Laboratory Of Entomologia

Passo Fundo, Brazil

Laboratory Of Entomologia

Passo Fundo, Brazil
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Huerta H.,Laboratory Of Entomologia
Zootaxa | Year: 2010

Four new species of Scatopsidae from Mexico are described and illustrated based on adult morphology, two belonging to the genus Thripomorpha Enderlein and two to the genus Neorhegmoclemina Cook. These species are named Thripomorpha ungula, n. sp., Thripomorpha liliae, n. sp., Neorhegmoclemina dentata, n. sp. and N. raptoria, n. sp. The latter two represent the first record of Neorhegmoclemina Cook in Mexico. All of these species were collected with Malaise traps in the States of Hidalgo and Guerrero. © 2010 Magnolia Press.


Depieri R.A.,Federal University of Paraná | Panizzi A.R.,Laboratory Of Bioecologia Of Percevejos | Panizzi A.R.,Laboratory Of Entomologia
Neotropical Entomology | Year: 2011

Laboratory studies were conducted to compare duration of feeding and superficial and in-depth damage to soybean (Glycine max) seeds by the Southern green stink bug, Nezara viridula (L.), the Neotropical brown stink bug, Euschistus heros (F.), the red-banded stink bug, Piezodorus guildinii (Westwood), and the green-belly stink bug, Dichelops melacanthus (Dallas). Results indicated that feeding time was significantly longer for N. viridula (≈ 133 min) compared to E. heros and D. melacanthus (≈ 70 min), but not different from P. guildinii (≈ 103 min). There was a positive correlation between feeding time and the resulting damage for E. heros, N. viridula and P. guildinii (R2>0.80, P<0.0001), but not for D. melacanthus (R2 = 0.1011, P = 0.1493). The deepest seed damage (2.0 mm) was made by P. guildinii and the shallowest (0.5 mm) by D. melacanthus. The depth of the seed damage by E. heros and N. viridula (0.8, 1.2 mm, respectively) was intermediate in comparison to the other species studied. Feeding damage to the seed endosperm caused variable cell disruption and protein body dissolution, particularly when P. guildinii fed on seeds, suggesting that the deleterious action of salivary enzymes was greater for this bug compared to the others. © 2011 Sociedade Entomológica do Brasil.


Navia D.,Laboratory Of Quarentena Vegetal | Marsaro A.L.,Laboratory Of Entomologia | da Silva F.R.,University of Amsterdam | Gondim M.G.C.,University of Pernambuco | de Moraes G.J.,University of Sao Paulo
Neotropical Entomology | Year: 2011

The presence of the red palm mite, Raoiella indica Hirst, is reported for the first time in Brazil. This invasive mite was found in July 2009 infesting coconut palms and bananas in urban areas of Boa Vista, State of Roraima, in northern Brazil. Comments on the possible pathways of R. indica into the country, present and potential impact of its introduction and mitigating measures to prevent or to delay the mite spread in Brazil are presented. © 2011 Sociedade Entomológica do Brasil.


Bortoli L.C.,University of Caxias do Sul | Bertin A.,University of Sao Paulo | Efrom C.F.S.,Laboratory Of Entomologia | Botton M.,Laboratory Of Entomologia
Revista Brasileira de Fruticultura | Year: 2012

The biology of Spodoptera eridania was studied in the laboratory (22±1°C, RH 70±10%, 14 hours of photoperiod) in leaves of strawberry (Fragaria x ananassa cv. 'Aromas') and grape (Vitis vinifera cv. 'Cabernet Sauvignon'). The duration and viability of the entire cycle were respectively 52.2±1.32 days and 37.6% for strawberry and 42.2±0.45 days and 25.5% for grapes. The sex ratio in strawberry was 0.58 and 0.48 on grape. The average longevity of males and females in strawberry was 16.3±1.16 and 15.8±1.85 days, respectively, and 5.6±0.88 and 7.3±0.83 days in grape. The mean fecundity was 1,747.5±187.32 eggs per female in strawberry and 1,764.9±289.04 on grape. The life table of fertility showed that the net reproduction rate and finite rate of increase were 394.89 and 1.10, respectively, for strawberry and 213.98 and 1.12 for grapevine. Strawberry cv. 'Aromas' and grape cv. 'Cabernet Sauvignon' are suitable hosts providing similar population growth rates of S. eridania.


PubMed | Laboratory Of Entomologia and University Of Passo Fundo
Type: Journal Article | Journal: Neotropical entomology | Year: 2016

Among the aphids associated with wheat and other winter cereals, Rhopalosiphum padi (L.) is currently the predominant species in the wheat growing region of southern Brazil. The damage caused by this aphid occurs by direct feeding and/or by the transmission of pathogenic viruses, such as the Barley/Cereal yellow dwarf virus. In order to estimate the direct damage caused by R. padi on wheat, we evaluated the population growth of this aphid during the tillering and elongation stages and its effects on grain yield components. The experiment was conducted in a screenhouse with three wheat cultivars (BRS Guabiju, BRS Timbava, and Embrapa 16). The effect of a period of 16days, starting from an infestation of 40 aviruliferous aphids/plant, was evaluated and compared to non-infested plants. In both stages, the population growth of R. padi was lower on the BRS Timbava. Although infestation caused a reduction in the grain yield of the three cultivars, this effect was lower for BRS Timbava. The cultivar Embrapa 16 supported higher infestations and was more tolerant to damage than the BRS Guabiju.


PubMed | Laboratory Of Entomologia and Embrapa Uva e Vinho. Rua Livramento
Type: Journal Article | Journal: Neotropical entomology | Year: 2016

Drosophila suzukii (Matsumura) has been recently detected causing damage to strawberries in Brazil. Infestation in strawberry culture has often been observed jointly with the presence of Zaprionus indianus Gupta. This study investigated the susceptibility of strawberries at three ripening stages to infestation of D. suzukii and Z. indianus and their interaction. In the laboratory, strawberries cv. Albion at different ripening stages (green, semi-ripe and ripe) were exposed to D. suzukii and Z. indianus for 24 h in choice and no-choice bioassays. Additionally, we evaluated the effects of mechanical damage incurred artificially or by D. suzukii oviposition on Z. indianus infestation. In no-choice bioassay, there were no significant differences in fruit susceptibility to D. suzukii infestation at different ripening stages. However, in choice bioassay, D. suzukii adults preferred to oviposit on R fruit. The presence of mechanical damage did not increase susceptibility of fruit to D. suzukii oviposition. For Z. indianus, there was greater susceptibility of R fruit in relation to SR and G fruit in both the choice and no-choice bioassays. There was a significant and positive interaction of mechanical damage and damage caused by D. suzukii to R fruit and infestation by Z. indianus, which was not observed in SR and G fruit. Although infestation of Z. indianus is related to attack damaged or decaying fruit, this work shows that this species has the ability to oviposit and develop in healthy strawberry fruit with and increased infestation level when the fruit has damage to its epidermis.


Navia D.,Laboratory Of Quarentena Vegetal | Marsaro Jr. A.L.,Laboratory Of Entomologia
Neotropical Entomology | Year: 2010

The citrus Hindu mite, Schizotetranychus hindustanicus (Hirst), is reported for the first time in Brazil and for the second time in South America. Mite specimens were collected from citrus in the municipality of Boa Vista, State of Roraima, northern Brazil. Symptoms associated with S. hindustanicus infestations on citrus are described. The importance of avoiding dissemination of this mite to the main citrus production areas in Brazil is discussed.


Aballay F.H.,Laboratory Of Entomologia | Murua A.F.,National University of San Juan | Acosta J.C.,National University of San Juan | Centeno N.D.,National University of Costa Rica
Neotropical Entomology | Year: 2012

The succession of carrion fauna and the decomposition stages were studied in the arid environment of San Juan Province, Argentina (31°32′34. 7″ S; 68°34′39. 4″ W). Two pig carcasses (Sus scrofa) were placed in wire mesh cages, 100 m apart from each other. Each carcass was surrounded by pitfall traps, and a modified Malaise trap was placed above. Daily samplings were carried out to collect the insects present in the carcasses and the traps, and body and environmental temperature were measured. The main colonizer species was Chrysomya albiceps (Wiedemann) and its larvae were dominant over other Diptera. The first adult blowflies emerged at 8. 9 days. The time to reach the remains stage was 8 days shorter than for other South American sites. We recorded the early arrival of adult Dermestes maculates De Geer and Dermestes ater De Geer 2 days after the beginning of the assay, and larvae of these species were recorded 4 days after. We determined a 1. 5-day error in the postmortem interval estimation using the temperatures measured in the assay and those recorded by the nearest meteorological station. © 2012 Sociedade Entomológica do Brasil.


Silva F.A.C.,Laboratory Of Bioecologia Of Percevejos | da Silva J.J.,Laboratory Of Bioecologia Of Percevejos | Depieri R.A.,Laboratory Of Bioecologia Of Percevejos | Panizzi A.R.,Laboratory Of Entomologia
Neotropical Entomology | Year: 2012

Greenhouse and laboratory studies were conducted to evaluate feeding activity and superficial damage to soybean seed by the brown-winged stink bug, Edessa meditabunda (F.), and the Neotropical brown stink bug, Euschistus heros (F.). Soybean plants (cv. BRS 282), at R6 stage of development were used. Thirty pairs of each species were used individually for 48 h. Two daily observations (9:00 AM and 3:00 PM) were taken to record the number of bugs (feeding/resting) on plant parts. Harvested seeds imbibed in tetrazolium solution were photographed for measurement of the damaged surface. Adult E. meditabunda significantly preferred soybean stems (19.7 bugs) to pods (2.7). Feeding/resting was similar at 9:00 AM (mean number of 28.0 bugs) and 3:00 PM (24.3). Euschistus heros equally fed/stayed on stems (7.3 bugs) and pods (6.9), although most bugs (12.3) remained on the cage net; feeding/resting on all plant structures amounted to 13.7 bugs at 9:00 AM and 17.7 bugs at 3:00 PM. Amylase activity was greater for E. heros (41.61 ± 0.89 U/mg) and almost none for E. meditabunda (2.35 ± 0.14 U/mg). The superficial damage to seeds was significantly greater for E. meditabunda (22.9 mm2) compared to E. heros (12.5 mm2). However, E. meditabunda caused less shrinkage of the seed tegument, while E. heros damage was deeper and seeds showed reduction in size. © 2012 Sociedade Entomológica do Brasil.


PubMed | Laboratory Of Entomologia and São Paulo State University
Type: Journal Article | Journal: Neotropical entomology | Year: 2016

We evaluated the effects of constant low-temperature storage on Diaeretiella rapae (McIntosh) (Braconidae, Aphidiinae). Diaeretiella rapae mummies were stored at 51C for 0-36days. The percentage of D. rapae emergence varied (100-83%) after 0-32days of storage. After 32days, emergence reduced to 55%. According to our Probit analysis, 50% mortality (LT50) of the population of D. rapae was reached after 40days of storage at 5C. Storage for up to 32days did not negatively affect emergence and survival. Cold exposure of D. rapae for 36days did not influence morphological malformations, sex ratio, and emergence of the F1 generation. After 4-36days of storage, D. rapae showed a gradual decrease in emergence, longevity, reproductive capacity, and F1 sex ratio. Diaeretiella rapae can be stored for up to 24days at 5C, at which time the percentage of parasitism and the F1 sex ratio remain above 38% and at 0.50, respectively.

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