Compatibility among fungicide treatments on soybean seeds through film coating and inoculation with Bradyrhizobium strains

Pereira, Carlos Eduardo; Moreira, Fátima Maria de Souza; Oliveira, João Almir; Caldeira, Carla Massimo

doi:10.4025/actasciagron.v32i4.5756

Cited by 10 publications

(14 citation statements)

References 15 publications

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“…However, when fungicides and insecticides are added to the seed, the viability of the nitrogen-fixing bacteria could be jeopardized to a point where the number of viable bacteria is not enough to infect the plant effectively and form nodules (Hartley et al, 2012;Araujo et al, 2017). Thus, the compatibility of fungicides and insecticides represents a great challenge to the seed treatment (Campo et al, 2009;Pereira et al, 2010a;Silva Neto et al, 2013;Gomes et al, 2017). Very few studies were performed to evaluate the association of pre-inoculation and industrial seed treatment (Anghinoni et al, 2017;Machineski et al, 2018), and little is known about the maximum period of time before sowing that the seed could be treated without compromising the viability of the bacteria, nodulation of the plants and soybean yield (Pereira et al, 2010b;Zilli et al, 2010).…”

Section: Inoculationmentioning

confidence: 99%

Pre-inoculation of soybean seeds: Effects on survival of Bradyrhizobium elkanii, nodulation and crop yield

Sandini¹,

Belani²,

Falbo³

et al. 2018

Afr. J. Agric. Res.

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Pre-inoculation of soybean seeds with Bradyrhizobium spp. associated with polymers could be an alternative to the conventional inoculation performed at the day of sowing. The objectives of this study were i) to determine whether the HiCoat ® technology (peat inoculant + liquid inoculant + polymer) allows the survival of B. elkanii after storage of the inoculated seeds, and ii) to evaluate whether the pre-inoculation and seed treatment reduces the physiological quality of seed and soybean yield. Soybean seeds were treated with different fungicides and insecticides associated with pre-inoculation using HiCoat ® and the seeds were stored at room temperature. The survival of B. elkanii was reduced over time with standard inoculation, however there was above 2 x 10 6 colony-forming units of B. elkanii per seed at 60 days after inoculation with HiCoat ®. Seed germination, number of nodules per plant, mass of nodules, yield, number of grains per plant and number of pods per plants were not significantly affected by the pre-inoculation and seed treatments. Our findings indicated that the fungicide and insecticide associated with HiCoat ® can be used to treat and to pre-inoculate seeds that can be stored for up to 71 days without compromising the nodulation of plants and soybean yield.

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Section: Inoculationmentioning

confidence: 99%

Pre-inoculation of soybean seeds: Effects on survival of Bradyrhizobium elkanii, nodulation and crop yield

Sandini¹,

Belani²,

Falbo³

et al. 2018

Afr. J. Agric. Res.

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“…Esta prática, já corriqueira para a cultura da soja, visa à uniformidade dos plantios e à obtenção de densidade adequada de plantas na lavoura (Pereira et al, 2010a). Entretanto, por não existirem fungicidas registrados no MAPA para o tratamento de sementes de feijão-caupi, os produtores têm adotado produtos recomendados para a cultura da soja, principalmente aqueles à base de carbendazim, carboxin, fludioxonil e thiram.…”

Section: Introductionunclassified

Compatibilidade do tratamento de sementes de feijão-caupi com fungicidas e inoculação com estirpes de Bradyrhizobium

Neto

Smiderle²,

Silva³

et al. 2013

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar a compatibilidade do tratamento de sementes com fungicidas e a inoculação com estirpes de Bradyrhizobium em feijão-caupi. Em laboratório, avaliou-se a sobrevivência de células nas sementes da cultivar BRS Guariba, tratadas ou não com fungicidas (fludioxonil, carbendazim, carbendazim + thiram e carboxin + thiram) e inoculadas ou não com Bradyrhizobium (estirpes UFLA3-84, BR 3267, INPA3-11B e BR 3262). Em casa de vegetação, conduziu-se experimento em vasos de Leonard, com os mesmos tratamentos. Foram avaliados: massa de matéria seca da parte aérea, além de número e massa de nódulos 25 dias após a emergência das plantas. No campo, dois experimentos foram conduzidos, tendo-se utilizado a estirpe BR 3262, com aplicação de fungicidas nas sementes: um em área de primeiro cultivo e outro em área cultivada anteriormente com culturas anuais. Avaliaram-se, aos 35 dias, o número de nódulos, a massa de nódulos secos e a massa de matéria seca da parte aérea, e, na colheita, a produtividade de grãos. Os fungicidas não tiveram efeito significativo sobre a sobrevivência de Bradyrhizobium, a nodulação das plantas e o rendimento de grãos, que, em média, foi superior a 1.200 kg ha -1 . O tratamento de sementes de feijão-caupi com fungicidas é compatível com a inoculação das estirpes avaliadas.Termos para indexação: Bradyrhizobium, Vigna unguiculata, fixação biológica de nitrogênio, nodulação. Compatibility of the cowpea seed treatment with fungicides and inoculation with Bradyrhizobium strainsAbstract -The objective of this work was to evaluate the compatibility of seed treatment with fungicides and Bradyrhizobium strains inoculation for cowpea. Cell survival on seeds of cultivar BRS Guariba treated or not with fungicides (fludioxonil, carbendazim, carbendazim + thiram, and carboxin + thiram) and inoculated or not with Bradyrhizobium (strains UFLA3-84, BR 3267, INPA3-11B, and BR 3262) were evaluated in laboratory.Another experiment was carried out in greenhouse, in Leonard jars, using the same treatments. The following were evaluated: shoot dry matter weight, besides number and dry matter weight of nodules 25 days after plant emergence. Two experiments were performed in the field with the strain BR 3262, with fungicides on the seeds: one in a first cultivation area and the other in an area previously cultivated with annual crops. Nodule number, nodule dry weight, and shoot dry matter weight were evaluated at 35 days, and grain yield at harvest. Fungicides did not have significant effect on Bradyrhizobium survival, plant nodulation, and grain yield, which was, in average, higher than 1,200 kg ha -1 . Cowpea seed treatment with fungicides is compatible with the inoculation of the evaluated strains.

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“…Numerous pathogens (Henning, 2005) and pests (Hoffman-Campo et al, 2000) can cause yield losses by jeopardizing seed germination and initial establishment of plants under field conditions. Hence, seed treatment has been considered as a cost-effective tool that can be used to manage pests and diseases that occur soon after sowing (Goulart, 1998;Pereira et al, 2010a). Industrial seed treatment of soybean is a practice that has gained more prominence over the last years (França-Neto et al, 2015).…”

mentioning

confidence: 99%

“…Nevertheless, industrial seed treatments still face many challenges that need to be addressed regarding the storage period of the seed and the compatibility of agrochemicals with inoculants. Previous studies demonstrated that seed treatment with fungicides and insecticides (Pereira et al, 2010a;Dan et al, 2012;Ferreira et al, 2016;Camilo et al, 2017) as well as the period of storage (Krohn and Malavasi, 2004;Dan et al, 2010;Piccinin et al, 2013) can have negative effects on physiological quality of soybean seed. As a result, seed with low vigor can decrease seedling emergence (Khaliliaqdam et al, 2012) and reduce yield (Scheeren et al, 2010), which could seriously lead to unfeasibility of industrial seed treatments.…”

mentioning

confidence: 99%

“…(Campo et al, 2009;Campo et al, 2010;Pereira et al, 2010b;Zilli et al, 2010;Costa et al, 2013;Gomes et al, 2017), and this is a challenge that needs to be addressed. Thus, new technologies have been developed with the aim of enabling pre-inoculation on soybean seeds by adding polymers to the inoculant (Fernandes Júnior et al, 2009;Silva Júnior et al, 2012), which allows better survival of the bacteria without negatively affect nodulation and crop yield (Pereira et al, 2010a).…”

mentioning

confidence: 99%

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Seed treatment and pre-inoculation of soybean: effect of storage period and agrochemicals on the physiological quality of seed and yield

Sandini¹,

Belani²,

Falbo³

et al. 2019

Afr. J. Agric. Res.

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Industrial seed treatment of soybean [Glycine max (L.) Merr.] has increased over the last years. New technologies have been developed to allow the inoculation procedure, which is traditionally done at the day of sowing, to be performed with the industrial treatment days or even weeks before sowing. Since little is known about the compatibility of agrochemicals and pre-inoculation, the objective of this study was to determine whether the storage period and the combination of fungicides and insecticides could negatively affect the physiological quality and yield of soybean seeds that were pre-inoculated. Soybean seeds received fourteen seed treatments that consisted of different fungicides and insecticides and were pre-inoculated with Bradyrhizobium elkanii. The seeds were treated and stored for 51 days until it was sown in the field. Every 17 days the physiological quality of the seed was assessed. The results shown that pre-inoculation did not affect the physiological quality of seeds. However, some combinations of agrochemicals, as well as storage period reduced seed vigor and seed germination, while increased abnormal seedlings. The findings of this study indicated that some combinations of fungicides and insecticides can have adverse effect on the physiological quality of seed that is stored for up to 51 days before sowing, but none of them jeopardized the nodulation and soybean yield under field conditions.

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Compatibility among fungicide treatments on soybean seeds through film coating and inoculation with Bradyrhizobium strains

Cited by 10 publications

References 15 publications

Pre-inoculation of soybean seeds: Effects on survival of Bradyrhizobium elkanii, nodulation and crop yield

Pre-inoculation of soybean seeds: Effects on survival of Bradyrhizobium elkanii, nodulation and crop yield

Compatibilidade do tratamento de sementes de feijão-caupi com fungicidas e inoculação com estirpes de Bradyrhizobium

Seed treatment and pre-inoculation of soybean: effect of storage period and agrochemicals on the physiological quality of seed and yield

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