scholarly journals Efficacy of a novel nematicidal seed treatment against >I/ii/i< in soybean

2020 ◽  
Author(s):  
Daniela Roncato Ribeiro
Keyword(s):  
Seed Treatment ◽  
Heterodera Glycines ◽  
Pratylenchus Brachyurus

scholarly journals BIOLOGICAL NEMATICIDES ASSOCIATED WITH POULTRY LITTER IN THE CONTROL OF NEMATODES IN SOYBEAN AND SECOND CORN CROP

2021 ◽  
Vol 34 (3) ◽  
pp. 580-589
Author(s):  
TAYRLEN EDUARDO AMORIM ROSA ◽  
JEAN CRAMENAK DE SOUZA ◽  
WELLINGTON JOSÉ PEREIRA ◽  
JANAINA ALVES DE ALMEIDA MOREIRA ◽  
FERNANDO GODINHO DE ARAÚJO
Keyword(s):  
Heterodera Glycines ◽  
Block Design ◽  
Poultry Litter ◽  
Growing Season ◽  
Fresh Weight ◽  
Management Measures ◽  
Randomized Block Design ◽  
Pratylenchus Brachyurus ◽  
Infested Field ◽  
Soybean Plants

ABSTRACT Alternative management measures have been used to reduce nematode population levels in affected areas. In this perspective, the objective was to evaluate the efficiency of nematicides based on fungus and bacterium, associated with poultry litter applied via ground in the management of Pratylenchus brachyurus and Heterodera glycines in soybean and corn crops in succession. The experiment was conducted in the 2018/19 growing season in the municipality of Ipameri– GO (-17°34’55.58”S−48°12’02.35”O) in naturally infested field, arranged in a randomized block design, with 10 treatments and 4 replicates, being: T1- Witness/ control, T2- Poultry litter, T3- P. lilacinum + T. harzianum, T4- B. subtilis + B. licheniformis, T5- P. chlamydosporia, T6- Abamectina, T7- P. lilacinum + T. harzianum + Poultry litter, T8- B. subtilis + B. licheniformis + Poultry litter, T9- P. chlamydosporia + Poultry litter, T10- Abamectina + Poultry litter. The poultry litter was added in the soil 10 days before planting. The plots were composed of 6 lines of 6 m, with a spacing of 0.5 m. In the soybean crop at 45 and 90 days after sowing (DAS), the fresh weight of the roots (MFR), nematological variables and productivity were evaluated. In corn, only nematological variables were evaluated at 60 DAS. The treatments using P. lilacinum + T. harzianum and B. subtillis + B. licheniformes increased the MFR and reduced the number of P. brachyurus and H. glycines at the root. P. chlamydosporia associated with poultry litter increased in productivity in soybean plants.

scholarly journals Fitonematoides e Estratégias Adotadas em seu Controle

2020 ◽  
Vol 24 (2) ◽  
pp. 126-130
Author(s):  
Débora Perdigão Tejo ◽  
Carlos Henrique Dos Santos Fernandes ◽  
Juliana Sawada Buratto
Keyword(s):  
Heterodera Glycines ◽  
Pratylenchus Brachyurus

Os fitonematoides são organismos parasitas que habitam o substrato do solo e acarretam inúmeros prejuízos na esfera agrícola mundial. O poder de devastação destes organismos se potencializa em função de dificuldade envolvida no manejo visando sua redução populacional em áreas de exploração agrícola. O objetivo deste estudo é caracterizar os nematoides que causam maiores danos em espécies vegetais cultivadas na agricultura e exibir metodologias de controle da população de nematoides em áreas de cultivo. Entre as espécies com maior destaque na agricultura estão Pratylenchus brachyurus e Heterodera glycines, que acarretam prejuízos na agricultura por ocasionarem lesões no sistema radicular de diversas espécies vegetais cultivadas de interesse econômico. Metodologias de controle vêm sendo adotadas na tentativa de reduzir os prejuízos, entre essas, o controle químico por meio de moléculas químicas que podem resultar em outros transtornos em determinadas situações, controle biológico ainda pouco utilizado, porém com inúmeras vantagens, resistência genética, rotação de culturas e cultivo de espécies antagônicas a proliferação de nematoides. Por meio do desenvolvimento deste trabalho ficou evidenciado que os fitonematoides ocasionam problemas na produção agrícola, podendo comprometer, em alguns casos, dependendo do nível de infestação da área e da espécie vegetal cultivada, a produção total de uma lavoura. O método mais aconselhado de controle é o cultivo de espécies nas quais o nematoide não parasite, quebrando desta forma seu ciclo e reduzindo a população na área inicialmente comprometida.

scholarly journals Effects of ILeVO Seed Treatment on Heterodera glycines Reproduction and Soybean Yield in Small-Plot and Strip-Trial Experiments in Iowa

Plant Disease ◽  
2020 ◽  
Vol 104 (11) ◽  
pp. 2914-2920 ◽  
Author(s):  
Kaitlyn M. Bissonnette ◽  
Christopher C. Marett ◽  
Mark P. Mullaney ◽  
Gregory D. Gebhart ◽  
Peter M. Kyveryga ◽  
...  
Keyword(s):  
Population Density ◽  
Soybean Cyst Nematode ◽  
Seed Treatment ◽  
Heterodera Glycines ◽  
Field Studies ◽  
Experimental Unit ◽  
Soybean Yield ◽  
Yield Increase ◽  
Small Plot ◽  
Soybean Plants

ILeVO (fluopyram) is a fungicide seed treatment for soybean sudden death syndrome (SDS) that also has nematicidal activity. ILeVO is sold with a base of insecticide Poncho (clothianidin), nematode-protectant VOTiVO (Bacillus firmus), and Acceleron fungicides (metalaxyl, fluxapyroxad, and pyraclostrobin). Yield and reproduction of the soybean cyst nematode (SCN) (Heterodera glycines) on soybean plants grown from seed treated with ILeVO plus the base were compared with those treated with only the base in 27 small-plot experiments and 12 strip-trial experiments across Iowa from 2015 to 2017. To increase the likelihood that yield results were related to effects on SCN, data were used only from 26 small-plot experiments and 12 strip trials in which symptoms of SDS were low or nonexistent. An SCN reproductive factor (RF) was calculated for each experimental unit by dividing the SCN population density at harvest by the population density at planting. ILeVO significantly reduced SCN RF by 50% in one strip-trial experiment and by 36 to 60% in four small-plot experiments but yields were not increased by ILeVO in any of those five experiments. Soybean yields were 2.8 to 3.7 bushels/acre (bu/ac) (188.3 to 248.8 kg/ha) greater with ILeVO in three small-plot experiments but SCN RF was not reduced in those experiments. Also, yield was 1.9 bu/ac (127.8 kg/ha) greater with ILeVO in one strip-trial experiment in 2016 but SCN samples were not collected at harvest from the study to assess the possible effects of ILeVO on SCN reproduction. When strip-trial data from 2015 and 2016 were combined, there was a small but significant 0.8 bu/ac (52.2 kg/ha) yield increase with ILeVO. Overall, the effects of ILeVO on SCN reproduction and soybean yield were variable in these field studies.

scholarly journals Uso de esterco bovino e cobertura de solo no manejo de nematoides na cultura da soja

2021 ◽  
Vol 27 (1) ◽  
pp. 32-50
Author(s):  
Mauro Junior Natalino da Costa
Keyword(s):  
Heterodera Glycines ◽  
Meloidogyne Javanica ◽  
Rotylenchulus Reniformis ◽  
Pratylenchus Brachyurus

As doenças causadas por nematoides são consideradas importantes devido ao hábito polífago desses patógenos, estratégias de sobrevivência e aos prejuízos econômicos causados. No Brasil, as espécies que provocam os maiores danos na cultura da soja são: Meloidogyne javanica, M. incognita, Heterodera glycines, Pratylenchus brachyurus, Rotylenchulus reniformis e Aphelenchoides sp. Recentemente, surgiram relatos de incidência, em algumas regiões, de Tubixaba spp., Scutellonema brachyurus e Helicotylenchus dihystera. Dessa forma, é necessária a utilização de estratégias de manejo que auxiliem na redução dos níveis populacionais desses fitoparasitas. O uso de esterco bovino, associado a espécies vegetais para cobertura de solo, apresentase como uma alternativa para manejo de nematoides na cultura da soja, devido a um conjunto de propriedades nematostáticas e nematicidas, ao efeito benéfico às plantas e ao estímulo do desenvolvimento de inimigos naturais. São indicadas espécies de plantas que produzam resíduos que cubram melhor o solo, deixem mais palhada, distribuam seus sistemas radiculares pivotantes e/ou fasciculados, mantenham ou aumentem os teores de carbono, e incrementem a densidade/ riqueza macro e microbiológica. Esta revisão tem o objetivo de apresentar e discutir os principais efeitos do uso de matéria orgânica e alternativas de manejo e controle de nematoides na cultura da soja com o emprego de esterco bovino e cobertura de solo com diferentes espécies de plantas.

scholarly journals Effects of Clariva Complete Beans Seed Treatment on Heterodera glycines Reproduction and Soybean Yield in Iowa

2018 ◽  
Vol 19 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Kaitlyn M. Bissonnette ◽  
Christopher C. Marett ◽  
Mark P. Mullaney ◽  
Gregory D. Gebhart ◽  
Peter Kyveryga ◽  
...  
Keyword(s):  
Soybean Cyst Nematode ◽  
Seed Treatment ◽  
Heterodera Glycines ◽  
Soil Samples ◽  
Population Densities ◽  
Reproductive Factor ◽  
Yield Data ◽  
Soybean Yield ◽  
Small Plot ◽  
Moderately Resistant

In recent years, nematode-protectant seed treatments have become available to supplement resistant soybean cultivars to manage soybean cyst nematode (Heterodera glycines; SCN). Twenty-seven small-plot and 18 strip-trial experiments were conducted comparing the effects of Clariva Complete Beans (CCB) and CruiserMaxx Advanced plus Vibrance (CMV) on SCN reproduction and soybean yield on a moderately resistant (2014) and resistant (2015 to 2016) soybean cultivar. Yield data were collected, and an SCN reproductive factor was calculated by dividing final (at harvest) SCN egg population densities by initial (at planting) population densities from soil samples collected in each small plot or sampled area in the strip trials. Relative to the CMV treatment, CCB significantly decreased SCN reproductive factor in two small-plot experiments (one each in 2014 and 2015) but not in any of the strip trials in any year. Soybean yields were significantly greater with CCB versus CMV in 5 of the 18 strip trials but not in any of the small-plot experiments, even when there were significant decreases in SCN reproduction. For unknown reasons, CCB significantly decreased yields in two small-plot experiments and at one strip-trial location. In summary, the effects of CCB seed treatment on SCN reproduction and soybean yields were variable in the years that these experiments were conducted in Iowa.

scholarly journals Effect of Soybean Cyst Nematode Resistance Source and Seed Treatment on Population Densities of Heterodera glycines, Sudden Death Syndrome, and Yield of Soybean

Plant Disease ◽  
2017 ◽  
Vol 101 (12) ◽  
pp. 2137-2143 ◽  
Author(s):  
Yuba R. Kandel ◽  
Kiersten A. Wise ◽  
Carl A. Bradley ◽  
Martin I. Chilvers ◽  
Adam M. Byrne ◽  
...  
Keyword(s):  
Sudden Death ◽  
Soybean Cyst Nematode ◽  
Seed Treatment ◽  
Heterodera Glycines ◽  
Plant Introduction ◽  
Cyst Nematode ◽  
Sudden Death Syndrome ◽  
Population Densities ◽  
Scn Resistance ◽  
Pi 88788

A three-year study was conducted in Illinois, Indiana, Iowa, Michigan, and Ontario, Canada, from 2013 through 2015 to determine the effect of soybean (Glycine max) cultivars’ source of soybean cyst nematode (SCN; Heterodera glycines) resistance on SCN population densities, sudden death syndrome (SDS; caused by Fusarium virguliforme), and yield of soybean. Five cultivars were evaluated with and without fluopyram seed treatment at each location. Cultivars with no SCN resistance had greater SDS severity, greater postharvest SCN egg counts (Pf), and lower yield than cultivars with plant introduction (PI) 548402 (Peking) and PI 88788-type of SCN resistance (P < 0.05). Cultivars with Peking-type resistance had lower Pf than those with PI 888788-type and no SCN resistance. In two locations with HG type 1.2-, cultivars with Peking-type resistance had greater foliar disease index (FDX) than cultivars with PI 88788-type. Fluopyram seed treatment reduced SDS and improved yield compared with a base seed treatment but did not affect SCN reproduction and Pf (P > 0.05). FDX and Pf were positively correlated in all three years (P < 0.01). Our results indicate that SDS severity may be influenced by SCN population density and HG type, which are important to consider when selecting cultivars for SCN management.

Pasteuria thornei, a novel biological seed treatment for Pratylenchus brachyurus control in soybean

Nematology ◽  
2018 ◽  
Vol 20 (6) ◽  
pp. 519-523 ◽  
Author(s):  
Pedro Marcus de Souza Confort ◽  
Mario Massayuki Inomoto
Keyword(s):  
Glycine Max ◽  
Synergistic Effect ◽  
Seed Treatment ◽  
Nematode Population ◽  
Assessment Criterion ◽  
Combined Use ◽  
Mixed Treatment ◽  
Pratylenchus Brachyurus

Summary The goal of this study was to evaluate the efficiency of Pasteuria thornei as a biological seed treatment for Pratylenchus brachyurus control in soybean (Glycine max). Seeds of soybean ‘SYN1080’ were treated with three concentrations of P. thornei endospores per seed (5 × 106, 107, 1.5 × 107), together with two other treatments for comparison: a commercial control containing abamectin (0.58 mg seed−1) and a mixed treatment containing abamectin (0.58 mg seed−1) and 107 endospores of P. thornei. These seeds were sown in plastic cups containing soil inoculated with 1000 nematodes (Trial 1) and 600 nematodes (Trial 2). The trials were evaluated at 60 and 90 days after inoculation (dai). The total of nematodes extracted from the roots of each plant was used as the assessment criterion. Only the highest concentration of P. thornei endospores (1.5 × 107) consistently reduced the final populations of P. brachyurus by 25-50% compared to the non-treated seeds. The treatments containing abamectin were superior in reducing the nematode population in all trials and evaluations. There was no visible synergistic effect of the combined use of abamectin and P. thornei in the same treatment at 90 dai.

scholarly journals Tagetes minuta Propagation and Interaction With Nematoide

2018 ◽  
Vol 11 (1) ◽  
pp. 139
Author(s):  
Camila T. Stroze ◽  
Fernando C. Baida ◽  
Maria I. Balbi-Peña ◽  
Cláudia R. Dias-Arieira ◽  
Débora C. Santiago
Keyword(s):  
Meloidogyne Incognita ◽  
Heterodera Glycines ◽  
Nematode Species ◽  
Root Anatomy ◽  
Plant Parasite ◽  
Tagetes Minuta ◽  
Pratylenchus Brachyurus ◽  
Rf Values ◽  
Nematode Penetration ◽  
Reproduction Factor

Tagetes minuta is a plant presenting pest and disease control potential, although its activity on some plant parasite nematode species is poorly investigated. The aim of the current study is to evaluate the best T. minuta propagation way, as well as the plant reaction to nematodes such as Heterodera glycines, Meloidogyne incognita and Pratylenchus brachyurus, through nematode penetration and reproduction studies and root morphological assessments. Seedlings obtained from woody cuttings showed larger rooting and stem diameter. Heterodera glycines penetration was higher than that recorded for M. incognita. However, both species recorded reproduction factor (RF) lower than one, as well as maximum RF values 0.34 and 0.02 for H. glycines and M. incognita, respectively. The highest FR recorded for T. minuta were found in P. brachyurus (0.96 and 0.80) in the 60th and 80th day after inoculation (DAI). Root anatomy changes were observed in the 80th DAI in plants inoculated with P. brachyurus. Tagetes minuta was resistant to all nematodes; however, it did not prevent P. brachyurus activity in its roots.

scholarly journals Comparação entre Técnicas de Coloração de Raízes de Soja Infectadas por Heterodera glycines, Meloidogyne incognita e Pratylenchus brachyurus

2018 ◽  
Vol 1 (1) ◽  
pp. 100
Author(s):  
Fernando Godinho de Araújo ◽  
Kássia Aparecida Garcia Barbosa ◽  
Leonardo De Castro Santos ◽  
Renato Andrade Teixeira ◽  
Mara Rubia da Rocha
Keyword(s):  
Meloidogyne Incognita ◽  
Heterodera Glycines ◽  
Pratylenchus Brachyurus

Conduziu-se experimento em casa de vegetação para avaliar a eficiência de duas técnicas de coloração de raízes de soja cultivar Emgopa 313, infectadas pelos três principais fitonematóides que afetam a cultura: Heterodera glycines, Meloidogyne incognita e Pratylenchus brachyurus. Foram realizadas três avaliações aos 10, 17 e 25 dias após o plantio da soja em solo naturalmente infestado, com os nematóides avaliados. A técnica empregando clareamento com NaOCl e fucsina ácida e a técnica que emprega lacto-glicerol e fucsina ácida foram eficientes na coloração dos nematóides, permitindo a sua visualização no interior do tecido radicular. Em função da duração do ciclo de vida do P. brachyurus não foi possível a visualização desses nematóides nos tecidos radiculares na primeira avaliação empregando a técnica do clareamento e coloração com fucsina ácida, e na segunda avaliação, em ambas as técnicas testadas. Para tecidos mais tenros a técnica que emprega o clareamento seria a mais indicada por facilitar a visualização dos nematóides, já que os tecidos sofrem certa descoloração, e por utilizar uma menor quantidade de corante, o que auxilia no processo de descoloração.

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