzoate has been largely used for controling lepidopterans larvae in grains and fiber crops and, therefore, selection of resistant populations to this pesticide is a real risk if ignored the insect resistance management (IRM) strategies. We studied the susceptibility of Spodoptera frugiperda (Smith, 1797) populations in the state of Mato Grosso - Brazil to Emamectin benzoate as well as a field study about Mode of Action rotation including this compound. Low variations in susceptibility (resistance ratios, 1,01-7,31 fold) were detected among the evalueted S. frugiperda populations. The field study reinforced our monitorings outcome that Emamectin Benzoate controls S. frugiperda and its use in IRM in Mato Grosso is practicable. Susceptibility monitoring should be continuous in order to detect possible increases of tolerance rates not only for this pesticide but also for all compounds used for this pest management aiming to apply early mitigation actions.

scholarly journals Linha Básica de Suscetibilidade de Chrysodeixis includens (Walker, [1858]) (Lepidoptera: Noctuidae) a Benzoato de Emamectina

2019 ◽  
Vol 1 ◽  
pp. ec01015
Author(s):  
Naiara R. Nunes ◽  
Fátima T. Rampelotti-Ferreira ◽  
Leonardo V. Thiesen ◽  
Janaina N. Corassa ◽  
Rafael M. Pitta
Keyword(s):  
Insecticide Resistance ◽  
Insect Resistance ◽  
Artificial Diet ◽  
Resistance Management ◽  
Emamectin Benzoate ◽  
Mato Grosso ◽  
Insect Resistance Management ◽  
Diet Variation ◽  
Lepidoptera Noctuidae ◽  
Chrysodeixis Includens

Emamectin Benzoate was registered recently in Brazil to control Chrysodeixis includens (Walker, [1858]) (Lepidoptera: Noctuidae) in soybean. We studied the baseline susceptibility of Mato Grosso populations of C. includes to support Insect Resistance Management programs by standard feeding assays on insecticide-surface of artificial diet. Variation in susceptibility between populations was low. The LC50 values from 11 populations varied between 0.015 a 0.065 µg i.a. cm-2. Based on our results, we propose the discriminant concentration of 2.867 µg i.a. cm-2 of emamectin benzoate to monitor insecticide resistance in C. includes.

scholarly journals CHANGES IN SUSCEPTIBILITIES TO INSECTICIDES IN MUSCA DOMESTICA UNDER SELECTION WITH FIPRONIL

2020 ◽  
pp. 194-198
Author(s):  
Levchenko ◽  
Silivanova ◽  
Shumilova
Keyword(s):  
Insecticide Resistance ◽  
Pest Management ◽  
Musca Domestica ◽  
Resistance Management ◽  
Fourth Generation ◽  
Cross Resistance ◽  
Insecticide Resistance Management ◽  
Fifth Generation ◽  
New Knowledge ◽  
Selection Of

New knowledge about resistance and cross-resistance to insecticides of different chemical classes in insects is crucial for correct and effective pest management. This paper reports changes in the susceptibility to insecticides of different chemical classes in the first generations of houseflies Musca domestica L. when they were selected with fipronil. The selection of M. domestica was carried out by feeding adult insects with sugar containing fipronil in a dose that causes the 40–60% mortality of insects. The susceptibility of adults and larvae to insecticides was evaluated by the resistance ratio (RR). In the fipronil-selected strain of M. domestica, the susceptibility to fipronil was unchanged in adults in 3–5 generations and increased in larvae in the fifth generation (RR = 0.5). The susceptibility to deltamethrin decreased in adults of the fourth generation and in larvae of the fifth generation, and the RR was 4.5 and 4.3, respectively, that may suggest the development of cross-resistance in the future. The susceptibility to chlorfenapyr was reduced in adults of fipronil-selected flies of the fourth generation (RR = 1.9). The susceptibility to ivermectin increased in adults of fipronil-selected flies (RR = 0.67) and in larvae of the fifth generation (RR = 0.5). The susceptibility to acetamiprid in the fipronil-selected strain and the laboratory (unselected) strain of M. domestica did not differ. The results are useful for the development of insecticide resistance management programs.

Fitness costs associated with spinetoram resistance in Spodoptera frugiperda is driven by host plants

2021 ◽  
Author(s):  
Rubens Hideo Kanno ◽  
Aline Guidolin ◽  
Fernando Padovez ◽  
Juliana Rodrigues ◽  
Celso Omoto
Keyword(s):  
Insecticide Resistance ◽  
Spodoptera Frugiperda ◽  
Host Plants ◽  
Agricultural Landscape ◽  
Growth Parameters ◽  
Resistance Management ◽  
Population Increase ◽  
Relative Fitness ◽  
Fitness Costs ◽  
Cotton Plants

Insecticide resistance is usually associated with fitness costs. The magnitude of fitness costs is affected by environmental and ecological factors. Here, we explored how host plants could affect fitness costs associated with insecticide resistance. Initially, spinetoram-resistant (RR) and susceptible (SS) strains of Spodoptera frugiperda were selected using F2 screen from a population collected in Sao Desiderio, Bahia State, Brazil in 2018. Besides de RR and SS strains, fitness costs were also assessed for a heterozygous strain (RS). Life-history traits were evaluated to estimate population growth parameters of neonate larvae of each strain fed on corn, soybean and cotton plants. Compared to the SS strain, the relative fitness of the RR strain, based on intrinsic rate of population increase, was 1.06, 0.84 and 0.67 on plants of corn, soybean and cotton respectively. The relative fitness of the RS strain was similar to the SS strain regardless the host plant, suggesting a recessive fitness cost. No differences were found between the strains fed on corn plants. The larval development time was greater for RR strain fed on soybean and cotton plants compared to RS and SS strain. Low survival rate and fecundity of the RR strain were found when larvae fed on plants of soybean and cotton. The results of this study demonstrated that fitness costs of spinetoram resistance in S. frugiperda depend strongly on the host plants that S. frugiperda larvae fed on. Such information can be used to design resistance management strategies considering the host plants of the agricultural landscape. Keywords: fall armyworm; spinosyns; insect resistance management; relative fitness.

Spodoptera frugiperda. [Distribution map].

2017 ◽  
Author(s):  
Keyword(s):  
New York ◽  
South Carolina ◽  
Rhode Island ◽  
Spodoptera Frugiperda ◽  
Prince Edward Island ◽  
Rio Grande ◽  
Virgin Islands ◽  
Cayman Islands ◽  
Distribution Map ◽  
Mato Grosso

Abstract A new distribution map is provided for Spodoptera frugiperda (Smith). Lepidoptera: Noctuidae. Hosts: polyphagous but especially Poaceae. Information is given on the geographical distribution in Africa (Angola, Benin, Botswana, Burkina Faso, Burundi, Cameroon, Cape Verde, Central African Republic, Chad, Congo, Congo Democratic Republic, Ethiopia, Gabon, Ghana, Kenya, Malawi, Mozambique, Namibia, Niger, Nigeria, Rwanda, Sao Tome and Principe, Senegal, South Africa, Swaziland, Tanzania, Togo, Uganda, Zambia, Zimbabwe), North America (Canada, Manitoba, New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan, Mexico, USA, Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Virginia, West Virginia, Wisconsin, Wyoming), Central America & Caribbean (Anguilla, Antigua and Barbuda, Bahamas, Barbados, Belize, Bermuda, British Virgin Islands, Cayman Islands, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guadeloupe, Guatemala, Haiti, Honduras, Jamaica, Martinique, Montserrat, Nicaragua, Panama, Puerto Rico, St Kitts-Nevis, St Lucia, St Vincent and the Grenadines, Trinidad and Tobago, United States Virgin Islands), South America (Argentina, Bolivia, Brazil, Amapa, Amazonas, Bahia, Ceara, Espirito Santo, Goias, Maranhao, Mato Grosso, Mato Grosso do Sul, Minas Gerais, Para, Paraiba, Parana, Pernambuco, Rio de Janeiro, Rio Grande do Norte, Rio Grande do Sul, Roraima, Santa Catarina, Sao Paulo, Tocantins, Chile, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela).

scholarly journals Managing Herbicide Resistance: Listening to the Perspectives of Practitioners. Procedures for Conducting Listening Sessions and an Evaluation of the Process

2018 ◽  
Vol 32 (4) ◽  
pp. 489-497 ◽  
Author(s):  
Jill Schroeder ◽  
Michael Barrett ◽  
David R. Shaw ◽  
Amy B. Asmus ◽  
Harold Coble ◽  
...  
Keyword(s):  
Small Group ◽  
Herbicide Resistance ◽  
Planning Process ◽  
Resistance Management ◽  
Time Of Day ◽  
Full Group ◽  
Group Discussions ◽  
Small Group Discussions ◽  
The Subject ◽  
Selection Of

AbstractSeven half-day regional listening sessions were held between December 2016 and April 2017 with groups of diverse stakeholders on the issues and potential solutions for herbicide-resistance management. The objective of the listening sessions was to connect with stakeholders and hear their challenges and recommendations for addressing herbicide resistance. The coordinating team hired Strategic Conservation Solutions, LLC, to facilitate all the sessions. They and the coordinating team used in-person meetings, teleconferences, and email to communicate and coordinate the activities leading up to each regional listening session. The agenda was the same across all sessions and included small-group discussions followed by reporting to the full group for discussion. The planning process was the same across all the sessions, although the selection of venue, time of day, and stakeholder participants differed to accommodate the differences among regions. The listening-session format required a great deal of work and flexibility on the part of the coordinating team and regional coordinators. Overall, the participant evaluations from the sessions were positive, with participants expressing appreciation that they were asked for their thoughts on the subject of herbicide resistance. This paper details the methods and processes used to conduct these regional listening sessions and provides an assessment of the strengths and limitations of those processes.

scholarly journals Insecticidal Effect of Zinc Oxide Nanoparticles against Spodoptera frugiperda under Laboratory Conditions

Insects ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1017
Author(s):  
Sarayut Pittarate ◽  
Julius Rajula ◽  
Afroja Rahman ◽  
Perumal Vivekanandhan ◽  
Malee Thungrabeab ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Life Cycle ◽  
Pest Management ◽  
Zno Nanoparticles ◽  
Spodoptera Frugiperda ◽  
Adult Emergence ◽  
Zno Nps ◽  
Alternative Source ◽  
Laboratory Conditions ◽  
Significant Difference

Fall armyworm Spodoptera frugiperda is a major pest of corn, rice, and sorghum among other crops usually controlled using synthetic or biological insecticides. Currently, the new invention of nanotechnology is taking root in the agricultural industry as an alternative source of pest management that is target-specific, safe, and efficient. This study sought to determine the efficacy of commercial Zinc Oxide (ZnO) nanoparticles (NPs) towards S. frugiperda under laboratory conditions. ZnO NPs were diluted into different concentrations (100–500 ppm), where the baby corn used to feed the S. frugiperda larvae was dipped. The development of the insect feeding on food dipped in ZnO solution was significantly (p < 0.05) affected, and the number of days that the insect took to complete its life cycle had a significant difference compared to the control. There was a significant difference in the adults’ emergence in all the concentrations of ZnO NPs compared to the control, with over 90% of the eggs successfully going through the life cycle until adult emergence. Additionally, several body malformations were observed throughout the lifecycle of the insect. Also, the fecundity of the females was greatly affected. The findings of this study suggest the possibility of exploitation of ZnO nanoparticles not only to manage S. frugiperda but to significantly reduce their population in the ecosystem through body deformations, reduced fecundity, reduced oviposition, and hatchability of eggs. It will be a valuable tool in integrated pest management regimens.

scholarly journals Fungicide resistance characterised across seven chemical classes in a Botrytis cinerea population isolated from Australian vineyards

2021 ◽  
Author(s):  
Lincoln A. Harper ◽  
Scott Paton ◽  
Barbara Hall ◽  
Suzanne McKay ◽  
Richard P. Oliver ◽  
...  
Keyword(s):  
Adverse Effect ◽  
Botrytis Cinerea ◽  
Fungicide Resistance ◽  
Chemical Control ◽  
Management Strategies ◽  
Resistance Management ◽  
Gray Mold ◽  
Chemical Groups ◽  
Important Disease ◽  
Selection Of

AbstractGray mold, caused by Botrytis cinerea, is an economically important disease of grapes in Australia and across grape growing regions worldwide. Control of this disease relies heavily on canopy management and the application of single site fungicides. Fungicide application can lead to the selection of fungicide resistant B. cinerea populations, which has an adverse effect on the chemical control of the disease. Characterising the distribution and severity of resistant B. cinerea populations is needed to inform resistance management strategies. In this study, 725 isolates were sampled from 75 Australian vineyards during 2013 – 2016 and were screened against seven fungicides with different MOAs. The resistance frequencies for azoxystrobin, boscalid, fenhexamid, fludioxonil, iprodione, pyrimethanil and tebuconazole were 5, 2.8, 2.1, 6.2, 11.6, 7.7 and 2.9% respectively. Nearly half of the resistant isolates (43.7%) were resistant to more than one of the fungicides tested. The frequency of vineyards with at least one isolate simultaneously resistant to 1, 2, 3, 4 or 5 fungicides was 19.5, 7.8, 6.5, 10.4 and 2.6%.Resistance was associated with previously published genotypes in CytB (G143A), SdhB (H272R/Y), Erg27 (F412S), Mrr1 (D354Y), Os1 (I365S, N373S + Q369P, I365S + D757N) and Pos5 (P319A, L412F). Expression analysis was used to characterise fludioxonil resistant isolates exhibiting overexpression (6.3 - 9.6-fold) of the ABC transporter encoded by AtrB (MDR1 phenotype). Novel genotypes were also described in Mrr1 (S611N, D616G) and Cyp51 (P357S). Resistance frequencies were lower when compared to most previously published surveys of both grape and non-grape B. cinerea resistance. Nonetheless, continued monitoring of critical chemical groups used in Australian vineyards is recommended.

scholarly journals Calibration and measurement capability (CMC) and customer technical qualification

2019 ◽  
Author(s):  
Suelí Fischer Beckert ◽  
Renan Ednan Flôres
Keyword(s):  
Measuring Range ◽  
Measurement Capability ◽  
Normative Documents ◽  
Calibration Methods ◽  
Accredited Laboratories ◽  
Accredited Laboratory ◽  
Effective Use ◽  
Formal Recognition ◽  
Selection Of ◽  
Calibration And Measurement Capability

In the context of metrological confirmation, calibration is an essential process in all quality assurance efforts. Several organizations choose to outsource this activity to accredited laboratories in accordance with the requirements set forth in ISO/IEC 17025: 2017. Companies understand that accredited laboratory has formal recognition of its technical competence to perform the services within its scope of accreditation. The document ILAC P14: 2013 sets out guidelines for the presentation of Calibration and Measurement Capability (CMC). However, when analysing the scope of accredited laboratories in some national calibration bodies, it is possible to observe that, for the same instrument and the same measuring range, different values are attributed to CMC. If the CMC should result from normal calibration operations on the best existing device, what causes this dispersion? How can the customer make effective use of the information contained in accreditation scopes? In order to further standardize the presentation of CMC in accreditation scopes, calibration methods adopted by laboratories should be required to meet the maximum permissible errors established by manufacturers or normative documents. Companies can outsource calibration activities. But the selection of service provider and the interpretation of the results remains a customer assignment. The paper presents an analysis of accreditation scopes of different national calibration bodies and discusses the qualification of those in charge of metrology management, regarding the knowledge and skills required for activity.

scholarly journals Agua, economía y territorio: nuevos enfoques de la Directiva Marco del Agua para la gestión del recurso

2020 ◽  
Vol 29 (1) ◽  
pp. 65
Author(s):  
José A. Gómez-Limón ◽  
Julia Martin-Ortega
Keyword(s):  
Economic Analysis ◽  
Economic Activities ◽  
Public Authorities ◽  
Management Plans ◽  
Water Management Plans ◽  
Development Processes ◽  
Economic Good ◽  
Effective Use ◽  
Water Uses ◽  
Selection Of

Water is a natural resource that performs different functions in development processes (satisfaction of population’s basic needs, key element for ecosystems and landscapes, input in different economic activities, etc.). Taking into account this relevance and its features as an economic good, public authorities have carried out an important role as regulators. The last milestone in this path has been the approval of the Water Framework Directive. One of the most innovative points of this European rule is the use of economic analysis for the optimisation of different water uses. However, the development of the works done for the design of the new water management plans has shown several shortcomings regarding the economic analysis of water uses, the analysis of costs recovery for water services and the selection of meassures to reach these objectives. In this sense it is necessary to strength the nexus between the policy- making and academic spheres in order to support a more rigorous and effective use of the large scientific knowledge developed in this field.

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