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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Biodiversidade e análise faunística de Cerambycidae (Insecta: Coleoptera) em Reserva de Mata Atlântica, Viçosa, Minas Gerais / Biodiversity and faunistic analisys of Cerambycidae (Insecta: Coleoptera) in the Mata Atlântica Reserve, Viçosa, Minas Gerais

Enríquez Morillo, Sandra Inés 27 July 2007 (has links)
Made available in DSpace on 2015-03-26T13:30:54Z (GMT). No. of bitstreams: 1 texto completo.pdf: 3627199 bytes, checksum: d8337c999635de3231842d4c4acee5fb (MD5) Previous issue date: 2007-07-27 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The Mata do Paraiso , an Atlantic Forest reserve, is located at the coordinates 20°48 07 S e 42°51 31 W, in the municipal district of Viçosa, Minas Gerais, Brazil. The objectives of this work were to inventory Cerambycidae species, to elaborate illustrated keys for subfamilies, tribes and species and to determine the influence of the climatic factors on longhorned beetles seasonality of the Mata do Paraiso . In the sampling light trap, beating, entomological net, hand-picking and bait traps were used. To study diversity all species collected with all techniques were considered. To study the influence of the climatic factors only the sampled species with light trap since October of 1986 to March of 2007 were analyzed. A total of 440 long-horned beetles, represented by 140 species, 107 genera, 36 tribes and five subfamilies were collected. The values of species and tribes richness were high compared with other inventories. Twelve species were new records for Minas Gerais State. This information contributes to extend the distribution of these species and also determines a possible relation of them with the Mata Atlântica vegetation. Fourteen species were identified only to genera level and two to tribe level; these species are probably new for the science. Twenty nine keys were elaborated facilitating the identification of the individuals to species level. The temperature and the precipitation influenced positively the richness and abundance of long-horned beetles of the Mata do Paraiso . Cerambycidae diversity decreases in the dry season and increases in the rainy season. This work constitutes a basic guide to identify the longhorned beetles of the Mata do Paraiso and similar ecosystems. / A Mata do Paraíso, uma reserva de Mata Atlântica, está localizada no ponto de coordenadas 20°48 07 S e 42° 1 31 W, no município de Viçosa, Minas Gerais, Brasil. Os objetivos deste trabalho foram inventariar as espécies de Cerambycidae, elaborar chaves taxonômicas ilustradas para a identificação de subfamílias, tribos e espécies e determinar a influência dos fatores climáticos na sazonalidade dos cerambicídeos da Mata do Paraíso. Na amostragem foram usadas as técnicas da armadilha luminosa, guardachuva entomológico, rede entomológica, coleta manual e armadilhas com iscas. Para o estudo da diversidade foram consideradas as espécies coletadas com todas as técnicas. No estudo da influência dos fatores climáticos foram analisadas somente as espécies amostradas com armadilha luminosa desde outubro de 1986 a março de 2007. Foram coletados 440 cerambicídeos, representados por 140 espécies, 107 gêneros, 37 tribos e cinco subfamílias. Os valores de espécies e de tribos são altos comparados com outros inventários. Doze espécies são novos registros para o Estado de Minas Gerais. Esta informação contribui na ampliação da distribuição biogeográfica destas espécies e também na possível relação delas com o bioma de Mata Atlântica. Foram identificadas quatorze espécies até nível de gênero e duas só até nível de tribo; provavelmente estas espécies são novas para a ciência. Foram elaboradas 29 chaves taxonômicas possibilitando a identificação dos exemplares até nível de espécie. A temperatura média mensal e a precipitação média mensal influíram positivamente na riqueza e abundância de Cerambycidae da Mata do Paraíso. A riqueza e abundância de Cerambycidae decrescem na estação seca e aumentam na estação de chuva. Este trabalho constitui-se numa referência para a identificação dos Cerambycidae para a EPTEAMP e ecossistemas com características semelhantes.
12

Dinâmica de infestação em Acacia mearnsii e ecologia de Oncideres impluviata (Coleoptera: Cerambycidae) / Dynamics of infestation in Acacia mearnsii and ecology of Oncideres impluviata (Coleoptera: Cerambycidae)

Maria Angélica Ono 30 October 2015 (has links)
Neste estudo a dinâmica de quebra de galhos de acácia negra foi investigada com análise de séries temporais e modelagem ecológica, em conjunto de dados obtidos durante oito anos, visando compreender como se dá o comportamento de Oncideres impluviata (Colepotera, Cerambycidae) em diferentes áreas de plantios florestais, em fazendas localizadas em diferentes municípios do Rio Grande do Sul. A diversidade de cerambicídeos também foi analisada em duas fazendas localizadas no município de maior abundancia de O. impluviata. Os resultados sugerem que a maior abundância de galhos quebrados se dá em Cristal e Encruzilhada do Sul. O município de Piratini exibiu menor densidade de galhos quebrados, entretanto, a projeção dos valores médios de galhos seguiu um padrão aparentemente exponencial para Cristal e Encruzilhada do Sul e sigmóide para Piratini. As funções de autocorrelação e autocorrelação parcial não evidenciaram claras tendências de ciclos nas séries para os três municípios, mas as tendências de ocorrência de picos similares aos surtos diferiram nos três municípios quando a análise espectral foi aplicada. A dinâmica analisada pela equação de Ricker indicou a ocorrência de equilíbrio estável, ciclo limite e comportamento caótico nos três municípios, porém, com menor prevalência de caos em Piratini. A migração espacial mostrou maior poder de estabilização populacional em Cristal e Encruzilhada do Sul em razão das maiores taxas de crescimento presentes nestes municípios. Quinze espécies de cerambicídeos foram encontradas em duas fazendas pertencentes ao município de Encruzilhada do Sul e Oncideres impluviata, Nesozineus alphoides e Ygapema delicata foram as espécies de cerambicídeos mais abundante nas áreas analisadas. As curvas de rarefação atingiram assíntotas de forma satisfatória, comprovando a suficiência do esforço amostral. / In this study, the dynamics of black wattle broken branches was investigated with time series analysis and ecological modeling in dataset obtained during eight years, in order to understand how O. impluviata (Coleoptera, Cerambycidae) behaves in different forests placed in farms of different municipalities of the Rio Grande do Sul, Brazil. The diversity of cerambycids wal also analysed in two farms placed in the municipality with the highest abundance of O. impluviata. The results suggest that higher abundance of broken branches occurs in Cristal and Encruzilhada do Sul. Piratini exhibited the lowest density of broken branches, however, the projection of mean values of branches followed an apparently exponential pattern in Cristal and Encruzilhada do Sul and sigmoid in Piratini. The autocorrelation and partial autocorrelation functions did not show clear trends of cycles in the series of the three municipalities, but the peak occurrence trends similar to the outbreaks differed in the three municipalities when the spectral analysis was applied. The dynamics analysed with the Ricker equation indicated stable equilibrium, limit cycle and chaos in the three municipalities, but, with lower prevalence in Piratini. The spatial migration showed higher power to stabilize population in Cristal and Encruzilhada do Sul in response to high growth rates in these municipalities. Fifteen species of cerambycids were found in the two farms in Encruzilhada do Sul and O. impluviata, Nesozineus alphoides and Ygapema delicate were the most abundant species in the areas. The rarefaction curves showed satisfactory asymptotes, confirming the adequacy of the sampling effort.
13

Análise faunística de insetos nas margens do alto rio Madeira, Porto Velho, Rondônia, Brasil. / Faunistic analysis of insects occurring in the margins of Madeira River, in Porto Velho, State of Rondônia, Brazil

Maria Aurea Pinheiro de Almeida Silveira 30 April 2010 (has links)
A fauna de insetos com ênfase em Coleoptera, Cerambycidae nas margens do rio madeira, em Rondônia foi estudada. Coletas foram realizadas de janeiro a dezembro de 2004, durante um dia por mês em quatro áreas, perfazendo 15 pontos de amostragem. Foram utilizadas armadilhas luminosas modelo Luiz de Queiroz e armadilhas de Malaise. Na avaliação das comunidades, foi utilizada a riqueza de espécies, a abundância, os índices de diversidade e similaridade. Para a estimativa de riqueza de espécies foram usados procedimentos estatísticos não paramétricos Chao 1, Jackknife 1 e Jackknife 2. Foram coletados 7036 indivíduos de 684 espécies distribuídos em 127 famílias. Coleoptera e Lepidoptera foram as ordens mais representativas. Foi registrado um total de 3.779 espécimes distribuídos em 33 famílias de Coleoptera. As famílias mais abundantes foram Scarabaeidae, Hydrophilidae, Chrysomelidae, Carabidae, Cerambycidae e Curculionidae que juntas representam 81 % dos indivíduos coletados. Para Cerambycidae foram coletados 110 espécies distribuídas em 5 subfamílias, 35 tribos e 92 gêneros, com a maioria das espécies (75%) representada por um único indivíduo. Os valores do índice de Shannon-Weaver obtido para as áreas foram significativamente diferentes, e as espécies estão distribuídas homogeneamente. / This research deals with the fauna of insects, emphasizeing Coleoptera, Cerambycidae, occurring in the margins of the Madeira River, in Porto Velho, State of Rondônia, Brazil. The insects were collected one day per month, with light traps (model Luiz de Queiroz) and Malaise traps placed at 15 sampling points, from January to December, 2004. The parameters species richness, species abundance, diversity and similarity indices were used to evaluate the insect communities. The species richness was estimated by the non parametric statistical procedures Chao 1, Jackknife 1 and Jackknife 2. One collected 7,036 specimens belonging to 684 species and/or morphospecies, distributed in 127 families. The orders Coleoptera and Lepidoptera were the most diverse ones. The most abundant families of Coleoptera were Carabidae, Cerambycidae, Chrysomelidae, Curculionidae, Hydrophilidae and Scarabaeidae, which together represented 81% of the individuals collected. Regarding the Cerambycidae one collected 110 species, distributed in 5 subfamilies, 35 tribes, and 92 genera. Most of the species (75%) was represented by only one individual. The values of the Shannon index obtained for the areas were significantly different and the species were homogeneously distributed.
14

Revisão do gênero Scleronotus White, 1855 (Coleoptera, Cerambycidae, Lamiinae, Aconthoderini) / Revision of the genus Scleronotuswhite, 1855 (Coleoptera, Cerambycidae, Lamiinae, Acanthoderini)

Julio, Carlos Eduardo de Alvarenga 26 June 1998 (has links)
Submitted by Alberto Vieira (martins_vieira@ibest.com.br) on 2018-05-24T20:34:01Z No. of bitstreams: 1 273334.pdf: 10217667 bytes, checksum: 4477c1afe5326f4eecf04d7258f45299 (MD5) / Made available in DSpace on 2018-05-24T20:34:01Z (GMT). No. of bitstreams: 1 273334.pdf: 10217667 bytes, checksum: 4477c1afe5326f4eecf04d7258f45299 (MD5) Previous issue date: 1998-06-26 / CAPES / O gênero Scleronotus White, 1855 é revisado. São tratadas as espécies S. egensis White, 1855; S. scabrosus Thomson, 1860; S. stupidus Lacordaire, 1872; S. angulatus Aurivillius, 1916; S. anthribiformis Aurivillius, 1916; S. flavosparsus Melzer, 1935; S. monticellus Julio, 1998; S. tricarinatus Julio, 1998; S. hirsutus Julio, 1998 e S. strigosus Julio, 1998. O estudo da esclerificação distal do phallus é utilizado para auxiliar na identificação em nível específico. Chave para a identificação das espécies é fornecida. As dez espécies conhecidas e as terminálias masculinas são ilustradas. Mapas da distribuição geográfica das espécies são incluídos. / The genus Scleronotus White, 1855 is revised. S. egensis White, 1855; S. scabrosus Thomson, 1860; S. stupidus Lacordaire, 1872; S. angulatus Aurivillius, 1916; S. anthribiformis Aurivillius, 1916; S. flavosparsus Melzer, 1935; S. monticellus Julio, 1998; S. tricarinatus Julio, 1998; S. hirsutus Julio, 1998 and S. strigosus Julio, 1998 are studied. The study of the distal sclerification of the phallus is used to help in the identification at specific level. A key for identification of the species is provided. The ten known species and their male terminalia are illustrated. Maps of the geographical distribution of the species are included.
15

Demography and dispersal ability of the Alpine Longhorn \kur{Rosalia alpina} (Coleoptera: Cerambycidae) / Demography and dispersal ability of the Alpine Longhorn \kur{Rosalia alpina} (Coleoptera: Cerambycidae)

DRAG, Lukáš January 2011 (has links)
This Master Thesis brings results of study on endangered species Alpine Longhorn Rosalia alpina in beech forest of National Nature Reserve Maly and Velky Bezdez and Slatinne Hills. We used mark-recapture method to study the population size, longevity and dispersal ability of this species. We also assessed the distribution pattern of the species on another 15 habitat patches in the Ralska Upland.
16

Life history studies of the old house borer, Hylotrupes bajulus (L.) (Coleoptera: Cerambycidae)

Cannon, Kevin Francis 13 February 2009 (has links)
A North American biotype of the old house borer, Hylotrupes bajulus (L.) was established from field and laboratory data. This biotype is based on differences in size and longevity of the life stages and on adult fecundity. N. A. females were observed to oviposit a mean of 165.1 ± 15.5 eggs in comparison to 119.4 (South African) and 105.2 (European). Oviposition period was 5.2 ± 0.5 days for the N. A. biotype and 3.9 and 12 days for the South African and European, respectively. Eggs of the N. A. biotype were smaller than those of the South African and incubation period (8.5 ± 0.3) shorter than both South African (14.0) and European (9-12). Development and comparisons of the pupal and larval stages are presented and discussed. Comparisons of the N. A. and European biotypes under similar temperature, humidity and nutritional conditions found no significant differences between biotypes. These results indicate that the biotypes have undergone little genetic change since their separation over 200 years ago. The old house borer is quite responsive to environmental conditions and the biological variation noted in field populations is attributed to non-genetic modifications of the phenotype. The high degree of biological flexibility noted in this species allows the OHB to inhabit marginal habitats and explains its present world-wide distribution. The OHB was successfully reared from egg to adult in 9-11 months on an artificial diet. An oligidic diet was developed and was composed of ground host tissue (southern yellow pine, Pinus spp.), purified cellulose, agar, and basic nutrients. This diet provided an adequate physical and nutritional environment as noted in the reduction in larval mortality and developmental period when compared to conventional rearing methods. Comparative nutritional, physiological and behavioral studies are now possible between larvae feeding on artificial diets and conventional wooden blocks. Observations of the adult mating behavior, fecundity, oviposition period and egg viability were reported under two mating regimes: single and multiple. Fecundity and egg viability were not significantly different between regimes. However, the number of egg batches, length of oviposition period and the longevity of adult females were significantly different. Adult behavior between regimes was not noticeably different. Males actively compete for females when other males are present and aggressive interactions are common. The practical and evolutionary significance of single and multiple matings is discussed. Consumption, growth, utilization and respiration by three weight classes of old house borer larvae, under 5 constant temperatures and relative humidity were studied. Wood consumption in all larval weight classes was greatest in the temperature range of 20° to 30°C and significantly reduced below and above these temperatures. Growth rates for small larvae were not significantly different among temperatures. Medium and large larvae recorded negative growth rates at 15° and 35°C. Wood utilization was greatest at temperatures of 20° and 25°C. Respiration rates were highest for small larvae. Small larvae were apparently more efficient at converting wood ingested to biomass at all temperatures. / Ph. D.
17

Diversidade de himenópteros parasitoides (Hymenoptera: Chalcididae) e coleobrocas (Coleoptera: Cerambycidae) associados à cultura de Tectona grandis Linn. f. (Lamiaceae) / Diversity of parasitoids (Hymenoptera: Chalcididae) and wood borers (Coleoptera: Cerambycidae) in teak Tectona grandis linn. f. (Lamiaceae)

Moura, Rogério Goularte 24 August 2012 (has links)
Com o objetivo de analisar a fauna de himenópteros parasitoides (Hymenoptera:Chalcididae) e de coleobrocas (Coleoptera: Cerambycidae) associados à cultura de T. grandis, foram utilizadas 5 armadilhas de Malaise instaladas no interior da floresta plantada. As coletas foram realizadas, semanalmente, de outubro de 2009 a setembro de 2010, em área de reflorestamento situado no município de Cáceres, MT. Foram analisados os índices faunísticos de frequência, constância, abundância e dominância e também diversidade de espécies. Foram coletados 414 parasitoides; pertencentes às famílias Chalcididae e distribuídos em 3 gêneros e 16 espécies e 715 espécies de coleobrocas, pertencentes à família Cerambycidae e distribuídos em 2 subfamílias, 18 tribos, 33 gêneros e 36 espécies. As espécies de parasitoides mais abundantes foram Brachymeria pandora e Ceyxia ventrispinosa. As espécies mais abundantes de coleobrocas foram Neoclytus pusillus, Achryson surinamum, Chlorida festiva, Coleoxestia atrata, Cosmoplatidius abare, Hexoplon uncinatum e Megacyllene acuta. / This research deals with the association of parasitoids (Hymenoptera: Chalcididae) with wood borers (Coleoptera: Cerambycidae) in a commercial forest of Tectona grandis located in Cáceres, State of Mato Grosso, Brazil. The insects were collected by using five Malaise traps in different sites of the forest, from October 2009 to September 2010. The following indexes were analyzed: frequency, constancy, abundance, dominance and species diversity. A total of 414 Chalcididae parasitoids and 715 Cerambycidae wood borers were collected. The most abundant parasitoid species were Brachymeria pandora and Ceyxia ventrispinosa while the most wood borers ones were Neoclytus pusillus, Achryson surinamum, Chlorida festiva, Coleoxestia atrata, Cosmoplatidius abare, Hexoplon uncinatum and Megacyllene acuta.
18

Diversidade de himenópteros parasitoides (Hymenoptera: Chalcididae) e coleobrocas (Coleoptera: Cerambycidae) associados à cultura de Tectona grandis Linn. f. (Lamiaceae) / Diversity of parasitoids (Hymenoptera: Chalcididae) and wood borers (Coleoptera: Cerambycidae) in teak Tectona grandis linn. f. (Lamiaceae)

Rogério Goularte Moura 24 August 2012 (has links)
Com o objetivo de analisar a fauna de himenópteros parasitoides (Hymenoptera:Chalcididae) e de coleobrocas (Coleoptera: Cerambycidae) associados à cultura de T. grandis, foram utilizadas 5 armadilhas de Malaise instaladas no interior da floresta plantada. As coletas foram realizadas, semanalmente, de outubro de 2009 a setembro de 2010, em área de reflorestamento situado no município de Cáceres, MT. Foram analisados os índices faunísticos de frequência, constância, abundância e dominância e também diversidade de espécies. Foram coletados 414 parasitoides; pertencentes às famílias Chalcididae e distribuídos em 3 gêneros e 16 espécies e 715 espécies de coleobrocas, pertencentes à família Cerambycidae e distribuídos em 2 subfamílias, 18 tribos, 33 gêneros e 36 espécies. As espécies de parasitoides mais abundantes foram Brachymeria pandora e Ceyxia ventrispinosa. As espécies mais abundantes de coleobrocas foram Neoclytus pusillus, Achryson surinamum, Chlorida festiva, Coleoxestia atrata, Cosmoplatidius abare, Hexoplon uncinatum e Megacyllene acuta. / This research deals with the association of parasitoids (Hymenoptera: Chalcididae) with wood borers (Coleoptera: Cerambycidae) in a commercial forest of Tectona grandis located in Cáceres, State of Mato Grosso, Brazil. The insects were collected by using five Malaise traps in different sites of the forest, from October 2009 to September 2010. The following indexes were analyzed: frequency, constancy, abundance, dominance and species diversity. A total of 414 Chalcididae parasitoids and 715 Cerambycidae wood borers were collected. The most abundant parasitoid species were Brachymeria pandora and Ceyxia ventrispinosa while the most wood borers ones were Neoclytus pusillus, Achryson surinamum, Chlorida festiva, Coleoxestia atrata, Cosmoplatidius abare, Hexoplon uncinatum and Megacyllene acuta.
19

Additions to the genus Rhaphuma Pascoe, 1858 (Coleoptera: Cerambycidae: Cerambycinae: Clytini) from Vietnam

Cao, Thi Quynh Nga, Pham, Thi Nhi, Hoang, Vu Tru, Pham, Van Phu, Le, My Hanh 16 January 2019 (has links)
The paper presents a checklist of the genus Rhaphuma Pascoe, 1858 belonging to the tribe Clytini from Vietnam. Of the total 26 species, there were eight species newly recorded for the Vietnam’s fauna, viz. Rhaphuma anongi Gressitt et Rondon, 1970; Rhaphuma clarina Gressitt et Rondon, 1970; Rhaphuma constricta Gressitt et Rondon, 1970; Rhaphuma diana Gahan, 1906; Rhaphuma eleodina Gressitt et Rondon, 1970; Rhaphuma elongata Gressitt et Rondon, 1970; Rhaphuma minima Gressitt et Rondon, 1970 and Rhaphuma phiale Gahan, 1906. All species are presented with notes on distribution. / Bài báo thống kê danh sách 26 loài thuộc giống Rhaphuma Pascoe, 1858, trong số đó có 8 loài là ghi nhận mới cho khu hệ Xén tóc của Vietnam, đó là: Rhaphuma anongi Gressitt et Rondon, 1970; Rhaphuma clarina Gressitt et Rondon, 1970; Rhaphuma constricta Gressitt et Rondon, 1970; Rhaphuma diana Gahan, 1906; Rhaphuma eleodina Gressitt et Rondon, 1970; Rhaphuma elongata Gressitt et Rondon, 1970; Rhaphuma minima Gressitt et Rondon, 1970; Rhaphuma phiale Gahan, 1906. Ngoài ra, bài báo còn cung cấp thông tin về phân bố của mỗi loàiở trong nước cũng như trên thế giới.
20

An Ecological Study of the Effect of the Long-horned Beetle Species (Coleoptera: Cerambycidae) on the Acacia Species in the Gum Arabic Belt of the Kordofan Region, Sudan

Ahmed Eisa, Maymoona 19 December 2011 (has links) (PDF)
Acacia species producing gum Arabic are of great (socio)-economic, and ecological importance in Sudan. Insect attacks are one of the main causal agents in the decline in the gum Arabic yielding trees. Infested trees are almost totally damaged if the infestation is left untreated. The beetle family Cerambycidae is one of the largest groups of insects. Commonly referred to as long-horned beetles, these pests destroy host trees, having a great affect during times of drought. Many studies have been completed about the effect of long-horned beetles in various global settings. However, in Sudan, there is limited information about the insects’ ecological, biological, and even basic, profile. Thus, in this dissertation I study the spectrum, relative abundance, and phenology of the long-horned beetle species that are infesting Acacia species in Kordofan region (Sudan). Seven species were recorded using interception traps. These included Anthracocentrus arabicus (Thomson, 1877), Crossotus strigifrons (Fairmaire, 1886), Crossotus subocellatus subocellatus (Fairmaire, 1886), Doesus telephoroides Pascoe, 1862, Gasponia gaurani Fairmaire, 1892, Titoceres jaspideus (Serville, 1835) and Tithoes sp.. Two species were recorded using ground - photoeclectors: Crossotus albicollis (Guérin, 1844) and Coelodon servum White, 1853. Most of the species are known from other Arabian and African countries. However Coelodon servum White, 1853, Doesus telephoroides Pascoe, 1862, and Gasponia gaurani Fairmaire, 1892 were recorded in this study for the first time in Sudan. Results from flight interception traps indicated peak activity density of long-horned beetles during the rainy season (June – September), with maximum occurrence in June and peak occurrence in August. All study sites showed infestations of long-horned beetles, but the level of infestation varied between sites and Acacia species. The El Demokeya reserve forest indicated the highest percentage of infestation out of all the sites surveyed in this study. The infestation ranged between 57.1% and 100.0% for Acacia senegal, between 5.9% and 26.7% for Acacia mellifera, and 0% to 23.1% for Acacia seyal study sites. Acacia species differed also with respect to the spatial infestation pattern. Results indicated the maximum (95.5%) presence of holes of infestation in the branches of A. senegal when compared to the trunk. Holes of infestation were recorded in all directions, with a minimal occurrence on the south side (18.2%). Opposite results were obtained for A. mellifera with the maximum number of holes in the trunks (46.2%), while branches were less affected. In addition results obtained showed no presence of holes in the branches of A. seyal. Moreover, this study focuses on the assessment of tree characteristics that may trigger the infestation. Logistic regression indicated that tree age was the only predictor for the infestation with long-horned beetles – at least for Acacia senegal. A significance difference was obtained for the stand height curve between non-infested and infested trees of Acacia species, except A. senegal stands at El Demokeya. The study was supplemented by qualitative data, produced from a survey of gum landowners. This questionnaire indicated the level of awareness that gum landowners had with regard to long-horned beetles and their infestations. The results of this survey denoted that 95.0% of gum farmers were aware of the long-horned beetles, while 49.2% indicated an awareness about infestations, mentioning the emergence holes as damage characteristics.

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