A 6-Year Study of Spiders (Araneae) in a Quebec Apple Orchard

Dondale, C. D.; Parent, B.; Pitre, D.

doi:10.4039/ent111377-3

Cited by 31 publications

(18 citation statements)

References 8 publications

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“…The investigation of spiders is not only important because of the necessity of the above mentioned systems approach, but also because these animals comprise an important part of the polyphagous predatory complex, which under some circumstances bears with a significant controlling power over pest insects (Riechert & Lockley, 1984;Nyffeler & Benz, 1987). Data about spiders in apple orchards are scattered (Legner & Oatman, 1964;Dondale et al, 1979;Mansour et al, 1980), with only few previous studies in Central Europe (Naton, 1976;Wyss et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Spiders of the Foliage and Herbaceous Layer of an IPM Apple Orchard in Kecskemét-Szarkás, Hungary

Samu

Rácz

Erdelyi

et al. 1997

Biological Agriculture & Horticulture

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As part of a broad agroecological project, spiders were collected in different blocks of a 6 ha experimental !PM apple orchard at Kecskemet-Szarkas, Hungary, in 1994. The orchard was divided into six blocks receiving different treatments: the two "traditional" blocks were treated with conventional intensive spraying; the two "!PM" blocks were managed under an integrated pest management scheme. In the "IPM+flowers" blocks the same !PM scheme was applied and, additionally, flowering herbs were sown between tree rows. Spiders were collected by branch beating from the foliage of apple trees in all blocks, and in the IPM+flowers blocks separately from herbaceous plants by shaking. The total catch of spiders represented at least 28 species (88% of all spiders were immature). The total number of spiders caught was not significantly different between treatment blocks. Cluster analysis revealed that spider family composition was the most similar between the canopies of the various !PM blocks, the canopy fauna of the traditional blocks was somewhat different from these, while family composition of the herbaceous layer was markedly different from that of the canopy stratum in any of the blocks. Within the IPM+flowers block, species similarity was moderate between the canopy and the herbs; Oxyopidae represented a common element in both strata. The present study indicated that the applied pest management schemes did not result in any significant difference in the spider assemblage of the treatment blocks. Spiders of the herbaceous layer were of different composition, and there is little evidence that adding vegetation to the herb layer would increase spider abundance on the trees. Causative factors of this phenomenon, however, should be examined in more detail with special reference to the availability of alternative prey and dispersal from neighbouring habitats.

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Section: Introductionmentioning

confidence: 99%

Spiders of the Foliage and Herbaceous Layer of an IPM Apple Orchard in Kecskemét-Szarkás, Hungary

Samu

Rácz

Erdelyi

et al. 1997

Biological Agriculture & Horticulture

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“…1) (GREEN, 1996); um padrão bastante similar ao registrado neste estudo. Todavia, dados obtidos no Hemisfério Norte (AGNEW et al, 1985;DEAN et al, 1982;DONDALE et al, 1979) indicam que Linyphiidae, Dyctinidae e Philodromidae apresentam maior número de espécies, o que difere dos resultados verificados neste estudo.…”

Section: Resultsunclassified

“…Estes resultados diferem de registros do Hemisfério Norte, onde em pomares de maçã no Canadá coletas realizadas diretamente sobre as plantas revelaram que aranhas construtoras de teias foram as mais abundantes ultrapassando 70% do total coletado (DONDALE et al, 1979). A maior porcentagem de aranhas errantes constatada no presente estudo pode corroborar a hipótese de JOCQUÉ (1984), que sugere que em climas mais quentes aranhas construtoras de teias apresentem desvantagens sobre as aranhas errantes em termos de estratégias de predação.…”

Section: Resultsunclassified

“…II). A predominância de S. cristata verificada nas laranjeiras merece atenção especial já que neste tipo de ambiente as espécies da família Linyphiidae apresentam, em geral, baixa ou média abundância (DONDALE et al, 1979;RINALDI & RUIZ, 2002). Espécies desta família são mais comumente registradas na vegetação de cobertura do solo ou junto a este (DEAN et al, 1982;AGNEW et al, 1985;COSTELLO & DAANE, 1998).…”

Section: Resultsunclassified

“…Em pomares de maçã no Hemisfério Norte O. salticus também não foi registrada (DONDALE et al, 1979). Trabalhos realizados em plantações de cana-de-açúcar e cultivos de seringueira (RINALDI & RUIZ, 2002), confirmam a baixa abundância desta espécie em agroecossistemas com espécies vegetais de maior porte.…”

Section: Resultsunclassified

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Araneofauna de pomares de laranja Valência nos Vales do Caí e Taquari, Rio Grande do Sul, Brasil

Ott

Wolff

2007

Iheringia, Sér. Zool.

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ABSTRACT. Araneofauna of Valência orange orchards at the Caí and Taquari Valleys, Rio Grande do Sul, Brazil. Assemblages of spiders of the herbaceous vegetation were sampled by sweeping method in two sweet orange orchards (Citrus sinensis) in the south of Brazil. Each sampled orchard is characterized by receiving a different handling type: "traditional" or "ecological". In addition it was sampled the assemblage of spiders of the orange trees of the orchard with the "ecological" handling with the beating method. A total of 3,876 spiders were collected, 2,379 in the orange trees and 1,497 in the herbaceous vegetation; 17 families and 99 species were registered; Oxyopes salticus Hentz, 1845 (Oxyopidae) was the most abundant spider in herbaceous vegetation and Sphecozone cristata Millidge, 1991 (Linyphiidae) the most abundant in the orange trees. Cursorial spiders were the most abundant guild at both herbaceous vegetation and orange trees. The araneofauna of herbaceous vegetation in the different handling orchards did not present significant differences in diversity (H'= 2.13 -"ecological"; 2.24 -"traditional"); the diversity was smaller in the orange trees (H'=1.95). Perhaps because of different sampling methods at different microhabitats, the Jaccard's Index indicates low similarity between assemblages (17.5%).

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