Trypanosomatid prevalence in Nezara viridula (L.), Euschistus heros (Fabricius) and Piezodorus guildinii (Westwood) (Heteroptera: Pentatomidae) populations in Northern Paraná, Brazil.
The stink bug complex in soybeans has a great potential to cause damage, their control has been difficult due to high population densities at the end of the season. Studies related to entomopathogenic organisms in stink bugs are interesting for their possibilities to be used as biological control agents and because they could be an etiological agent in mass rearing. We determined the prevalence of trypanosomatids in the most important species of the stink bugs complex in soybean, from Brazil, Nezara viridula (L.) Euschistus heros (Fabricius) and Piezodorus guildinii (Westwood). Insects were collected in soybean and on alternate hosts during the intercrop season. Hemolymph drops fromeach adult were mounted on slides and observed under microscope: stink bug numbers with and without flagellates were recorded. The flagellates found in P. guildinii or E. heros populations were smaller than that found in N. viridula. The higher prevalence of the trypanosomatids was observed on soybean reaching a peak of 30% of the sampled N. viridula specimens in January, 2001, and 44% prevalence in February, 2003. The maximum prevalences (16%) in P. guildinii were observed in January and February, 2003 and on July 27, 2003 with 20% of the specimens infected. Flagellates in the hemolymph of E. heros were less frequent (maximum prevalence of 8.7%), suggesting that this species is less susceptible than N. viridula and P. guildinii. Trypanosomatid prevalence was higher than that observed for entomopathogenic fungi, however they seem to be inefficient control agents in short term condition.
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2011-04-10T11:11:11Z
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Subjects: | Inseto, Percevejo, Praga de Planta, Soja., |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/451530 |
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dig-alice-doc-4515302017-08-15T23:23:55Z Trypanosomatid prevalence in Nezara viridula (L.), Euschistus heros (Fabricius) and Piezodorus guildinii (Westwood) (Heteroptera: Pentatomidae) populations in Northern Paraná, Brazil. SOSA-GÓMEZ, D. R. BORGES, E. VIEIRA, I. H. T. L. COSTA, F. OLIVEIRA, C. N. Inseto Percevejo Praga de Planta Soja. The stink bug complex in soybeans has a great potential to cause damage, their control has been difficult due to high population densities at the end of the season. Studies related to entomopathogenic organisms in stink bugs are interesting for their possibilities to be used as biological control agents and because they could be an etiological agent in mass rearing. We determined the prevalence of trypanosomatids in the most important species of the stink bugs complex in soybean, from Brazil, Nezara viridula (L.) Euschistus heros (Fabricius) and Piezodorus guildinii (Westwood). Insects were collected in soybean and on alternate hosts during the intercrop season. Hemolymph drops fromeach adult were mounted on slides and observed under microscope: stink bug numbers with and without flagellates were recorded. The flagellates found in P. guildinii or E. heros populations were smaller than that found in N. viridula. The higher prevalence of the trypanosomatids was observed on soybean reaching a peak of 30% of the sampled N. viridula specimens in January, 2001, and 44% prevalence in February, 2003. The maximum prevalences (16%) in P. guildinii were observed in January and February, 2003 and on July 27, 2003 with 20% of the specimens infected. Flagellates in the hemolymph of E. heros were less frequent (maximum prevalence of 8.7%), suggesting that this species is less susceptible than N. viridula and P. guildinii. Trypanosomatid prevalence was higher than that observed for entomopathogenic fungi, however they seem to be inefficient control agents in short term condition. 2011-04-10T11:11:11Z 2011-04-10T11:11:11Z 2011-04-10T11:11:11Z 2005-05-10 2005 2013-03-12T11:11:11Z Separatas Neotropical Entomology, Piracicaba, v. 34, n. 2, p. 341-347, Mar./Apr. 2005. http://www.alice.cnptia.embrapa.br/alice/handle/doc/451530 en eng openAccess |
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Inseto Percevejo Praga de Planta Soja. Inseto Percevejo Praga de Planta Soja. |
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Inseto Percevejo Praga de Planta Soja. Inseto Percevejo Praga de Planta Soja. SOSA-GÓMEZ, D. R. BORGES, E. VIEIRA, I. H. T. L. COSTA, F. OLIVEIRA, C. N. Trypanosomatid prevalence in Nezara viridula (L.), Euschistus heros (Fabricius) and Piezodorus guildinii (Westwood) (Heteroptera: Pentatomidae) populations in Northern Paraná, Brazil. |
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The stink bug complex in soybeans has a great potential to cause damage, their control has been difficult due to high population densities at the end of the season. Studies related to entomopathogenic organisms in stink bugs are interesting for their possibilities to be used as biological control agents and because they could be an etiological agent in mass rearing. We determined the prevalence of trypanosomatids in the most important species of the stink bugs complex in soybean, from Brazil, Nezara viridula (L.) Euschistus heros (Fabricius) and Piezodorus guildinii (Westwood). Insects were collected in soybean and on alternate hosts during the intercrop season. Hemolymph drops fromeach adult were mounted on slides and observed under microscope: stink bug numbers with and without flagellates were recorded. The flagellates found in P. guildinii or E. heros populations were smaller than that found in N. viridula. The higher prevalence of the trypanosomatids was observed on soybean reaching a peak of 30% of the sampled N. viridula specimens in January, 2001, and 44% prevalence in February, 2003. The maximum prevalences (16%) in P. guildinii were observed in January and February, 2003 and on July 27, 2003 with 20% of the specimens infected. Flagellates in the hemolymph of E. heros were less frequent (maximum prevalence of 8.7%), suggesting that this species is less susceptible than N. viridula and P. guildinii. Trypanosomatid prevalence was higher than that observed for entomopathogenic fungi, however they seem to be inefficient control agents in short term condition. |
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topic_facet |
Inseto Percevejo Praga de Planta Soja. |
author |
SOSA-GÓMEZ, D. R. BORGES, E. VIEIRA, I. H. T. L. COSTA, F. OLIVEIRA, C. N. |
author_facet |
SOSA-GÓMEZ, D. R. BORGES, E. VIEIRA, I. H. T. L. COSTA, F. OLIVEIRA, C. N. |
author_sort |
SOSA-GÓMEZ, D. R. |
title |
Trypanosomatid prevalence in Nezara viridula (L.), Euschistus heros (Fabricius) and Piezodorus guildinii (Westwood) (Heteroptera: Pentatomidae) populations in Northern Paraná, Brazil. |
title_short |
Trypanosomatid prevalence in Nezara viridula (L.), Euschistus heros (Fabricius) and Piezodorus guildinii (Westwood) (Heteroptera: Pentatomidae) populations in Northern Paraná, Brazil. |
title_full |
Trypanosomatid prevalence in Nezara viridula (L.), Euschistus heros (Fabricius) and Piezodorus guildinii (Westwood) (Heteroptera: Pentatomidae) populations in Northern Paraná, Brazil. |
title_fullStr |
Trypanosomatid prevalence in Nezara viridula (L.), Euschistus heros (Fabricius) and Piezodorus guildinii (Westwood) (Heteroptera: Pentatomidae) populations in Northern Paraná, Brazil. |
title_full_unstemmed |
Trypanosomatid prevalence in Nezara viridula (L.), Euschistus heros (Fabricius) and Piezodorus guildinii (Westwood) (Heteroptera: Pentatomidae) populations in Northern Paraná, Brazil. |
title_sort |
trypanosomatid prevalence in nezara viridula (l.), euschistus heros (fabricius) and piezodorus guildinii (westwood) (heteroptera: pentatomidae) populations in northern paraná, brazil. |
publishDate |
2011-04-10T11:11:11Z |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/451530 |
work_keys_str_mv |
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