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Search Results: 1 - 10 of 4036 matches for " Root-knot nematodes "
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Reaction of vegetables and aromatic plants to Meloidogyne javanica and M. incognita
Dias-Arieira, Cláudia Regina;Cunha, Tatiana PL da;Chiamolera, Fernando Marcelo;Puerari, Heriksen H;Biela, Fabio;Santana, Simone de M;
Horticultura Brasileira , 2012, DOI: 10.1590/S0102-05362012000200023
Abstract: for this research we used 15 day-old seedlings which were transplanted to 2 l pots and inoculated with 4,000 nematode eggs plus juveniles (j2). after 60 days, the root systems were removed and the number of galls and eggs evaluated and used to calculate the nematode reproduction factor (rf). the tomato cv. santa cruz was used as a susceptible control. the experimental design was completely randomized, with six replications. averages were compared using the tukey or scott-knott test at 5%. for lettuce, salad bowl (mimosa type), elizabeth and elisa (lisa) and vera cultivars (crisphead), the number of galls and the rf for m. javanica were statistically higher than for the control, whereas, for the other vegetable crops, the highest number of galls and eggs were found in chicory and basil. the highest susceptibility to m. incognita was observed in mimosa lettuce cv. salad bowl, chicory cultivars, parsley cv. graúda portuguesa and basil. marjoram exhibited no m. incognita galls.
Comportamento de diversas plantas daninhas, de ocorrência comum no estado de S?o Paulo, em rela??o a duas espécies de nematóides das galhas: primeira parte
Ferraz, L.C.C.B.;
Planta Daninha , 1985, DOI: 10.1590/S0100-83581985000100002
Abstract: the behaviour of ten different weed species belonging to amaranthaceae, commelinaceae, compositae, convolvulaceae and euphorbiaceae in relation to the root-knot nematodes meloidogyne incognita race 4 and m. javanica was studied under greenhouse conditions. evaluations were carried out 50 days after the nematode inoculations, by means of gall and egg masses indexes observed in the root systems and through the determination of height and/or top dry weight of the plants. alternanthera ficoidea and ipomoea acuminate were considered highly suscetible to both nematode species; amaranthus hybridus var. patul us and commelina virgunica were tolerant to the arasites whereas euphorbia heterophylla showed low susceptibility; acanthospernum hispidum was conside red moderately suscetible to m. javanica and highly resistant to m. incognita race 4; all other weeds - blainvillea rhomboidea, croton glandulosus, emilia sonchifolia and tagetes minuta - were highly resistant to the nematodes.
Comportamento de diversas plantas daninhas, de ocorrência comum no estado de S?o Paulo, em rela??o a duas espécies de nematóides das galhas: segunda parte
Ferraz, L.C.C.B.;
Planta Daninha , 1985, DOI: 10.1590/S0100-83581985000100003
Abstract: the behavior of ten different weed species belonging to gramineae, labiatae and leguminosae in relation to the root-knot nematodes meloidogyne incognita (race 4) and m. javanica was studied under greenhouse conditions. evaluations were carried out 50 days after nematode inoculations (28,000 eggs/plant) by means of gall and egg masses indexes observed in the root systems and through the determination of height and/or top dry weight of the plants. brachiaria plantaginea, cenchrus echinatus, digitaria horizontalis and elcusine indica were very unfavourable hosts for the parasites, whereas and indigofera truxillensis showed low susceptibility and hyptis lophanta was moderately susceptible. leonotis nepetaefolia was highly susceptible and echinochloa colonum tolerant to the parasites.
Efeito de diferentes laminas de irriga??o sobre a popula??o de meloidogyne javanica e a produtividade de bananeira no norte de minas gerais
Ribeiro, Regina Cássia Ferreira;Costa, Cristiane Correa;Xavier, Adelica Aparecida;Figueiredo, Flávio Pimenta de;Oliveira, Flávio Gon?alves;Campos, Vicente Paulo;Dias-Arieira, Claudia Regina;Mizobutsi, Edson Hyidu;
Revista Brasileira de Fruticultura , 2009, DOI: 10.1590/S0100-29452009000100014
Abstract: the present work aimed to assess in the field the effect of irrigation different levels (100%, 125%, 150% and 175%) determined by evapotranspiration from the tank class a (ettca), on the population of meloidogyne javanica in the soil, banana productivity and number of days needs for flowering and yield of prata-an? cultivar of banana on the north of minas gerais state, brazil. the number of second stage juveniles of m. javanica increased reaching the maximum j2 level at 118% of ettca. the irrigation levels, 125, 150 and 175% ettca increased the banana productity in kg/ha-1 significantly as compared to 100% level. however, no effect was observed on the number of days for flowering and for harvesting of prata-an? banana.
REPRODU??O DE Meloidogyne incognita RA?A 2 E DE Meloidogyne javanica EM OITO ESPéCIES DE PLANTAS MEDICINAIS
Scientia Agricola , 1996, DOI: 10.1590/S0103-90161996000200007
Abstract: the reproductive rates of the root-knot nematodes meloidogyne incognita race 2 and m. javanica in the roots of eight medicinal plant species were assessed under greenhouse condition. each plant, growing in a pot containing 500 ml of sterilized soil, was inoculated with an average number of 5,000 eggs, with five repetitions. egg mass index and reproduction factor data were used for the evaluation, 45-55 days after plant inoculation. achillea millefolium, arctium lappa, bryophyllum calycinum, and crassula portulacea were rated as poor or nonefficient hosts, while plectranthus barbatus and polygonum hidropiperoides were efficient for both nematode species. achyrocline satureoides and tropaeolum majus were efficient for m. javanica, but nonefficient for m. incognita.
Estudo Comparativo da Biologia de Meloidogyne enterolobii (= M. mayaguensis) e Meloidogyne javanica em tomateiros com gene Mi
Westerich, J.N.;Rosa, J.M.O.;Wilcken, S.R.S.;
Summa Phytopathologica , 2011, DOI: 10.1590/S0100-54052011000100006
Abstract: in order to know the host parasite relationship of m. enterolobii in plants with resistance to nematodes, comparative studies of the biology of m. enterolobii and m. javanica in tomato with the mi gene were conducted. the experiment was set up in a two-by-two factorial design consisting of two varieties of tomato ('magnet' and 'helper m') and two species of root-knot nematodes (m. javanica and m. enterolobii) with five replicates. plants were inoculated with 500 infective juveniles (j2) of m. enterolobii or m. javanica. the root were collected at 3, 10, 17, 24 and 31 days after inoculation, stained with acid fuchsin, and dissected on stereomicroscope in order to observe the different developmental stages of nematodes. the data were subjected to analysis of variance and means compared by tukey test at 5% probability. the results showed that, although both species have been able to penetrate the roots of the rootstocks of tomato, only m. enterolobii was able to develop normally, with mature females carrying their egg masses, from 24 days after inoculation.
Plant parasitic nematodes associated with banana crop in Crete, Greece
Emmanuel A. Tzortzakakis
Acta agriculturae Slovenica , 2008, DOI: 10.2478/v10014-008-0010-9
Abstract: This is a report on the presence of Meloidogyne spp., Helicotylenchus multicintus and Pratylenchus goodeyi in roots of banana crops in Crete.
Incorporación de vermicomposta para el manejo de Nacobbus aberrans en jitomate (Lycopersicon esculentum Mill.)
Villa-Briones, A.;Zavaleta-Mejía, E.;Vargas-Hernández, M.;Gómez-Rodríguez, O.;Ramírez-Alarcón, S.;
Revista Chapingo. Serie horticultura , 2008,
Abstract: the effect of vermicompost and manure was tested for the management of nacobbus aberrans. under greenhouse conditions gall index of tomato (lycopersicon esculentum mill.) roots (gi) was reduced significantly (p≤0.05), by 27 and 40%, respectively, when vermicompost and manure were incorporated to soil, in comparison to the control with nematode and without amendments. they also increased significantly the root volume (rv) 13.1 and 14.7 more times, dry root weight (drw) 5.8 and 7 more times and dry shoot weight (dsw) 1.6 and 1.9 more times; furthermore root necrosis was reduced by 28.5 and 25%, respectively. in the field, 85 days after planting, only the variables gi, root necrosis and dsw showed significant differences among treatments; generally, plants grown in soil amended with vermicompost at 12.5 t·ha-1 (500 g·plant-1) and 7.5 t·ha-1 (300 g·plant-1) reduced gi and root necrosis, and increased dsw. the gi was significantly reduced, as compared to the control, by 29 and 28% with 7.5 and 12.5 t·ha-1 of vermicompost, respectively; similarly, they increased the dsw by 91.6 y 84.8%.
Native-plant hosts of Meloidogyne spp. from Western Paraná, Brazil
Antes, Vanessa A.;Comerlato, Anna P.;Schuelter, Adílson Ricken;Carneiro, Regina M.D.G.;Furlanetto, Cleber;
Brazilian Archives of Biology and Technology , 2012, DOI: 10.1590/S1516-89132012000200005
Abstract: the present study was focused on the parasitism of meloidogyne species on the roots of native nursery plants from the atlantic forest. native plants were selected from a commercial nursery in western paraná, searching for the natural infection of meloidogyne. also, the seeds of native plants were cultivated in sterile soil and inoculated with m. incognita. in both the experiments, the number of galls and number of eggs and j2 per root, allied to the reproduction factor of m. incognita on each inoculated plant were assessed. natural infection by m. javanica was found on cordia ecalyculata, citharexyllum myrianthum and aspidosperma subincanum and by m. incognita on croton urucurana, lonchocarpus muehlbergianus, tabebuia impetiginosa and t. serratifolia. meloidogyne incognita induced galls formation on genipa americana, schinus terebinthifolius and rollinia mucosa after inoculation, which suggested that those plants could host this nematode in natural biomes. nursery soil should be disinfested before seeding the native forest plants for reforestation purposes
Linhagens de alface-crespa para o ver?o resistentes ao Meloidogyne javanica e ao vírus mosaico-da-alface
Silva, Renata Rodrigues;Gomes, Luiz Ant?nio Augusto;Monteiro, Aline Beraldo;Maluf, Wilson Roberto;Carvalho Filho, José Luiz Sandes de;Massaroto, Jo?o Aguilar;
Pesquisa Agropecuária Brasileira , 2008, DOI: 10.1590/S0100-204X2008001000013
Abstract: the aim of this work was to select f4 lettuce families, derived from the cross 'veronica' x 'salinas 88 ', for summer cropping, type of leaves, and for resistance to meloidogyne javanica and to lettuce mosaic virus (lmv). first, evaluations were made for leaf colour, leaf limb, border type, and heat tolerance in the field, in a complete blocks desing, in 15 f4 families previously selected, parent cultivars and, as control, the cultivar regina 71 (butterleaf and tolerant to heat). five replicates and eight plants per plot were used. as second step, the families were evaluated in greenhouse, in 128-cell expanded polystyrene trays, for resistance to lmv and root-knot nematodes. score means of each family were compared to the means of each parental cultivar by dunnett test at 5% probability. family afx007b-140-21, homozygous for root-knot nematodes, for lmv and heat tolerant, was the most promising. the cross between crisp and butter leaf cultivars can originate promising lineages both with crisp and butter leaves.
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