Reproduction of Pratylenchus zeae on Weeds

Bellé, Cristiano; Kaspary, Tiago Edu; Kuhn, Paulo Roberto; Schmitt, Jairo Lizandro; Lima-Medina, Israel

doi:10.1590/s0100-83582017350100006

Cited by 14 publications

(12 citation statements)

References 19 publications

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“…The susceptibility of weeds to M. javanica and M. incognita and their resistance to herbicides favour the reproduction and persistence of nematodes in the field. Ipomoea grandifolia , D. horizontalis , A. deflexus and S. halepense were shown to be susceptible to Pratylenchus brachyurus (Godfrey, 1929) and Pratylenchus zeae (Graham, 1951) and other nematodes that affect soyabean crops (Bellé et al ., , 2017b).…”

Section: Discussionmentioning

confidence: 99%

Weed hosts of Meloidogyne spp. and the effect of aqueous weed extracts on egg hatching

et al. 2019

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Summary Weeds have a great economic impact on agricultural production because they compete with crops for resources and are alternative hosts for pests, microbial pathogens and plant‐parasitic nematodes. This study aimed to investigate the susceptibility of weeds to the root‐knot nematodes Meloidogyne javanica and Meloidogyne incognita and assess the effect of aqueous weed extracts on M. javanica egg hatching. Four experiments were conducted, two for each nematode species. Weeds were inoculated with 2000 nematode eggs and grown for 60 days under greenhouse conditions. Soyabean cv. Monsoy 7110 was used as control. The weeds Ipomoea grandifolia, Solanum americanum, Digitaria horizontalis, Amaranthus deflexus, Sorghum halepense and Commelina benghalensis were susceptible to M. javanica and M. incognita in at least one experiment (reproduction factor, RF >1). Crotalaria juncea and Eleusine indica were susceptible to M. incognita in one experiment, and Digitaria insularis, Sida rhombifolia, Bidens pilosa, Urochloa decumbens, Crotalaria breviflora, Cenchrus echinatus, Crotalaria ochroleuca and Crotalaria spectabilis were immune or resistant (RF <1 or RF = 0). Alternanthera tenella, C. juncea, S. rhombifolia, C. ochroleuca, C. spectabilis, C. breviflora, B. pilosa, E. indica, U. decumbens and C. echinatus were resistant or immune to M. javanica (RF <1 or RF = 0). Compared with the control (water), all weed extracts reduced M. javanica egg hatch. Our results highlight the importance of weed control in agricultural systems, as nematodes can survive and multiply in weed roots during the off‐season. Weed leaves and shoots, however, may be an interesting source of compounds with nematicidal activity.

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Section: Discussionmentioning

confidence: 99%

Weed hosts of Meloidogyne spp. and the effect of aqueous weed extracts on egg hatching

et al. 2019

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“…Os valores das diferentes variáveis obtidos em cada repetição foram submetidos à análise de variância, sendo as médias de cada tratamento comparadas entre si pelo teste de agrupamento de Scott-Knott a 5% de probabilidade de erro, utilizando-se o software GENES (CRUZ, 2006). (BELLÉ et al, 2017;BELLÉ et al, 2019), além de suscetíveis ao nematoide-das-lesões Pratylenchus zeae e Pratylenchus brachyurus (BELLÉ et al, 2015;BELLÉ et al, 2017).…”

Section: Materiais E Métodosunclassified

Efeito De Diferentes Tensões De Água No Solo No Feijoeiro Irrigado Na Região De Alegrete-Rs

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et al. 2019

Ciências Agrárias: Campo Promissor Em Pesquisa 5

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“…Pratylenchus zeae has been detected in the main sugarcane producing regions of Brazil, usually in high population concentrations in commercial production areas of the state of São Paulo (NOVARETTI et al, 2014), Northeast region (MOURA et al, 2000), Paraná (SEVERINO; DIAS-ARIEIRA; TESSMANN, 2010), and Rio Grande do Sul (BELLÉ et al, 2017). Alone, or in mixed populations with Meloidogyne spp., the pathogen causes average reductions of 20-30% in yield from the first cut of susceptible varieties (DINARDO-MIRANDA, 2005), as well as losses of 10-20 t ha -1 per cut and reductions in ratoon longevity (BARROS; MOURA; PEDROSA, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, Pratylenchus brachyurus has become a major concern in areas planted with soybean, maize, sugarcane, and cotton (SEVERINO; DIAS-ARIEIRA; TESSMANN, 2010;INOMOTO, 2011;MACHADO;FERRAZ;INOMOTO, 2012;BELLÉ et al, 2017). In soybean crops, losses of 30-50% in production were recorded (DIAS; GARCIA; SILVA, 2010).…”

Section: Introductionmentioning

confidence: 99%

REPRODUCTION OF Pratylenchus zeae AND P. brachyurus IN COVER CROPS

et al. 2019

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This study aimed to evaluate the reproduction of Pratylenchus zeae and P. brachyurus in leguminous plants used as cover crops. Seedlings of sunn hemp (Crotalaria juncea and C. spectabilis), pigeon pea cultivar IPR 43 (Cajanus cajan), dwarf velvet bean (Mucuna deeringiana), black velvet bean (Stizolobium aterrimum), and jack bean (Canavalia ensiformis) were inoculated with each nematode separately. Maize cultivar IPR 114 and soybean cultivar Pintado were used as controls to measure the viability of the inoculation of P. zeae and P. brachyurus. After 90 days of inoculation, the plants were collected and nematode g -1 root, final population, and reproduction factors (RF) were evaluated. The experiment was carried out at two different times of the year. The nematode's RF on cover crops from treatments with the two Crotalaria species, dwarf pigeon pea, and black velvet bean were lower than one (bad host plants) in both experiments for P. zeae. For P. brachyurus, the lowest RFs were obtained for C. juncea, C. spectabilis, and pigeon pea, while the other plants presented RF values close to or higher than one in at least one of the experiments. Therefore, C. spectabilis, C. juncea, and C. cajan cultivar IPR 43 are antagonistic plants that represent useful options for rotation or succession systems that aim to control P. zeae and P. brachyurus. REPRODUÇÃO DE Pratylenchus zeae E P. brachyurus EM PLANTAS DE COBERTURARESUMO -O trabalho teve como objetivo avaliar a reprodução de Pratylenchus zeae e P. brachyurus em plantas leguminosas usadas como adubos verdes. Plântulas de crotalária (Crotalaria juncea e C. spectabilis), guandu cv. IPR 43 (Cajanus cajan), mucuna-anã (Mucuna deeringiana), mucuna-preta (Stizolobium aterrimum) e feijão-de-porco (Canavalia ensiformis) foram inoculadas com ambos nematoides separadamente. O milho cv. IPR 114 e a soja cv. Pintado foram utilizadas como testemunhas da viabilidade do inóculo de P. zeae e P. brachyurus. Após 90 dias da inoculação, as plantas foram coletadas avaliando-se nematoide g -1 de raiz, população final e fator de reprodução (FR). O experimento foi conduzido em duas épocas distintas. Os FRs dos nematoides nas duas espécies de crotalárias, no guandu e na mucuna-preta foram menores que um em ambos os experimentos para P. zeae, comportando como más hospedeiras. Para P. brachyurus, os menores valores de FRs foram obtidos em C. juncea, C. spectabilis e guandu, enquanto nas demais leguminosas, os valores de FR foram próximos ou superiores a um em pelo menos um dos experimentos. Portanto, C. spectabilis, C. juncea e C. cajan cv. IPR 43 são opções de plantas antagonistas para sistemas de rotação ou sucessão que visem o controle de P. zeae e P. brachyurus.Palavras-chave: Adubos verdes. Leguminosas. Multiplicação. Nematoide das lesões radiculares.

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Reproduction of Pratylenchus zeae on Weeds

Cited by 14 publications

References 19 publications

Weed hosts of Meloidogyne spp. and the effect of aqueous weed extracts on egg hatching

Weed hosts of Meloidogyne spp. and the effect of aqueous weed extracts on egg hatching

Efeito De Diferentes Tensões De Água No Solo No Feijoeiro Irrigado Na Região De Alegrete-Rs

REPRODUCTION OF Pratylenchus zeae AND P. brachyurus IN COVER CROPS

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