Bemisia tabaci, Brevicoryne brassicae and Thrips tabaci abundance on Brassica oleracea var. acephala

Leite, Germano Leão Demolin; Picanço, Marcelo Coutinho; Jham, Gulab N.; Moreira, Márcio Dionízio

doi:10.1590/s0100-204x2005000300001

Cited by 16 publications

(27 citation statements)

References 15 publications

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“…Species of insects such as thrips which have a developmental stage in the soil are strongly influenced by rainfall (Silveira Neto et al, 1976). The results obtained in this study are in agreement with those obtained by Leite et al (2005).…”

Section: Resultssupporting

confidence: 92%

“…An increase in thrips was observed starting in the summer (Figure 1) and continuing throughout the three cycles, contrary to the results obtained by Leite et al (2005) who found no significant differences in the occurrence of T. tabaci in Brassica oleracea var. acephala.…”

Section: Resultscontrasting

confidence: 87%

“…A positive and significant correlation (p<0.0001) was found between aphid populations and precipitation (r = 0.39902 for Veronica and r = 0.43526 for Elisa lettuce). Intense or constant rain has a direct mechanical action, decreasing the populations of small insects such as thrips and aphids (Silveira Neto et al, 1976;Leite et al, 2005). However, they live in parts of the plant that provide shelter and according to Liu and Mccreight (2006) the highest concentration of aphids is within the lettuce head, while in N. ribisnigri aphid populations were higher in the outer leaves than in other leaves.…”

Section: Resultsmentioning

confidence: 99%

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Diversidad de artrópodos y moluscos asociados al cultivo de lechuga

Zawadneak

Schuber

Lavoranti

et al. 2017

Idesia

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Despite the economic importance of lettuce, no studies have examined the diversity of species associated with this crop that could contribute to the development of an ecological management of phytophagous arthropods and mollusks. This study was aimed at determining the predominant species of arthropods and mollusks in two lettuce cultivars (curly-leaf Veronica and smooth-leaf Elisa). A total of 9,638 specimens of arthropods and mollusks was collected and identified to 27 constant species, 17 classified as accessory and two as accidental species. Seven species of aphids were identified, with Nasonovia ribisnigri, Uroleucon sonchi, and Uroleucon ambrosiae as the most frequent, as well as three species of thrips, predominantly Caliothrips phaseoli and Frankliniella schultzei. Other phytophagous arthropods and mollusks occurred at frequencies below 10%. Among natural enemies, predators of the families Syrphidae (2.74%), Coccinellidae (1.66%), Staphylinidae (0.79%) and Carabidae (0.17%) and parasitoids of the order Hymenoptera (0.93%) were observed. Of the total specimens collected, 53.87% are considered phytophagous species, mostly aphids (40.82%), followed by thrips (11.35%). The aphid N. ribisnigri was the main pest species, as it forms colonies in the lettuce head and can spread plant viruses. Phytophagous pests preferred smooth over curly leaves.Key words: Lactuca sativa, pests, natural enemies, constancy index, biological control, biodiversity. RESUMEN A pesar de la importancia económica de la lechuga, no hay estudios que hayan analizado la diversidad de especies asociadas a este cultivo que podrían contribuir al manejo ecológico de los artrópodos fitófagos y moluscos. Este estudio tuvo como finalidad determinar las especies predominantes de artrópodos y moluscos en dos cultivares de lechuga (Veronica de hoja rizada y Elisa de hoja lisa

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Section: Resultssupporting

confidence: 92%

Section: Resultscontrasting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

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Diversidad de artrópodos y moluscos asociados al cultivo de lechuga

Zawadneak

Schuber

Lavoranti

et al. 2017

Idesia

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“…Several factors such as climatic conditions (Gonçalves, 1997), crop fertility status, age and growth rate (Marschner, 1995), natural enemies and leaf chemical composition (Eigenbrode & Pillai, 1998;Leite et al, 2005) can influence insect population in plants.…”

Section: Introductionmentioning

confidence: 99%

Whitefly, aphids and thrips attack on cabbage

Leite

Picanço

Jham³

et al. 2006

Pesq. agropec. bras.

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-The objective of this work was to investigate the relationships between predators and parasitoids, leaf chemical composition, levels of leaf nitrogen and potassium, total rainfall, relative humidity, daylight and median temperature on the intensity of whitefly, aphid, and thrips attack on cabbage. Whitefly, aphids and thrips population tended to proliferate in the final stage of plant or reached a peak population about 40 days after plantation. The whitefly and thrips tended to increase with an increase in the median temperature. A dependence of Cheiracanthium inclusum and Adialytus spp. populations on whitefly and aphids populations, respectively, was observed. No significant effect was detected between K and nonacosane leaf content and aphid population. However, an increase in leaf N content was followed by a decrease of this insect population. No significant relation was observed between leaf N, K and nonacosane and whitefly and thrips populations. Highest nonacosane levels were observed in plants 40 days after transplant, and relative humidity correlated negatively with nonacosane. Natural enemies, especially the parasitoid Adialytus spp. and the spiders can be useful controlling agents of the whitefly and aphids in cabbage. Median temperature can increase whitefly and thrips populations.Index terms: Bemisia tabaci, Brevicoryne brassicae, Thrips tabaci, Brassica oleracea, temperature, nonacosane. Ataque de mosca-branca, pulgões e tripes em repolhoResumo -O objetivo deste trabalho foi investigar as relações entre predadores, parasitóides, composição química foliar, níveis de nitrogênio e de potássio foliar, pluviosidade, umidade relativa, insolação e temperatura média na intensidade de ataque de mosca-branca, pulgão e tripes em repolho. As populações de mosca-branca, pulgões e tripes tenderam a aumentar no final do cultivo ou apresentaram pico 40 dias depois do transplantio. As populações de mosca-branca e tripes tenderam a aumentar sob temperaturas mais elevadas. As populações de Cheiracanthium inclusum e Adialytus spp. dependiam das populações de mosca-branca e pulgões, respectivamente. Não se detectou efeito significativo entre os níveis foliares de K e nonacosano e a população de pulgões; entretanto, aumento nos níveis de N foliar resultou em menor população da praga. Não se detectou relação significativa entre os níveis foliares de N, K e nonacosano e as populações de mosca-branca e de tripes. Altos níveis foliares de nonacosano foram observados 40 dias depois do transplantio, e a umidade relativa correlacionou-se negativamente com os níveis de nonacosano. Inimigos naturais, especialmente o parasitóide Adialytus spp. e as aranhas, podem ser agentes de controle biológico eficazes de mosca-branca e pulgões em repolho. A temperatura pode aumentar as populações de mosca-branca e tripes.Termos para indexação: Bemisia tabaci, Brevicoryne brassicae, Thrips tabaci, Brassica oleracea, temperatura, nonacosano.

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“…5). As médias seguidas pela mesma letra na linha não diferem, entre si, pelo teste de média de Scott-Knott ao nível de 1% de significância Os insetos, com destaque para os sugadores, atacam preferencialmente as folhas apicais, principalmente a face inferior no início do cultivo, por estas serem mais tenras, com menores quantidades de cálcio e de fibras, e de alto valor nutricional com alto teor de nitrogênio (CHAU et al, 2005;LEITE et al, 2002LEITE et al, , 2005SANTOS et al, 2003;SILVA et al, 1998). Em contraste, no presente trabalho foi observado maior ataque de cigarrinhas na face superior, provavelmente devido à maior presença de tricomas na face inferior.…”

Section: Methodsunclassified

Artrópodes fitófagos e predadores associados em 20 acessos Luffa sp. em sistema orgânico

Leite¹,

Moreira²,

Mota³

et al. 2011

Rev. Ciênc. Agron.

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Resumo -Os objetivos desta pesquisa foram verificar os artrópodes fitófagos e seus predadores em 20 acessos de bucha vegetal Luffa sp. (Cucurbitaceae), a distribuição destes no dossel das plantas em cultivo orgânico e a produção de frutos dos acessos. O experimento foi em blocos casualizados com 20 tratamentos e quatro repetições. Os tratamentos foram os acessos P159, P304, P466, P03, P570, P569, P467, P30, P446, P495, P125, P263, P644 e P32, provenientes da Embrapa (CENARGEN, DF), e P01, P02, P04, P05, P06 e P07, obtidos em Porteirinha-MG. As parcelas foram compostas por quatro plantas de Luffa sp. A maior abundância de Diabrotica speciosa (Germar) (Coleoptera: Chrysomelidae) foi observada nas folhas do acesso P467 em referência aos demais acessos de Luffa sp. Trigona spinipes (Fabricius) (Hymenoptera: Apidae) foi mais observada nas flores dos acessos P01, P03, P30, P32, P263 e P569 e menos abundantes nos acessos P05, P125, P159, P304, P446 e P570. Os acessos de Luffa sp. com maior número de frutos/planta foram P01, P03, P05, P06, P07, P30, P32, P125, P263, P446 e P570. Os predadores aranhas e Coccinellidae (Coleoptera) bem como o fitófago Cicadellidae (Hemiptera) preferiram atacar a face adaxial, sendo que não se detectou diferença estatística entre as faces para os demais artrópodes. T. spinipes esteve mais presente na parte apical do dossel das plantas. Com esses resultados, o acesso P06 é o mais indicado para o cultivo, pois foi um dos que apresentou maiores produtividades e menores taxas de ataque de insetos. Palavras-chave -Bucha vegetal. Inseto. Inimigos naturais.Abstract -The objectives of this research were to verify the phytophagous arthropods and their predators in 20 accesses of vegetable loofah Luffa sp. (Cucurbitaceae), the distribution of the canopy of the plants in organic system and the production of fruits of the accesses. The experiment was in randomized blocks designed with 20 treatments and four replicates. The treatments were the accesses P159, P304, P466, P03, P570, P569, P467, P30, P446, P495, P125, P263, P644 and P32, from Embrapa (CENARGEN, DF, Brazil) and P01, P02, P04, P05, P06 and P07, obtained in Porteirinha, MG, Brazil. Each plot consisted of four plants Luffa sp. The greatest abundance of Diabrotica speciosa (Germar) (Coleoptera: Chrysomelidae) was observed in leaves of the access P467 in reference to the others accessions of Luffa sp.. Trigona spinipes (Fabricius) (Hymenoptera: Apidae) was observed in most flowers of accesses P01, P03, P30, P32, P263 and P569 and less abundant in accesses P05, P125, P159, P304, P446 and P570. The accesses of Luffa sp. highest number of fruits per plant were P01, P03, P05, P06, P07, P30, P32, P125, P263, P446 and P570. The spiders and predatory Coccinellidae (Coleoptera) and the phytophagous Cicadellidae (Hemiptera) preferred to attack the adaxial side, but no statistical difference was detected between the faces to the other arthropods. T. spinipes was present in the apical part of the plant canopy. With these results, access P06 is the most sui...

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Bemisia tabaci, Brevicoryne brassicae and Thrips tabaci abundance on Brassica oleracea var. acephala

Cited by 16 publications

References 15 publications

Diversidad de artrópodos y moluscos asociados al cultivo de lechuga

Diversidad de artrópodos y moluscos asociados al cultivo de lechuga

Whitefly, aphids and thrips attack on cabbage

Artrópodes fitófagos e predadores associados em 20 acessos Luffa sp. em sistema orgânico

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