scholarly journals Compared nymphal development of Tingis americana (Hemiptera, Tingidae) in two Handroanthus species (Bignoniaceae) and reproductive parameters in seedlings of Handroanthus heptaphyllus

2013 ◽  
Vol 103 (2) ◽  
pp. 195-199 ◽  
Author(s):  
Daiane C. Moreira ◽  
Luiza R. Redaelli ◽  
Marcus Guidoti ◽  
Aline Barcellos
Keyword(s):  
Host Plants ◽  
First Record ◽  
Reproductive Parameters ◽  
Egg Viability ◽  
Rio Grande Do Sul ◽  
Botanic Garden ◽  
Porto Alegre ◽  
Nymphal Development ◽  
Males And Females ◽  
The Mean

Nymphs and adults of Tingis americana Drake, 1922 were found feeding on leaves of Handroanthus heptaphyllus (Vell.) Mattos and Handroanthus chrysotrichus (Mart. ex A. DC.) Mattos in the Botanic Garden, Porto Alegre, state of Rio Grande do Sul, Brazil. This is the first record of T. americana on these host plants and in the southern Brazil. We aimed to compare the nymphal development on both hosts and to analyze the reproductive parameters on H. heptaphyllus (25 ± 1ºC; 60 ± 10% RH; 16 h photophase). The mean nymphal period (days) was shorter in individuals reared on H. heptaphyllus (12.69 ± 0.076) than on H. chrysotrichus (19.11 ± 0.208) (P < 0.0001), however, nymph viability was similar. On H. heptaphyllus, the mean embryonic period lasted 12.32 ± 0.274 days and the egg viability was 92%. The mean total and daily fecundity were 310.0 ± 19.40 eggs/female and 7.46 ± 0.302 eggs/female/day, respectively. Paired males and females showed similar longevity (P = 0.0691), while unpaired females lived longer than unpaired males (P = 0.0460).

scholarly journals Biology of Corecoris dentiventris Berg, 1884 (Hemiptera, Coreidae) in tobacco culture (Nicotiana tabacum)

2000 ◽  
Vol 60 (1) ◽  
pp. 173-178 ◽  
Author(s):  
B.-H. C. CALDAS ◽  
L. R. REDAELLI ◽  
L. M. G. DIEFENBACH
Keyword(s):  
Life Cycle ◽  
Host Plants ◽  
Southern Brazil ◽  
Egg Viability ◽  
Rio Grande Do Sul ◽  
Porto Alegre ◽  
Abaxial Side ◽  
First Instar ◽  
Main Vein ◽  
Concise Description

Corecoris dentiventris Berg, 1884 (HEM., Coreidae) represents a pest in the tobacco culture in Southern Brazil. Nymphs and adults cause the wilting and twisting of the tobacco leaves due to their sucking habit. There are very few works about this species and these are restricted to concise description of the adult morphology, records of host plants and enumeration of injuries. The present investigation aims to study the life cycle of this bug. The experiment was carried out in a tobacco culture (Virginia type, var. K 326) implanted in the experimental area of the Departamento de Fitossanidade of the Universidade Federal do Rio Grande do Sul, in Porto Alegre, RS. The life cycle was studied in field conditions, in nylon cages, from egg clusters oviposited by females of the colonizing generation. The prefered oviposition site was the main vein in the abaxial side of the leaf. The average incubation period was 13.7 ± 0.04 days and the egg viability, 99.63%. The average periods of the different instars of the bug, in days, were: 5.4 ± 0.08, 9.7 ± 0.19, 4.5 ± 0.08, 5.3 ± 0.08, 9.0 ± 0.13 respectively for the first, second, third, fourth and fifth instars. The first instar presented the highest mortality (13.86%). The accumulated mortality of the nymphal phase was 35.29%. The sex ratio was 0.97 males : 1 female.

scholarly journals Phytophagy of the predator Podisus nigrispinus (Dallas, 1851) (Hemiptera: Pentatomidae) fed on prey and Brassicaceae

2017 ◽  
Vol 77 (4) ◽  
pp. 703-709 ◽  
Author(s):  
J. F. J. Grigolli ◽  
M. M. Kubota Grigolli ◽  
D. G. Ramalho ◽  
A. L. Martins ◽  
A. M. Vacari ◽  
...  
Keyword(s):  
Generation Time ◽  
Reproductive Rate ◽  
Egg Mass ◽  
Reproductive Parameters ◽  
Net Reproductive Rate ◽  
Laboratory Rearing ◽  
Males And Females ◽  
The Mean ◽  
Heteroptera Pentatomidae ◽  
Alternative Diet

Abstract The purpose of this study was to investigate the development and reproduction of the zoophytophagous predator Podisus nigrispinus (Dallas) (Heteroptera: Pentatomidae) fed kale, broccoli and cabbage affects its. Nymphs and adults of this predator were fed on larvae of Plutella xylostella (L.) (Lepidoptera: Plutellidae) as prey with kale, cabbage, or broccoli. In the nymph period, the duration and prey consumption were similar with all the Brassicacea cultivar. However, nymph viability was higher for predators with broccoli leaves. The mean weight of 5th-instar nymphs, newly emerged females and the sex ratio were similar among the Brassicacea cultivars, while newly emerged males were heavier with kale and broccoli leaves. The supply of broccoli leaves resulted in greater oviposition, higher number of eggs per egg mass and longer longevity of P. nigrispinus males and females. Furthermore, the consumption of P. xylostella larvae by adult predators was higher with these cultivars. The net reproductive rate (R0) and mean generation time (T) were highest for predators with prey and broccoli leaves. The reproductive parameters of P. nigrispinus were enhanced when fed on P. xylostella larvae with and broccoli leaves, which can be an alternative diet in laboratory rearing of this predator.

The influence of temperature on development, longevity, and fecundity in the Rutherglen bug, Nysius vinitor (Hemiptera : Lygaeidae)

1972 ◽  
Vol 20 (1) ◽  
pp. 67 ◽  
Author(s):  
M Kehat ◽  
M Wyndham
Keyword(s):  
Egg Laying ◽  
Population Increase ◽  
Threshold Temperature ◽  
Nymphal Development ◽  
Influence Of Temperature On ◽  
Males And Females ◽  
The Mean ◽  
The Difference ◽  
Fluctuating Temperatures ◽  
Significant Mortality

The mean duration of the egg stage of N. vinitor at constant temperatures ranged from 36.8 days at 15C to 3.8 days at 32C and that of the nymphs from 45 days at 20C to 12.0 days at 32C. Within the range 20-35C egg and nymphal mortalities were low; temperatures of 12 or 40C were lethal to both eggs and nymphs. Mean nymphal development times for males and females were similar. The threshold temperature for egg development was 14.5C and that for nymphs 15C; 70 and 225 day-degrees were required for completing egg and nymphal development respectively. The immature stages developed more rapidly at fluctuating temperatures out of doors than they did indoors at constant temperatures equal to the mean of the fluctuating temperatures. Within the range of screen temperatures 21.5-23.0C the difference between mean development in shade and in sun was 9-10 days. Age-specific fecundity and mortality schedules were determined for N. vinitor at constant temperatures. Temperature and longevity were inversely related and males survived longer than females. Thus at 22OC mean longevity of males was 115 days and of females 90 days, as compared with 31 and 18 days respectively at 30�C. After a maturation period that was longer at lower temperatures, daily egg-laying per female decreased with age from a maximum that occurred before there was significant mortality of females. The rates of the cumulative egg-laying increased with temperature from 22 to 35C. Mean total number of eggs per female was significantly higher at 25 and 30�C than at 22 or 35�C. However, life-table calculations revealed that a temperature of 35�C yielded the maximum rate of population increase. Within the range 22-35C, temperatures and rc values were linearly related. Unmated females laid significantly fewer eggs than those that had mated, but survived longer.

scholarly journals First occurrence of Spodoptera cosmioides (Walker, 1858) (Lepidoptera: Noctuidae) on eucalyptus seedlings after field transplantation in Rio Grande do Sul State, Brazil

2020 ◽  
Vol 2 ◽  
pp. ec02023
Author(s):  
Norton Borges Junior ◽  
Ervandil C. Costa ◽  
Dayanna N. Machado ◽  
Leandra Pedron ◽  
Jardel Boscardin ◽  
...  
Keyword(s):  
Host Plants ◽  
Rio Grande ◽  
First Record ◽  
Eucalyptus Urophylla ◽  
Rio Grande Do Sul ◽  
First Occurrence ◽  
Clonal Plantation ◽  
Lepidoptera Noctuidae

This study reports the first occurrence of Spodoptera cosmioides (Walker, 1858) (Lepidoptera: Noctuidae) larvae causing defoliation in transplanted seedlings in a clonal plantation of Eucalyptus urophylla S.T. Blake (Myrtaceae), in Butiá municipality, Rio Grande do Sul State (30°9’45” S; 51°59’42” W). The S. cosmioides caterpillars are polyphagous, including eucalyptus among their host plants. It was observed that the caterpillar infestation damaged 80% of the seedlings, while the defoliation varied from 13% to 24% per plant. This is the first record of S. cosmioides caterpillars causing injuries in a new plantation of E. urophylla.

scholarly journals First record of Cithaeron reimoseri (Araneae: Cithaeronidae) from the New World and first record of the family from southern Brazil

Check List ◽  
2013 ◽  
Vol 9 (6) ◽  
pp. 1594 ◽  
Author(s):  
Ricardo Ott ◽  
Antonio Domingos Brescovit
Keyword(s):  
New World ◽  
Rio Grande ◽  
First Record ◽  
Southern Brazil ◽  
Rio Grande Do Sul ◽  
Porto Alegre ◽  
Worldwide Distribution ◽  
The Family ◽  
First Time ◽  
Median Eyes

The African spider Cithaeron reimoseri Platnick, 1991 is registered for the first time in the New World, based in two females collected at Porto Alegre, Rio Grande do Sul, Brazil. Until now C. reimoseri was known only by the holotype from Eritrea. The species C. praedonius O. P.-Cambridge, 1872 was, until now, the only known species of the family with worldwide distribution and is considered prone to introduction in anthropic environments. Cithaeronidae are considered lower gnaphosoids being identifiable by the depressed posterior median eyes and the pseudosegmented tarsi.

scholarly journals Echinuria uncinata (Rudolphi) (Nematoda, Acuariidae) in Netta peposaca (Vieillot) (Aves, Anatidae) in South America

2006 ◽  
Vol 23 (2) ◽  
pp. 520-528 ◽  
Author(s):  
Eliane F. da Silveira ◽  
José F. R. Amato ◽  
Suzana B. Amato
Keyword(s):  
South America ◽  
Coastal Region ◽  
Rio Grande ◽  
The State ◽  
Bursa Of Fabricius ◽  
Rio Grande Do Sul ◽  
Wintering Grounds ◽  
Breeding Grounds ◽  
Males And Females ◽  
The Mean

This is the first report of a species of Echinuria Soloviev, 1912, on anatid hosts in South America, causing granulomas. It is also the first detailed description and record of a species of Echinuria, for South America in the Rosy-billed Pochard, Netta peposaca (Vieillot, 1816). Fifty-two rosy-billed pochards were examined for helminths in the Municipalities of Santa Vitória do Palmar (locality of Fazenda Sossego) and (locality of Ponta da Antena), State of Rio Grande do Sul, Brazil, and Alvear, Province of Corrientes, northern Argentina. Samples were obtained from 2003 to 2004. After the catch each bird was immediately frozen with dry ice. Prior to necropsy birds were sexed, weighted, measured, and the state of maturity (juvenile or adult) determined, based on the presence or absence of a bursa of Fabricius. The granulomas with the nematodes were found in the proximal esophagus at the junction with the proventriculus. Two birds had one (fistulated) and two granulomas, respectively. One of the birds was from the wintering grounds along the coastal region in the State of Rio Grande do Sul, southern Brazil. The other, from one of the breeding grounds in northern Argentina, was captured before the trip to the wintering grounds along the migratory flyway. Prevalence was 3.8% while the mean intensity of infection was 7.2. Morphometry of males and females and the comparison with previous descriptions and illustrations allowed the identification of the present specimens as E. uncinata.

Notes on slender species of the long-jawed spider genus Tetragnatha (Araneae, Tetragnathidae) with description of three new species

Zootaxa ◽  
2020 ◽  
Vol 4768 (1) ◽  
pp. 43-75
Author(s):  
PEDRO DE SOUZA CASTANHEIRA ◽  
RENNER LUIZ CERQUEIRA BAPTISTA
Keyword(s):  
New Species ◽  
Rio Grande ◽  
First Record ◽  
Neotropical Region ◽  
Sao Paulo ◽  
São Paulo ◽  
Rio Grande Do Sul ◽  
Nomina Dubia ◽  
Males And Females ◽  
Three New Species

New data about slender orb-weaving species of the cosmopolitan genus Tetragnatha are presented. Tetragnatha chauliodus (Thorell, 1890) and Tetragnatha tenuissima O. Pickard-Cambridge, 1889 are redescribed, including one synonymy for each species and the first record of the first species to the Neotropical region. Also, three new species are herein described, all based on males and females. Tetragnatha megalocera new species is recorded exclusively from Brazil (Espírito Santo, Rio de Janeiro, Rio Grande do Sul and São Paulo states), while Tetragnatha renatoi new species is recorded from Venezuela, Argentina (Misiones) and Brazil (Paraná, Pernambuco, Rio Grande do Sul, Rondônia, Santa Catarina and São Paulo states). Finally, Tetragnatha chiyokoae new species is described from Yunnan province (China) and Okinawa (Japan), with an additional record for Taiwan. Furthermore, Tetragnatha exilima (Mello-Leitão, 1943), Tetragnatha filigastra Mello-Leitão, 1943 and Tetragnatha lactescens (Mello-Leitão, 1947) are nomina dubia. 

scholarly journals Diploposthe laevis (Bloch) Jacobi (Eucestoda, Hymenolepididae) from Netta peposaca (Vieillot) (Aves: Anatidae): first record for the Neotropical Region and a new host

2008 ◽  
Vol 25 (1) ◽  
pp. 83-88
Author(s):  
Eliane F. da Silveira ◽  
Suzana B. Amato
Keyword(s):  
South America ◽  
Rio Grande ◽  
First Record ◽  
Neotropical Region ◽  
Rio Grande Do Sul ◽  
New Host ◽  
Histological Sections ◽  
Nesting Site ◽  
The Mean ◽  
Collection Sites

One hundred eight rosy-billed pochards, Netta peposaca (Vieillot, 1816), collected in Brazil and Argentina were examined for endoparasites. Collection sites included the municipalities of Santa Vitória do Palmar and Jaguarão, Rio Grande do Sul State, Brazil (wintering site) and Alvear, Corrientes Province, northern Argentina (nesting site). Birds were frozen in dry ice after collection. During necropsy they were categorized according to sex and maturation, either adult or juvenile. The cestode Diploposthe laevis (Bloch) Jacobi, 1896 was found (prevalence 68.5%, mean infection was 2). The mean prevalence of D. laevis in Alvear (25.9%) was higher than found in Jaguarão and Santa Vitória do Palmar, Rio Grande do Sul (19%), and could be related to the nesting site and to the period when the birds may ingest a higher amount of food. This is the first record of a species of the genus Diploposthe in anatideans from South America, and the first record of the species in N. peposaca. Details of the cirrus pouch and vagina were described based on histological sections.

scholarly journals Reproductive parameters of Lonomia obliqua Walker, 1855 (Lepidoptera: Saturniidae) in laboratory

2004 ◽  
Vol 47 (4) ◽  
pp. 575-577 ◽  
Author(s):  
Lisete Maria Lorini ◽  
Gisele Sana Rebelato ◽  
Juliano Bonatti
Keyword(s):  
Incubation Period ◽  
Larval Stage ◽  
Rio Grande ◽  
Reproductive Parameters ◽  
Egg Viability ◽  
Rio Grande Do Sul ◽  
Lonomia Obliqua

Lonomia obliqua is an insect that has urticant spines in the larval stage. This species may cause death as a result of haemorrhages caused by a toxin released from the caterpillar's spines onto the skin of the victim. Since 1989 when this species was identified in Rio Grande do Sul, Brazil, many accidents have happened. The aim of this study was to verify the oviposition, fecundity, fertility, viability of eggs and incubation period of the species. Adults were left in a moth's cage to mate and lay eggs. Thirteen couples were observed daily, and the number of eggs and the caterpillars emerged were recorded. The results showed a mean of 2.8 (± 1.3) ovipositions, a mean fecundity of 135.3 (± 54.4) eggs/female, a mean fertility of 111.9 (± 55.4) eggs/female, a mean egg viability of 80.9 (± 20.97) % and a mean incubation period of 31.8 (± 5.8) days.

Estudo da Dispersão do Monóxido de Carbono Associado a Emissão Veicular na Região Metropolitana de Porto Alegre com o Sistema de Modelagem Numérica CCATT - BRAMS

2020 ◽  
Author(s):  
Karen Leandra ávila da Silva ◽  
Marcelo Félix Alonso ◽  
Sabrina Feltes de Moura ◽  
Túlio Felipe Verdi Filho
Keyword(s):  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Porto Alegre

Resumo O monitoramento contínuo da qualidade do ar local é extremamente importante para a gestão ambiental de uma cidade, mas nem sempre viável pelo alto custo dos equipamentos. Por conta disso, investe-se muito na utilização da modelagem numérica no estudo da qualidade do ar, que é altamente dependente de inventários de emissões dos poluentes e seus precursores. Nesse contexto o objetivo deste trabalho foi realizar um estudo da dispersão do monóxido de carbono (CO) na Região Metropolitana de Porto Alegre, no estado do Rio Grande do Sul, utilizando o sistema de modelagem numérica CCATT-BRAMS, com ênfase nas fontes veiculares. Foram analisados dois períodos - janeiro de 2009 e janeiro de 2016 - utilizando-se as informações dos inventários de gases precursores elaborados pela FEPAM para os anos base de 2009 e 2013, respectivamente, distribuídos espacialmente com o auxílio do pré-processador de emissões PREP-CHEM-SRC utilizado pelo CCATT-BRAMS. No geral, as simulações representaram coerentemente os dados observados pela rede de monitoramento, com RMSE abaixo de 0,3 na maioria das estações avaliadas. Análises de sensibilidade também revelaram que, para o período avaliado, aproximadamente 40% da concentração de CO sobre a cidade de Porto Alegre foi devido ao transporte de larga escala, proveniente das cidades localizadas ao norte, dentro da Região Metropolitana.

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