Biologia de Psyllobora confluens alimentada com o fungo Erysiphe cichoracearum

Santos-Cividanes, Terezinha Monteiro dos; Cividanes, Francisco Jorge; Matos, Beatriz de Almeida de

doi:10.1590/s0100-204x2007001200002

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…The yield obtained in the winter crop (10.19 Mg ha -1 ) was significantly lower than that of the summer crop but was considered as satisfactory because, according to Filgueira (2008), the temperature in this period is a limiting factor for the continuous production of okra. The dry season also favors the development and proliferation of powdery mildew (Erysiphe cichoracearum), which is the reason why this disease began to be considered as the most important one in the winter (Cividanes, Cividanes, & Matos, 2007), leading to the largest losses in marketable yield.…”

Section: Resultsmentioning

confidence: 99%

Yield of Organic Okra Irrigated Under Different Methods of Conduction and Growing Periods

Fortuna¹,

Carvalho²,

Gomes³

et al. 2023

Rev. Contemp.

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Okra is traditionally grown in the summer, but its cultivation in the winter can bring profitability to the producer, due to the low offer of the product, especially if grown in an organic production system. This study aimed to evaluate the yield and fruit quality of okra in organic system, in summer (SM), ratoon (RT) and winter (WN) crops. The field experiments were carried out in the SIPA (Agroecological Production Integrated System) and the total yield, marketable yield, and some quality parameters such as major and minor defects, curvature and size of fruits were evaluated in the three periods. Okra yield and fruit quality were influenced by the growing period and methods of conduction, and marketable yields of 18.3, 3.0 and 10.2 Mg ha-1 were found for SM, RT and WN, respectively. The producer should opt for a new planting during the winter instead of growing the ratoon from the summer crop.

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Section: Resultsmentioning

confidence: 99%

Yield of Organic Okra Irrigated Under Different Methods of Conduction and Growing Periods

Fortuna¹,

Carvalho²,

Gomes³

et al. 2023

Rev. Contemp.

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“…1, compreendendo 6,54% das coletas, com 50 indivíduos (Figura 1). Todas as espécies coletadas são registradas como predadores, com exceção do gênero Psyllobora, reconhecido com micófago (Santos-Cividanes et al 2007). Foi possível observar que no primeiro ano completo de amostragem a população de Coccinellidae era abundante e equilibrada em termos de riqueza de espécies (477 indivíduos ao total e 36 espécies), havendo uma queda de 60,16% no número de indivíduos e uma queda de 19,44% no número de espécies, no segundo ano de amostragem (287 indivíduos e 29 espécies).…”

Section: Resultsunclassified

Diversidade e sazonalidade de coccinelídeos (Coleoptera: Coccinellidae) em pomar no município de Ponta Grossa, Paraná

et al. 2019

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Resumo. Uma análise sobre a flutuação populacional da entomofauna associada a culturas de interesse econômico pode fornecer subsídios para o manejo integrado de pragas. Dentre os grupos economicamente relevantes podemos citar os coccinelídeos, conhecidos por serem predadores naturais de pragas agrícolas como afídeos. O presente trabalho se faz necessário visto que os Campos Gerais ainda carecem de dados sobre Coccinellidae relacionados a pomares de árvores frutíferas. O estudo foi realizado no pomar do Colégio Agrícola Estadual Augusto Ribas (Ponta Grossa-PR) de julho de 2004 a junho de 2006. As coletas foram feitas usando cada espécie do pomar, sendo elas agrupadas em dois grupos: cítricas e decíduas. Harmonia axyridis (Pallas) foi a espécie mais representativa na amostragem, compreendendo 38,35 % das coletas. as árvores cítricas apresentaram o maior número de insetos totalizando 82,19% da amostragem. É pertinente sugerir que a presença da H. axyridis pode ter afetado a diversidade da comunidade local, sendo ela uma espécie invasora e considerada uma melhor competidora. As árvores cítricas se apresentaram como as mais diversas. Podemos atribuir essa distribuição a maior presença de afídeos nas árvores cítricas, que foram atraídos pelos óleos voláteis secretados por essas plantas. No período final da amostragem houve uma queda populacional, que pode ser atribuída a condições climáticas desfavoráveis, e consequente redução a abundância dos afídeos presa e dos próprios coccinelídeos. Uma maior quantidade de recursos de presa permitiria que mais espécies de joaninhas coexistissem sem competir fortemente. Uma pesquisa futura poderia comparar situação da comunidade, analisando a influência da H. axyridis nas espécies locais.Diversity and seasonality of coccinellids (Coleoptera: Coccinellidae) in an orchard in the city of Ponta Grossa, ParanáAbstract. An analysis of the population fluctuation of entomofauna associated with crops of economic interest can provide subsidies for integrated pest management. Among the economically relevant groups we can mention the Coccinellidae, known to include natural predators of agricultural pests such as aphids. The present work is necessary since Parana's Campos Gerais still lack data on Coccinellidae related to orchards of fruit trees. The study was conducted in the orchard of Augusto Ribas State Agricultural College (Ponta Grossa-PR) from July 2004 to June 2006. Samples were collected from each species of the orchard, grouped into two groups: citrus and deciduous. Harmonia axyridis (Pallas) was the most representative species in the sample, comprising 38.35% of the collections. Citrus trees had the highest number of insects totaling 82.19% of the sample. It is pertinent to suggest that the presence of H. axyridis may have affected the diversity of the local community, being an invasive species and considered a better competitor. The citrus trees presented themselves as the most diverse. We can attribute this contribution to the greater presence of aphids in the citrus trees, which were attracted by the volatile oils secreted by these plants. In the final period of sampling there was a decrease in population size, which can be attributed to unfavorable climatic conditions, and consequent reduction in the abundance of prey aphids and of the coccinellids themselves. A greater amount of prey resources would allow more species of ladybugs to coexist without competing strongly. A future research could compare community situation by analyzing the influence of H. axyridis on local species.

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“…Altogether, the interspecific relationship between fungi, insects, and plants suggests that the fungivory attribute of some insects may be useful for biological control of fungal pathogens. Thus, this approach associated with sustainable integrated management strategies may reduce the use of fungicides for controlling fungal diseases in plants (Mondy and Corio-Costet, 2004;Cividanes et al, 2007;Tabata et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Fungivory: a new and complex ecological function of Doru luteipes (Scudder) (Dermaptera: Forficulidae)

Silva¹,

Mendes

Parreira

et al. 2022

Braz. J. Biol.

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We report the discovery that the earwig predator Doru luteipes (Scudder, 1876) (Dermaptera: Forficulidae) feed on Puccinia polysora Underw uredospore, the causal agent of Southern Rust of Corn (SRC), which is a primary disease affecting the maize crop in Brazil. We performed experiments in laboratory and greenhouse to test the effect of D. luteipes (1st/2nd and 3rd/4th instars, and adults) fungivory on the P. polysora uredospore concentration. All trials showed a significant reduction of the initial concentration of uredospore. There was a reduction in uredospore concentration with increase in number of D. luteipes feeding on them. We also tested the uredospore consumption by quantifying its percentage in the feces of D. luteipes. Nymphs of the 2nd, 4th instar and adults fed 88%, 85%, and 83.8% of the uredospore, respectively. For nymphs of the 3rd instar, the percentage of uredospore consumption (75.6%) was statistically significant compared with the other groups. In greenhouse experiment, at twenty-eight days after plant inoculation with 9.9 x 104 uredospores, the percentage of uredospore consumption was 81.7%. Our results confirmed the fungivory of D. luteipes on P. polysora uredospore. This is the first report of D. luteipes fungivory, which may play an important role in the biological control of P. polysora in corn.

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Biologia de Psyllobora confluens alimentada com o fungo Erysiphe cichoracearum

Cited by 9 publications

References 4 publications

Yield of Organic Okra Irrigated Under Different Methods of Conduction and Growing Periods

Yield of Organic Okra Irrigated Under Different Methods of Conduction and Growing Periods

Diversidade e sazonalidade de coccinelídeos (Coleoptera: Coccinellidae) em pomar no município de Ponta Grossa, Paraná

Fungivory: a new and complex ecological function of Doru luteipes (Scudder) (Dermaptera: Forficulidae)

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