RESUMO
Nine identified species of Asopinae belonging to seven genera were previously reported from French Guiana. Twelve more species are reported here for the first time. Thus, a total of 21 species in nine genera of Asopinae are now known and reported from French Guiana, which represents about 20 % of all the Asopinae species recorded in South America, and though French Guiana only accounting for half a percent of its surface area. Examined species are photographed; localities, some new hosts and ecological aspects are mentioned. The genera Tylospilus and Tyrannocoris are recorded here for the first time in French Guiana and Tyrannocoris jole for the first time in South America.
Assuntos
Heterópteros , Animais , Ecologia , Guiana Francesa , América do SulRESUMO
The physiological condition and immune responses of organisms living at different elevations are expected to display local adaptations to the different climatic and biotic conditions. Small ectotherms with specialized diets are highly susceptible to environmental change, as their life cycle is largely affected by temperature and by the presence of specific resources. This study focuses on two species of rolled-leaf beetles (Chrysomelidae), both present at two different elevations in Costa Rica: Cephaloleia belti Baly, a diet-generalist, and Chelobasis bicolor Gray, a diet-specialist. Body size, energetic condition (lipid storage), muscle mass and immune condition (melanization response) were compared in beetle populations from a tropical rainforest (50 m elevation) and a tropical montane forest (2 000 m elevation). These measurements reflect current and past nutritional condition and hence are good estimators of individual fitness. We analyzed a total of 172 individuals from both species, sexes and elevations. We predicted that beetles at higher elevation would display larger body size, higher energetic condition and lower immune response associated with metabolic requirements and parasitic pressure in colder temperatures. In general, beetles at high altitude were larger, had more lipids and muscle and showed stronger melanization (i.e., immune response) than beetles at low altitudes. Such differences among populations at different elevations may reflect local adaptation to altitude or phenotypic plasticity. However, the effect of elevation was not equivalent amongst species or sex. Measuring physiological traits in organisms with broad elevational distributions could be useful in understanding possible species responses to climate change.
La condición fisiológica y la respuesta inmune de poblaciones que habitan a distintas altitudes pueden mostrar adaptación local a las condiciones abióticas y bióticas locales. Entre los organismos más susceptibles al cambio ambiental están los ectotermos pequeños con dietas especializadas, debido a que su ciclo de vida es, en gran medida, afectado tanto por la temperatura como por la presencia de recursos específicos. Este estudio se enfoca en dos especies de escarabajos (Chrysomelidae) presentes a lo largo de un gradiente altitudinal en Costa Rica: Cephaloleia belti Baly, una especie de dieta generalista, y Chelobasis bicolor Gray, de dieta especialista. Se comparó el tamaño corporal, la condición energética (almacenamiento de lípidos), la masa muscular y la condición inmunológica (respuesta de melanización) entre poblaciones de escarabajos de un bosque tropical (a 50 m de altitud) y un bosque tropical montano (a 2 000 m de altitud). Las variables seleccionadas reflejan las condiciones nutricionales actuales y pasadas y son buenos estimadores de la adecuación individual. Se analizaron un total de 172 escarabajos de ambas especies, sexos y elevaciones. Predecimos que los escarabajos a mayor elevación tendrán mayor tamaño corporal, mayor condición energética y menor respuesta inmune asociadas con los requerimientos metabólicos y la presión de los parásitos asociados con ambientes fríos. En general, los escarabajos a mayor altitud fueron más grandes, tuvieron más lípidos y masa muscular, y presentaron una mayor respuesta inmune de melanización que los escarabajos a menor altitud. Es posible que las diferencias entre las poblaciones a diferentes altitudes reflejen adaptaciones locales a las condiciones ambientales a distintas altitudes o plasticidad fenotípica. Sin embargo, el efecto de la altitud no fue de la misma magnitud entre las dos especies ni entre los dos sexos. La medición de caracteres fisiológicos en organismos ectotérmicos de amplia distribución altitudinal puede ser útil para entender las respuestas de ciertas especies al cambio climático.
RESUMO
This study aimed to assess the glyphosate application effects on the Cerotoma arcuata Oliver (Coleoptera: Chrysomelidae) population in glyphosate-resistant soybean crops. Field studies were conducted with glyphosate and the insecticide endosulfan to observe the effects of these pesticides on C. arcuata, on its damages in the crop and on the populations of natural enemies in glyphosate-resistant soybean crops. Moreover, the lethal and behavioral sublethal response of C. arcuata to glyphosate and endosulfan was conducted in the laboratory. The results of the field and laboratory experiments showed that glyphosate caused moderate toxicity and high irritability in C. arcuata and that endosulfan caused high toxicity and irritability. Therefore, the direct effect of glyphosate on C. arcuata was negative and does not explain the population increases of this pest in glyphosate-resistant soybean. However, the glyphosate also decreased the density of predators. Thus, the negative effect of glyphosate on the predators may be related to population increases of C. arcuata in glyphosate-resistant soybean crops, however, more studies are needed to better evidence this relationship. This study suggests that glyphosate can impact other non-target organisms, such as herbivorous insects and natural enemies and that the use of this herbicide will need to be carefully stewarded to prevent potential disturbances in beneficial insect communities in agricultural systems.
Assuntos
Besouros/efeitos dos fármacos , Glicina/análogos & derivados , Herbicidas/farmacologia , Animais , Brasil , Produtos Agrícolas , Endossulfano/farmacologia , Glicina/farmacologia , Resistência a Herbicidas , Inseticidas/farmacologia , Dinâmica Populacional , Glycine max , GlifosatoRESUMO
Abstract Stiretrus decastigmus (Herrich-Schaeffer) (Hemiptera: Pentatomidae) is an important predator of the insect pest Microtheca ochroloma Stal (Coleoptera: Chrysomelidae). The present study investigated the pre-imaginal development of S. decastigmus at different temperatures. The temperatures were: 20, 25, and 30 °C, with a relative humidity of 70 ± 10% and a photofase of 12 h, and the nymphs were fed larvae of M. ochroloma. We evaluated the duration and viability of the egg and nymphal stages, the duration of each instar, and the predation potential. The incubation time decreased with increasing temperature, and the viability was highest at 25 °C. The duration of the nymphal stage was inversely proportional to the temperature, ranging from 18 days at 30 °C to 40.6 days at 20 °C. The highest S. decastigmus predation rates were found at 20 °C (90.4 larvae) and 30 °C (72.5 larvae). S. decastigmus showed the highest viability and lowest consumption of larvae of M. ochroloma at 25 °C.(AU)
Resumo Stiretrus decastigmus (Herrich-Schaeffer) (Hemiptera: Pentatomidae) é um importante predador do inseto-praga Microtheca ochroloma Stal (Coleoptera: Chrysomelidae). O objetivo deste trabalho foi estudar o desenvolvimento pré-imaginal de S. decastigmus em diferentes temperaturas. Foram utilizadas as temperaturas de 20, 25, e 30 °C, umidade relativa do ar de 70 ± 10% e fotofase de 12 h, sendo as ninfas alimentadas com larvas de M. ochroloma. Foram avaliados a duração e viabilidade dos estágios de ovo e ninfa, a duração de cada instar e o potencial de predação. O período de incubação diminuiu com o aumento da temperatura e apresentou maior viabilidade a 25 °C. A duração do estágio ninfal foi inversamente proporcional a temperatura com 18 dias a 30 °C e 40,6 dias a 20 °C. A maior taxa de predação de S. decastigmus foi encontrada a 20 °C (90,4 larvas) e 30 °C (72,5 larvas). S. decastigmus teve maior viabilidade e menor consumo de larvas de M. ochroloma a 25 °C.(AU)
Assuntos
Hemípteros , Temperatura , Controle Biológico de VetoresRESUMO
Abstract Stiretrus decastigmus (Herrich-Schaeffer) (Hemiptera: Pentatomidae) is an important predator of the insect pest Microtheca ochroloma Stal (Coleoptera: Chrysomelidae). The present study investigated the pre-imaginal development of S. decastigmus at different temperatures. The temperatures were: 20, 25, and 30 °C, with a relative humidity of 70 ± 10% and a photofase of 12 h, and the nymphs were fed larvae of M. ochroloma. We evaluated the duration and viability of the egg and nymphal stages, the duration of each instar, and the predation potential. The incubation time decreased with increasing temperature, and the viability was highest at 25 °C. The duration of the nymphal stage was inversely proportional to the temperature, ranging from 18 days at 30 °C to 40.6 days at 20 °C. The highest S. decastigmus predation rates were found at 20 °C (90.4 larvae) and 30 °C (72.5 larvae). S. decastigmus showed the highest viability and lowest consumption of larvae of M. ochroloma at 25 °C.
Resumo Stiretrus decastigmus (Herrich-Schaeffer) (Hemiptera: Pentatomidae) é um importante predador do inseto-praga Microtheca ochroloma Stal (Coleoptera: Chrysomelidae). O objetivo deste trabalho foi estudar o desenvolvimento pré-imaginal de S. decastigmus em diferentes temperaturas. Foram utilizadas as temperaturas de 20, 25, e 30 °C, umidade relativa do ar de 70 ± 10% e fotofase de 12 h, sendo as ninfas alimentadas com larvas de M. ochroloma. Foram avaliados a duração e viabilidade dos estágios de ovo e ninfa, a duração de cada instar e o potencial de predação. O período de incubação diminuiu com o aumento da temperatura e apresentou maior viabilidade a 25 °C. A duração do estágio ninfal foi inversamente proporcional a temperatura com 18 dias a 30 °C e 40,6 dias a 20 °C. A maior taxa de predação de S. decastigmus foi encontrada a 20 °C (90,4 larvas) e 30 °C (72,5 larvas). S. decastigmus teve maior viabilidade e menor consumo de larvas de M. ochroloma a 25 °C.
Assuntos
Animais , Comportamento Predatório/fisiologia , Temperatura , Besouros/fisiologia , Controle Biológico de Vetores/métodos , Heterópteros/crescimento & desenvolvimento , Fatores de Tempo , Brasil , Ecossistema , Fenômenos Ecológicos e Ambientais , Larva/crescimento & desenvolvimentoRESUMO
Abstract Stiretrus decastigmus (Herrich-Schaeffer) (Hemiptera: Pentatomidae) is an important predator of the insect pest Microtheca ochroloma Stal (Coleoptera: Chrysomelidae). The present study investigated the pre-imaginal development of S. decastigmus at different temperatures. The temperatures were: 20, 25, and 30 °C, with a relative humidity of 70 ± 10% and a photofase of 12 h, and the nymphs were fed larvae of M. ochroloma. We evaluated the duration and viability of the egg and nymphal stages, the duration of each instar, and the predation potential. The incubation time decreased with increasing temperature, and the viability was highest at 25 °C. The duration of the nymphal stage was inversely proportional to the temperature, ranging from 18 days at 30 °C to 40.6 days at 20 °C. The highest S. decastigmus predation rates were found at 20 °C (90.4 larvae) and 30 °C (72.5 larvae). S. decastigmus showed the highest viability and lowest consumption of larvae of M. ochroloma at 25 °C.
Resumo Stiretrus decastigmus (Herrich-Schaeffer) (Hemiptera: Pentatomidae) é um importante predador do inseto-praga Microtheca ochroloma Stal (Coleoptera: Chrysomelidae). O objetivo deste trabalho foi estudar o desenvolvimento pré-imaginal de S. decastigmus em diferentes temperaturas. Foram utilizadas as temperaturas de 20, 25, e 30 °C, umidade relativa do ar de 70 ± 10% e fotofase de 12 h, sendo as ninfas alimentadas com larvas de M. ochroloma. Foram avaliados a duração e viabilidade dos estágios de ovo e ninfa, a duração de cada instar e o potencial de predação. O período de incubação diminuiu com o aumento da temperatura e apresentou maior viabilidade a 25 °C. A duração do estágio ninfal foi inversamente proporcional a temperatura com 18 dias a 30 °C e 40,6 dias a 20 °C. A maior taxa de predação de S. decastigmus foi encontrada a 20 °C (90,4 larvas) e 30 °C (72,5 larvas). S. decastigmus teve maior viabilidade e menor consumo de larvas de M. ochroloma a 25 °C.
RESUMO
A new tortoise beetle species, Cyrtonota abrili, is described from the Antioquia and Caldas departments in Colombia. New faunistic data are provided for 87 species, including 16 new additions to the country's fauna. A checklist of the known 238 species of tortoise beetles recorded from Colombia is given.
RESUMO
The Chrysomelidae (Coleoptera) is a highly speciose family that has been poorly studied at the regional level in Mexico. In the present study, we estimated species richness and diversity in oak-pine forest, Tamaulipan thorny scrub and in tropical deciduous forests in Peregrina Canyon within the Altas Cumbres Protected Area of the northeastern state of Tamaulipas, Mexico. Sampling of Chrysomelidae consisted of five sweep net samples (200 net sweeps) within each of three sites during four sample periods: early dry season, late dry season, early wet season, and late wet season. Species were identified and total numbers per species were recorded for each sample. A total of 2,226 specimens were collected belonging to six subfamilies, 81 genera and 157 species of Chrysomelidae from the study area. Galerucinae was the most abundant subfamily with 1,828 specimens, representing 82.1% of total abundance in the study area. Lower abundance was recorded in Cassidinae (8.5%), Eumolpinae (3.6%), Cryptocephalinae (2.2%), Chrysomelinae (2.2%), and finally Criocerinae (1.3%). The highest species richness was also presented in the subfamily Galerucinae with 49% of the total obtained species followed by Cassidinae (20%), Cryptocephalinae (9.7%), Eumolpinae (9.7%), Chrysomelinae (6.5%) and Criocerinae (5.2%). The most common species were Centralaphthona fulvipennis Jacoby (412 individuals), Centralaphthona diversa (Baly) (248), Margaridisa sp.1 (219), Acallepitrix sp.1 (134), Longitarsus sp.1 (104), Heterispa vinula (Erichson) (91), Epitrix sp.1 (84) and Chaetocnema sp.1 (72). Twenty-two species were doubletons (1.97% of total abundance) and 52 were singletons (2.33%). The estimated overall density value obtained was 0.0037 individuals/m2. The greatest abundance and density of individuals were recorded at the lowest elevation site. However, alpha diversity increased with increasing altitude. Similarity values were less than 50% among the three sites indicating that each site had distinct species assemblages of Chrysomelidae. The highest abundance was obtained during the late dry season, whereas diversity indices were highest during the early wet season. The present work represents the first report of the altitudinal variation in richness, abundance, and diversity of Chrysomelidae in Mexico. These results highlight the importance of conservation of this heterogeneous habitat and establish baseline data for Chrysomelidae richness and diversity for the region.
RESUMO
An updated list of the types of 57 species of Fulcidacini (Chrysomelidae, Cryptocephalinae) deposited in the collection of the Museu de Zoologia da Universidade de São Paulo (MZSP) is provided. The data on labels attached to 31 primary and 495 secondary type-specimens are presented. Some notes on the Werner Bokermanns biography, who designated 70% of the Fulcidacini types housed in the MZSP collection, are included.(AU)
Assuntos
Animais , Lista de Checagem/instrumentação , Besouros/classificação , Museus , ZoologiaRESUMO
An updated list of the types of 57 species of Fulcidacini (Chrysomelidae, Cryptocephalinae) deposited in the collection of the Museu de Zoologia da Universidade de São Paulo (MZSP) is provided. The data on labels attached to 31 primary and 495 secondary type-specimens are presented. Some notes on the Werner Bokermanns biography, who designated 70% of the Fulcidacini types housed in the MZSP collection, are included.
Assuntos
Animais , Besouros/classificação , Lista de Checagem/instrumentação , Museus , ZoologiaRESUMO
This is a preliminary study of the diversity of the Flea Beetles (Alticinae) of the Mexican state of Oaxaca based on fieldwork by the author in 1991, 1997, and 2010, the literature, and specimens in several institutional collections. The number of genera and species for Mexico as well as for Oaxaca increased significantly from previous studies. There are now 625 species in 90 genera recorded from Mexico with 275 species in 68 genera recorded from Oaxaca. There are 113 species known only from the state of Oaxaca and another 38 species known only from Oaxaca and the surrounding states. Oaxaca has a relatively high diversity as well as a high percentage of endemism. This study also demonstrates the effects of how even a small amount of fieldwork together with extracting specimen data from institutional collections can significantly increase the total faunistic and diversity knowledge of an area. A complete list of the genera and species known from Oaxaca is included.
ResumenEste es un estudio preliminar de la diversidad de los Escarabajos Pulga (Alticinae) del estado mexicano de Oaxaca basado en el trabajo de campo por el autor en 1991, 1997, y 2010, la revisión de la literatura y el estudio de varios especímenes en colecciones institucionales. El número de géneros y especies para México y para Oaxaca aumentó significativamente a partir de estudios anteriores. En la actualidad hay 625 especies en 90 géneros registrados para México con 275 especies en 68 géneros registrados de Oaxaca. Hay 113 especies conocidas sólo del estado de Oaxaca, y otras 38 especies conocidas sólo de Oaxaca y los estados circundantes. Oaxaca tiene una diversidad relativamente alta, así como un alto porcentaje de endemismo. Este estudio también demuestra como una pequeña cantidad de trabajo de campo junto con la extracción de datos de especímenes de colecciones institucionales pueden aumentar significativamente el conocimiento sobre la fauna total y la diversidad biológica de una región. Se incluye una lista completa de los géneros y especies conocidas de Oaxaca.
RESUMO
A total of 301 adult hispine beetles of the genera Cephaloleia and Chelobasis were found in rolled leaves of plants of 17 species of Zingiberales (families Costaceae, Heliconiaceae, Maranthaceae, Musaceae, and Zingiberaceae) during a field study at La Gamba, Golfito region, Costa Rica. Of these beetles, Cephaloleia belti was recorded from 12 potential host plant species, C. distincta from 7, C. dilaticollis from 5, C., Chelobasis bicolor, C. championi, and C. histrionica from 3, Chelobasis perplexa and C. instabilis from 2, whereas C. trivittata from only one. Of the plant species, Heliconia latispatha had 7 beetle species in its leaf rolls, Calathea lutea had 5, H. imbricata and H. rostrata had 4, H. stricta and Musa paradisiaca had 3, H. wagneriana had 2, while on H. vaginalis, H. danielsiana, H. densiflora, H. longiflora, Calathea crotalifera, C. platystachya, Goeppertia lasiophylla, Alpinia purpurata, Costus pulverulentus and Costus barbatus, H. densiflora, H. vaginalis, and H. danielsana only hispines of one species were found. Cephaloleia belti occurred together with beetles of six other hispine species, whereas Cephaloleia trivittata never shared a leaf roll with another hispine species. The remaining beetle species aggregated with one to four other hispines. Adults of C. belti and C. championi were frequently seen, occasionally also with C. dilaticollis, C. histrionica, and Chelobasis perplexa, to co-occur with the carabid Calophaena ligata in the same leaf roll without any sign of interspecific aggression. A comparison of host choices and the phylogeny of the hispines and of their host plants revealed no signs that beetles used species level phylogenetic relationships within the Zingiberales to select food plants. Obviously, within this plant order, rolled-leaf hispines choose their plant hosts in a nearly opportunistic manner. Seemingly, they use differences among plants at higher taxonomic levels but within the Zingiberales, the availability of young - rolled - leaves might be the actual decisive factor.
RESUMO
A summary of literature, documented observations and field studies finds evidence that mothers actively defend offspring in at least eight species and three genera of Neotropical Chrysomelinae associated with two host plant families. Reports on three Doryphora species reveal that all are oviparous and feed on vines in the Apocyanaceae. Mothers in the two subsocial species defend eggs and larvae by straddling, blocking access at the petiole and greeting potential predators with leaf-shaking and jerky advances. A less aggressive form of maternal care is found in two Platyphora and four Proseicela species associated with Solanaceae, shrubs and small trees. For these and other morphologically similar taxa associated with Solanaceae, genetic distances support morphology-based taxonomy at the species level, reveal one new species, but raise questions regarding boundaries separating genera. We urge continued study of these magnificent insects, their enemies and their defenses, both behavioral and chemical, especially in forests along the eastern versant of the Central and South American cordillera.
RESUMO
Four species of Chilean leaf beetles in the subfamily Chrysomelinae have been cytogenetically analyzed, Blaptea elguetai Petitpierre, 2011, Henicotherus porteri Bréthes, 1929 and Jolivetia obscura (Philippi, 1864) show 2n = 28 chromosomes and a 13 + Xyp male meioformula, and Pataya nitida (Philippi, 1864) has the highest number of 2n = 38 chromosomes. The karyotype of Henicotherus porteri is made of mostly small meta/submetacentric chromosomes, and that of Jolivetia obscura displays striking procentric blocks of heterochromatin at pachytene autosomic bivalents using conventional staining. These findings are discussed in relation to previous cytogenetic data and current taxonomy of the subfamily.
RESUMO
Species richness and abundance of seven Plagiometriona species on their host plants were studied along a single trail in the mountainous Serra dos Órgãos National Park in the State of Rio de Janeiro, Brazil. Six sites were chosen along an altitudinal gradient ranging from 1300 m to 2050 m, where all Solanaceae host plants were inspected in search of adults every two months from June 2006 to June 2007. Species richness did not vary clearly with altitude, but abundance increased up to 1800 m, where the highest mean host plant density was found, and abruptly decreased at the last elevational site. Most species showed a restricted distribution and just one occurred across the entire gradient. For at least four species, altitudinal distribution seems to be strongly related to host plant availability, while for the others it is difficult to access which factors are decisive, due to their low numbers. Only in October all species were found in the field, although February was the month with the highest total abundance. Over the course of the study, the greatest abundances were recorded from October to February, comprehending the hottest and rainiest months, and the lowest abundances were found from June to August, which include the coldest and driest months. Thus, species seasonal distribution, supported by other studies in the same area, seems to be related to the local climate.
RESUMO
Survey work from 1992-2001 identified 139 species of hispines at the lowland part of La Selva Biological Station, Costa Rica. The tribe Cephaloleiini was the most speciose with 58 species (41.7%) followed by the Chalepini with 55 (39.5%). The fauna is most closely related to that in South America but with some genera which are more speciose in the Nearctic Region. Plant associations are known for 88 (63.3%) of the species but many of these are merely collecting records, not host plant associations. The first plant associations are reported for Alurnus ornatus, Alurnus salvini, and Acentroptera nevermanni.
RESUMO
Em razão da importância de Microtheca ochroloma (Coleoptera: Chrysomelidae) como inseto-praga de Brassicaceae e da carência de informações relativas aos inimigos naturais desse crisomelídeo, o presente trabalho visa a relatar, pela primeira vez, a ocorrência de Stiretrus decastigmus (Hemiptera: Pentatomidae) predando M. ochroloma em cultivo de Brassica chinensis L., em Santa Maria, Rio Grande do Sul, Brasil (latitude: 29°43'28"S, longitude: 53°43'19"O e altitude: 95m). Também são descritas a metodologia de coleta e as características morfológicas dos espécimes encontrados.
Due to the importance of Microtheca ochroloma (Coleoptera: Chrysomelidae) as an insect-pest of Brassicaceae and to the lack of data regarding its natural enemies, the present research aims to report the first occurrence of Stiretrus decastigmus (Hemiptera: Pentatomidae) preying M. ochroloma in Brassica chinensis L., at Santa Maria, Rio Grande do Sul state, Brazil (latitude: 29°43'28"S, longitude: 53°43'19"O, height: 95m). The collecting methodology and morphologic characteristics of the insects found were also described.
RESUMO
Due to the importance of Microtheca ochroloma (Coleoptera: Chrysomelidae) as an insect-pest of Brassicaceae and to the lack of data regarding its natural enemies, the present research aims to report the first occurrence of Stiretrus decastigmus (Hemiptera: Pentatomidae) preying M. ochroloma in Brassica chinensis L., at Santa Maria, Rio Grande do Sul state, Brazil (latitude: 29°43'28"S, longitude: 53°43'19"O, height: 95m). The collecting methodology and morphologic characteristics of the insects found were also described.
Em razão da importância de Microtheca ochroloma (Coleoptera: Chrysomelidae) como inseto-praga de Brassicaceae e da carência de informações relativas aos inimigos naturais desse crisomelídeo, o presente trabalho visa a relatar, pela primeira vez, a ocorrência de Stiretrus decastigmus (Hemiptera: Pentatomidae) predando M. ochroloma em cultivo de Brassica chinensis L., em Santa Maria, Rio Grande do Sul, Brasil (latitude: 29°43'28"S, longitude: 53°43'19"O e altitude: 95m). Também são descritas a metodologia de coleta e as características morfológicas dos espécimes encontrados.
RESUMO
Due to the importance of Microtheca ochroloma (Coleoptera: Chrysomelidae) as an insect-pest of Brassicaceae and to the lack of data regarding its natural enemies, the present research aims to report the first occurrence of Stiretrus decastigmus (Hemiptera: Pentatomidae) preying M. ochroloma in Brassica chinensis L., at Santa Maria, Rio Grande do Sul state, Brazil (latitude: 29°43'28"S, longitude: 53°43'19"O, height: 95m). The collecting methodology and morphologic characteristics of the insects found were also described.
Em razão da importância de Microtheca ochroloma (Coleoptera: Chrysomelidae) como inseto-praga de Brassicaceae e da carência de informações relativas aos inimigos naturais desse crisomelídeo, o presente trabalho visa a relatar, pela primeira vez, a ocorrência de Stiretrus decastigmus (Hemiptera: Pentatomidae) predando M. ochroloma em cultivo de Brassica chinensis L., em Santa Maria, Rio Grande do Sul, Brasil (latitude: 29°43'28"S, longitude: 53°43'19"O e altitude: 95m). Também são descritas a metodologia de coleta e as características morfológicas dos espécimes encontrados.
RESUMO
Due to the importance of Microtheca ochroloma (Coleoptera: Chrysomelidae) as an insect-pest of Brassicaceae and to the lack of data regarding its natural enemies, the present research aims to report the first occurrence of Stiretrus decastigmus (Hemiptera: Pentatomidae) preying M. ochroloma in Brassica chinensis L., at Santa Maria, Rio Grande do Sul state, Brazil (latitude: 29°43'28"S, longitude: 53°43'19"O, height: 95m). The collecting methodology and morphologic characteristics of the insects found were also described.
Em razão da importância de Microtheca ochroloma (Coleoptera: Chrysomelidae) como inseto-praga de Brassicaceae e da carência de informações relativas aos inimigos naturais desse crisomelídeo, o presente trabalho visa a relatar, pela primeira vez, a ocorrência de Stiretrus decastigmus (Hemiptera: Pentatomidae) predando M. ochroloma em cultivo de Brassica chinensis L., em Santa Maria, Rio Grande do Sul, Brasil (latitude: 29°43'28"S, longitude: 53°43'19"O e altitude: 95m). Também são descritas a metodologia de coleta e as características morfológicas dos espécimes encontrados.