scholarly journals Influence of Meloidogyne incognita race 1 on the development of clones of Coffea canephora, variety “Jequitibá Incaper 8122”

2020 ◽  
Vol 87 ◽  
Author(s):  
Lilian Katiany Castello Rabello Zinger ◽  
Fernando Domingo Zinger ◽  
Fábio Ramos Alves ◽  
Waldir Cintra de Jesus Junior ◽  
Angelo Oliveira Gonçalves ◽  
...  
Keyword(s):  
Coffea Canephora ◽  
Root Knot Nematode ◽  
Fresh Matter ◽  
Second Stage ◽  
Final Population ◽  
Randomized Design ◽  
Race 1 ◽  
Number Of Leaves ◽  
Completely Randomized Design ◽  
Reproduction Factor

ABSTRACT: Root-knot nematode is one of the most important phytosanitary problems for Conilon coffee, as it reduces productivity and is difficult to handle. We aimed at studying the infectivity and damage caused by M. incognita race 1 in the “Jequitibá Incaper 8122” intermediate maturity coffee variety. The experiment was conducted in a greenhouse, in completely randomized design, with five replicates. The clones composing the variety “Jequitibá Incaper 8122” were inoculated with 2,000 eggs + second-stage juveniles of M. incognita race 1. Uninoculated plants were the control. Evaluations were performed 180 days after inoculation, considering the plant height (H), stem diameter (SD), number of leaves (NOL), leaf area (LA), number of plagiotropic branches (NPB), number of nodes (NN), chlorophyll content (CHLO), shoot dry matter (SDM), root fresh matter (RFM), final population (FNP), and reproduction factor (NRF). The nematode reduced NOL in clones 208 and 209, NRF in clones 201, 203, 207 and 208, NN in clones 203, 207, 208 and 209, CHLO in clones 201, 204, 206, 207 and 209, SDM in clones 201, 203, 204 and 205 and RFM in clones 205 and 207. M. incognita race 1 FNP and NRF were larger in clones 208, 201, 207 and 203. Clone 202 had FNP and NRF equal to zero, being immune to the nematode. Clone 206 presented the lowest NRF value among clones parasitized by M. incognita.

scholarly journals Seed treatment for management of Meloidogyne javanica in soybean

2017 ◽  
Vol 38 (5) ◽  
pp. 2995 ◽  
Author(s):  
Adriely Alves de Almeida ◽  
Vinicius Hicaro Frederico Abe ◽  
Ricardo Marcelo Gonçalves ◽  
Maria Isabel Balbi-Peña ◽  
Débora Cristina Santiago
Keyword(s):  
Seed Treatment ◽  
Meloidogyne Javanica ◽  
Vitro Assay ◽  
Juvenile Mortality ◽  
Second Stage ◽  
Final Population ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Soybean Plants

The objective of this study was to evaluate the efficacy of the active ingredient abamectin, either in isolation or in combination with fungicides and insecticides formulated for the industrial seed treatment, on the population of Meloidogyne javanica, tested under greenhouse and in vitro conditions. In both tests, the combination of the following treatments was assessed: abamectin; thiamethoxam; fludioxonil + metalaxyl-M + thiabendazole. Water was used as control for the in vitro assay, whereas under greenhouse conditions, controls were inoculated and not inoculated with M. javanica. The tests were conducted in a completely randomized design with six (in vitro) and ten (greenhouse) replicates. For in vitro studies the effect on hatching, motility, and mortality of juveniles of M. javanica was evaluated. Under greenhouse conditions, the soybean ‘BRS 133’ seeds were treated, and at 15, 30, and 60 days after inoculation (DAI) with M. javanica, plant measurements were recorded. The penetration of second stage juveniles (J2) was also evaluated at 15 DAI. At 30 DAI, galls, egg masses, nematodes/g of root, and final population were evaluated. At 60 DAI, the final population of nematodes in the roots was quantified. The treatments containing abamectin were the most effective in diminishing the hatching of juveniles. All treatments had an effect on nematode motility when compared to the control, and in the treatment containing only abamectin, total juvenile mortality was observed. In greenhouse conditions, at 15 DAI, the treated soybean plants had the highest root mass and shoot length, differing statistically from the inoculated control. All treatments reduced the number of nematodes per gram of root, differing from the control. At 30 DAI, treatment efficiency was observed in reducing the final population of M. javanica, particularly the treatments using abamectin, and abamectin + thiamethoxam + fludioxonil + metalaxyl-M + thiabendazole. However, at 60 DAI, the effect of the treatments on the population of M. javanica did not persist.

scholarly journals Do the stage of plant and initial population of root knot nematode influence on sweet pepper development?

O Biológico ◽  
2020 ◽  
Vol 82 (1) ◽  
pp. 1-10
Author(s):  
Samara A. de Oliveira ◽  
Juliana M. O Rosa ◽  
Juliana Eulálio ◽  
Claudio Marcelo G. de Oliveira
Keyword(s):  
Sweet Pepper ◽  
Initial Population ◽  
Root Knot Nematode ◽  
One Pot ◽  
Leaf Pair ◽  
Final Population ◽  
Randomized Design ◽  
Meloidogyne Enterolobii ◽  
Shoot Weight ◽  
Reproduction Factor

The aim of this study was to investigate the response of three different stages (one, three and five leaf pairs) of sweet pepper (Capsicum annuum cv. Orazio) seedlings to five inoculation levels of Meloidogyne enterolobii (zero (control), 300, 1000, 3000 and 10000) under greenhouse conditions. Each plant was cultivated in one pot filled with 3.8 L of substrate. The test was a completely randomized design with four replications. The plants were assessed 60 days after inoculation, plant shoot weight, final population of nematodes, and reproduction factor were measured. The results were fitted to Seinhorst model: Y = m + (1-m). ZPi –T. The results showed a tolerance limit (T) of 2,500 nematodes for plants with one and three leaf pair, and 8,500 nematodes for the five-leaf pair plant.

scholarly journals Quantification of the damage caused by Meloidogyne enterolobii in okra

2019 ◽  
Vol 54 ◽  
Author(s):  
Edgard Henrique Costa Silva ◽  
Renato Silva Soares ◽  
Heloísa Oliveira Borges ◽  
Carolina Andrade Franco ◽  
Leila Trevisan Braz ◽  
...  
Keyword(s):  
Agronomic Traits ◽  
Abelmoschus Esculentus ◽  
Second Stage ◽  
Randomized Design ◽  
Meloidogyne Enterolobii ◽  
Completely Randomized Design ◽  
Suitable Measure ◽  
Reproduction Factor ◽  
Selection Of

Abstract: The objective of this work was to estimate the damage caused by Meloidogyne enterolobii in okra (Abelmoschus esculentus) and to verify the reliability of the reproduction factor as a suitable measure for selecting resistant okra genotypes. Increasing populations of M. enterolobii - 0, 500, 1,500, 3,000, 5,000, and 7,000 eggs and second-stage juveniles (J2) per plant, - were evaluated, in a completely randomized design. The pathogen showed a parasitism pattern similar to that of M. incognita, causing a significant decrease in morphological and agronomic traits. The pathogen reproduction factor should be used in the selection of okra genotypes for tolerance to M. enterolobii, in populations above 3,000 eggs or J2.

scholarly journals Resistance sources to root-knot nematode Meloidogyne enterolobii in Solanum species

2020 ◽  
pp. 303
Author(s):  
Jadir Borges Pinheiro ◽  
Giovani Olegario da Silva ◽  
Jhenef Gomes de Jesus ◽  
Danielle Biscaia ◽  
Raphael Augusto de Castro e Melo
Keyword(s):  
Solanum Species ◽  
Experimental Unit ◽  
Egg Mass ◽  
Root Knot Nematode ◽  
Sources Of Resistance ◽  
Second Stage ◽  
Randomized Design ◽  
Meloidogyne Enterolobii ◽  
Plant Grown ◽  
Reproduction Factor

The objective of this work was to prospect sources of resistance to root-knot nematode Meloidogyne enterolobii in Solanum species with potential to be used as rootstocks for cultivated Solanaceae. Nine accessions of Solanum sessiliflorum, 27 accessions of S. lycocarpum, 21 accessions of S. acanthodes, 22 accessions of S. scinericum and 26 accessions of S. scuticum for resistance to M. enterolobii. Rutgers and Nemadoro tomatoes were used as susceptible and resistant controls, respectively. The experiment was conducted in a greenhouse at Embrapa Vegetables, Brasília-DF, Brazil, in a completely randomized design with six replications. The experimental unit was a represented by a single plant grown in a plastic pot containing 3 L of substrate. 4000 eggs and eventual juveniles of second stage M. enterolobii were inoculated per pot. At 119 days after inoculation, gall index (Gi), egg mass index (EMI), number of eggs per root gram (NE) and reproduction factor (Fr) were evaluated. Data were subjected to analysis of variance and grouping of treatments by Scott-Knott. It was verified that S. acanthodes and S. Lycocarpum are species with high resistance to M. enterolobii, with accessions being classified identified as immune. S. scuticum also has great potential, as several resistant accessions were identified, although some accessions were quite susceptible; whereas for S. subinerme only 4 resistant accessions were identified, although all others presented a reproduction factor much lower than tomato cv. Nemadoro as control; and all evaluated S. sessiliflorum accessions were susceptible.

The effect of sandy soil, bacterium dose and time on the efficacy of Pasteuria penetrans to control Meloidogyne incognita race 1 on coffee

Nematology ◽  
2007 ◽  
Vol 9 (6) ◽  
pp. 845-851 ◽  
Author(s):  
Maria Célia Cordeiro ◽  
Regina Carneiro ◽  
Pedro Cirotto ◽  
Luiz de Mesquita ◽  
Maria Ritta Almeida ◽  
...  
Keyword(s):  
Biological Control ◽  
Sandy Soil ◽  
Meloidogyne Incognita ◽  
Pasteuria Penetrans ◽  
Root Knot Nematode ◽  
Nematode Reproduction ◽  
Second Stage ◽  
Race 1 ◽  
Coffee Plants ◽  
Reproduction Factor

AbstractAn obligate parasite bacterium of the root-knot nematode, Pasteuria penetrans strain P10, isolated from Meloidogyne incognita females on banana roots in Imperatriz Maranhão State, Brazil, was evaluated in glasshouse conditions, using two doses of a dry root bionematicide (107 endospores (5.0 g/seedling) and 106 endospores (0.5 g/seedling)) on seedlings of cv. Mundo Novo coffee. The soil in which coffee seedlings were raised was inoculated previously with these two doses of P. penetrans and after 2 months the plants were transferred to soils of different textures: clay-sandy soil (38% clay, 2% silt and 60% sand) and sandy soil (17% clay, 0% silt and 83% sand). When the coffee plants were 30 cm high, they were inoculated with 20 000 eggs/plant of M. incognita race 1. The coffee plants were examined 8, 16 and 24 months after nematode plant infestation. The effectiveness of the biological control was determined by the reduction of nematode reproduction factor, which ranged from 62 to 67% in clay-sandy soil and 80 to 85% in sandy soil. The mechanism of suppression caused by the bacterium was evaluated by the percentage of infected second-stage juveniles (J2), number of endospores attached/J2 and number of infected females. The high levels of suppression were related to time, increasing from 8 to 24 months, and to the percentage of sand in the soil.

scholarly journals Damage quantification and reaction of bean genotypes (Phaseolus vulgaris L.) to Meloidogyne incognita race 3 and M. javanica

2012 ◽  
Vol 38 (1) ◽  
pp. 24-29 ◽  
Author(s):  
Leonardo Nazário Silva dos Santos ◽  
Fábio Ramos Alves ◽  
Leônidas Leoni Belan ◽  
Pablo Diego Silva Cabral ◽  
Frederico de Pina Matta ◽  
...  
Keyword(s):  
Root Nodules ◽  
Root Weight ◽  
Fresh Matter ◽  
Damage Quantification ◽  
Final Population ◽  
Randomized Design ◽  
Bean Plants ◽  
Completely Randomized Design ◽  
Moderately Resistant ◽  
Dry Matter Weight

The damage and the resistance levels of cultivars and accessions of common beans rescued in the South and mountain regions of Espírito Santo State, Brazil, to M. incognita race 3 and M. javanica parasitism were evaluated under a greenhouse. Four rescued bean genotypes ("FORT-10", "FORT-13", "FORT-16" and "FORT-19") and 2 commercial cultivars: "Pérola", and "Aporé", were tested. The cultivar "Rico-23" was included as standard of susceptibility to nematodes and non-inoculated plants constituted the control. Thus, the experiment was carried out in a completely randomized design in 3 (treatments considering nematodes) x 7 (genotypes and bean cultivars) factorial arrangement, with 7 replicates. Data were measured at 50 days after plant inoculation. For damage quantification, the following variables were evaluated: plant height (PHE), number of nodes (NNO), number of trifoliate leaves (NRT), fresh matter weight (FWE) and dry matter weight (DWE) of shoots, root weight (RWE), number of root nodules (NRO) and final population (FPO) of nematodes per root system. There were no significant differences between the effects caused by M. incognita and M. javanica, but both species showed inferior values of PHE, NNO, NRT, RWE, FWE and DWE compared to controls. Concerning the levels of resistance of bean plants to M. incognita, the genotypes "FORT-10", "FORT-13", "Aporé" and "FORT-16" behaved as moderately resistant, the cultivars "Rico 23" and "Pérola" low resistant, and the genotype "FORT-19" as highly susceptible. When parasitized by M. javanica, the beans "FORT-19", "Rico-23", "FORT-16" and "FORT-13" were low resistant, "Pérola" and "Aporé" susceptible and "FORT-10" highly susceptible.

scholarly journals Reaction of common bean genotypes to the reproduction of Meloidogyne javanica and Meloidogyne incognita

2019 ◽  
Vol 49 ◽  
Author(s):  
João Pedro Gomes da Costa ◽  
Pedro Luiz Martins Soares ◽  
Roberta Luiza Vidal ◽  
Daniel Dalvan do Nascimento ◽  
Rivanildo Ferreira Junior
Keyword(s):  
Common Bean ◽  
Meloidogyne Javanica ◽  
Assessment Criterion ◽  
Genotypic Resistance ◽  
Pests And Diseases ◽  
Second Stage ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Moderately Resistant ◽  
Reproduction Factor

ABSTRACT The production of common bean (Phaseolus vulgaris L.) may be compromised by a variety of pests and diseases, with root-knot nematodes standing out among the soil-borne pathogens that cause significant losses. It was assessed the reaction of common bean genotypes to the reproduction of these nematodes, with emphasis on the two species most frequently found parasitizing the crop: Meloidogyne javanica and Meloidogne incognita. The experiments were conducted in a greenhouse, using a completely randomized design, with 26 treatments (genotypes), ten replications and plot consisting of a pot containing one plant. Each plot was inoculated with 1,000 eggs and second-stage juveniles and assessed at 62 days after the inoculation, when the final populations were estimated. The genotypic resistance was determined based on two criteria: reproduction factor and index. All the genotypes were susceptible to M. incognita according to both assessment criteria. The IAC Alvorada, IAC Imperador, BRS Esplendor and BRS Esteio cultivars, although may be classified as resistant to M. javanica by the reproduction factor, are classified only as moderately resistant if the assessment criterion is the reproduction index.

scholarly journals PERTUMBUHAN BIBIT KOPI ROBUSTA (Coffea canephora) PADA BERBAGAI KOMPOSISI MEDIA DENGAN BOKASHI LIMBAH KULIT KOPI

2019 ◽  
Vol 17 (1) ◽  
pp. 32
Author(s):  
Nurseha Nurseha ◽  
Risvan Anwar ◽  
Yudianto Yudianto
Keyword(s):  
Dry Weight ◽  
Coffea Canephora ◽  
Medium Composition ◽  
Experimental Unit ◽  
Media Composition ◽  
Randomized Design ◽  
Wet Weight ◽  
Number Of Leaves ◽  
Completely Randomized Design ◽  
Leather Waste

This research aimed to determine the effect of media composition leather waste coffea bokashi fertilizer on the growth of coffee seedlings in the nursery playing robusta nursery and determine the best composition that can replace the use of chemical fertilizer in the coffee nursery. This research was conducted in vilage Tugu Rejo subdistrict Kabawetan Kepahiang district Bengkulu province. This study uses a completely randomized design (CRD) of the factors with 6 (six) treatment that the composition of the growing media bokashi (P). Each composition treatment was repeated four (4) times, in order to obtain 24 units of trial. Each experimental unit there are five (5) polybags, so there are 120 polybags. Each experimental unit was taken three (3) samples. These result indicate that treatment of bokashi fertilizer media leather waste coffe very significant effect on the dry weight of coffee seedlings, significant effect on plant height and weight of the wet, and no real effect on the number of leaves and stem diameter. Effect of medium composition leather waste coffe bokashi fertilizer best demonstarted high value crops 13.63 cm, wet weight of 1.82 g and 0.60 g dry weight. The use of leather waste coffee bokashi fertilizer is able to substitute inorganic fertilizer on seedling nursery play. The use of media with the composition of the piece of land sub soil mixed with four parts bokashi leather waste robusta coffee in the coffee nursery on the main nursery gives good results.

scholarly journals Intermediate resistance to nematode Meloidogyne paranaensis in Híbrido de Timor coffee genotypes

2021 ◽  
pp. 628-633
Author(s):  
Gustavo Hiroshi Sera ◽  
Lucas Eduardo Fernandes ◽  
Inês Cristina de Batista Fonseca ◽  
Dhalton Shiguer Ito ◽  
Luciana Harumi Shigueoka ◽  
...  
Keyword(s):  
Germplasm Bank ◽  
Breeding Programs ◽  
Resistance Sources ◽  
Final Population ◽  
Randomized Design ◽  
Intermediate Resistance ◽  
Completely Randomized Design ◽  
Moderate Resistance ◽  
Different Levels ◽  
Reproduction Factor

The aim of this study was to prove that Híbrido de Timor (HdT) accessions are resistance sources to Meloidogyne paranaensis. Two experiments were carried out in a greenhouse at IDR-Paraná (Londrina, Paraná State, Brazil). Open pollinated fruits were harvested from 10 accessions (HdT UFV 380-05, HdT UFV 408-10, HdT UFV 408-11, HdT UFV 408-28, HdT UFV 428-04, HdT UFV 439-14, HdT UFV 443-08, HdT UFV 445-70, HdT UFV 446-138, HdT UFV 448-75) from the EPAMIG/ UFV germplasm bank. Seeds of these accessions were sown to obtain seedlings to test the resistance to M. paranaensis. For each experiment, a completely randomized design was used with 11 treatments, eight replications and one plant per plot. Cultivar Mundo Novo IAC 376-4 was the susceptible check. Seedlings with three to four pairs of leaves were transplanted into plastic cups with a capacity of 700 mL and 1200 eggs. The J2 of M. paranaensis (IP) were inoculated after one month. The assessments were performed 134 days after inoculation, when the data of the number of eggs and J2 per gram of roots and the final population of nematodes (FP) were obtained. The reproduction factor (RF) was calculated using the formula: RF = IP / FP. To classify the resistance levels of the genotypes, the reproduction factor reduction (RFR) was used. It classified the levels from highly resistant to highly susceptible. Different levels of intermediate resistance between the accesses were observed, highlighting HdT UFV 408-28 that presented moderate resistance to M. paranaensis. HdT UFV 408-28 showed a high percentage of plants with intermediate resistance, which can be used in breeding programs aimed at resistance to M. paranaensis

scholarly journals Arabica coffee accessions originated from Ethiopia with resistance to nematode Meloidogyne paranaensis

2020 ◽  
pp. 1209-1213
Author(s):  
Melina Marques Holderbaum ◽  
Dhalton Shiguer Ito ◽  
Débora Cristina Santiago ◽  
Luciana Harumi Shigueoka ◽  
Lucas Eduardo Fernandes ◽  
...  
Keyword(s):  
Coffea Arabica ◽  
Germplasm Bank ◽  
Heterozygous Condition ◽  
Arabica Coffee ◽  
Final Population ◽  
Randomized Design ◽  
Susceptible Control ◽  
Completely Randomized Design ◽  
Reproduction Factor

The aim of this study was to evaluate the resistance of Ethiopian Coffea arabica from IAPAR’s germplasm bank to Meloidogyne paranaensis. Two experiments were carried out in a greenhouse in IAPAR, Londrina, Paraná State, Brazil. A completely randomized design was used with 15 treatments, eight replications and one plant per plot. 14 accessions of C. arabica from Ethiopia were evaluated and the cultivar Mundo Novo IAC 376-4 was used as a susceptible control. Seedlings with three to four pairs of leaves were transplanted into plastic cups with a capacity of 700 mL and 1200 eggs and/or J2 of M. paranaensis (IP) were inoculated after one month. The evaluations were performed 130 days after inoculation, when the data of the number of eggs and J2 per gram of roots, the final population of nematodes (FP) were obtained and the reproduction factor (RF) was calculated using the formula: RF = IP / FP. To classify the resistance levels of the genotypes, the reduction of the reproduction factor (RRF) was used. The Ethiopian accessions were classified from highly resistant to highly susceptible. Most of the Ethiopian coffees were highly resistant to M. paranaensis. The genotype Geisha also showed resistance, but is still in heterozygous condition.

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