Survival of Haemonchus contortus larvae in forage species in the Eastern Amazon

Survival of Haemonchus contortus larvae in forage species in the Eastern Amazon

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The objective of this work was to evaluate the survival of third-stage larvae (L3) of Haemonchus contortus in forage species in the Eastern Amazon. Four paddocks composed of Megathyrsus maximus 'Massai', M. maximus 'Mombaça', Urochloa brizantha 'Marandu', and Urochloa humidicola were used and divided into 13 plots each. Sheep feces containing about 10,000 eggs of H. contortus were deposited in each plot. Grass, feces, and soil samples were collected on the seventh, fifteenth, and thirtieth day post-contamination (DPC), and, then, they were sequentially collected every 30 days until the three-hundredth and thirtieth DPC. The following data were determined for the grass species: microclimatic, such as temperature, relative humidity, soil moisture, and grass luminosity, as well as macroclimatic data for rainfall, temperature, relative humidity, and solar radiation. L3 were recovered on all grasses and soil samples, in all plots, from the seventh to the three-hundredth and thirtieth DPC. The microclimatic parameters show correlations between the L3 recovery on grass and in the soil, and the macroclimatic parameters, between the L3 recovery in feces and on grass. Urochloa humidicola and M. maximus 'Massai' favor the development and survival of L3 of H. contortus, while U. brizantha 'Marandu' and M. maximus 'Mombaça' show a lower bioavailability of these larvae. 

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Main Authors: Pires, Claudina Rita de Souza, Cavalcante, Gustavo Goés, Prado, Roberto Sanchez, Costa Júnior, Lívio Martins, Rivero, Gabriela Riet Correa
Format: Digital revista
Language:eng
Published: Pesquisa Agropecuaria Brasileira 2022
Online Access:https://seer.sct.embrapa.br/index.php/pab/article/view/27068
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spelling rev-pab-br-article-270682022-05-18T18:27:35Z Survival of Haemonchus contortus larvae in forage species in the Eastern Amazon Sobrevivência de larvas de Haemonchus contortus em espécies de forrageiras na Amazônia Oriental Pires, Claudina Rita de Souza Cavalcante, Gustavo Goés Prado, Roberto Sanchez Costa Júnior, Lívio Martins Rivero, Gabriela Riet Correa Brachiaria; Megathyrsus maximus; Panicum; Urochloa brizantha; Urochloa humidicola; haemonchosis The objective of this work was to evaluate the survival of third-stage larvae (L3) of Haemonchus contortus in forage species in the Eastern Amazon. Four paddocks composed of Megathyrsus maximus 'Massai', M. maximus 'Mombaça', Urochloa brizantha 'Marandu', and Urochloa humidicola were used and divided into 13 plots each. Sheep feces containing about 10,000 eggs of H. contortus were deposited in each plot. Grass, feces, and soil samples were collected on the seventh, fifteenth, and thirtieth day post-contamination (DPC), and, then, they were sequentially collected every 30 days until the three-hundredth and thirtieth DPC. The following data were determined for the grass species: microclimatic, such as temperature, relative humidity, soil moisture, and grass luminosity, as well as macroclimatic data for rainfall, temperature, relative humidity, and solar radiation. L3 were recovered on all grasses and soil samples, in all plots, from the seventh to the three-hundredth and thirtieth DPC. The microclimatic parameters show correlations between the L3 recovery on grass and in the soil, and the macroclimatic parameters, between the L3 recovery in feces and on grass. Urochloa humidicola and M. maximus 'Massai' favor the development and survival of L3 of H. contortus, while U. brizantha 'Marandu' and M. maximus 'Mombaça' show a lower bioavailability of these larvae.  O objetivo deste trabalho foi avaliar o desenvolvimento e a sobrevivência de larvas de terceiro estágio (L3) de Haemonchus contortus em forrageiras na Amazônia Oriental. Foram utilizados quatro canteiros compostos por Megathyrsus maximus 'Massai', M. maximus 'Mombaça', Urochloa brizantha 'Marandu' e Urochloa humidicola, os quais foram divididos em 13 parcelas cada um. Fezes de ovinos com cerca de 10.000 ovos de H. contortus foram depositadas em cada parcela. Amostras de capim, fezes e solo foram coletadas no no sétimo, no décimo quinto e no trigésimo dia pós-contaminação (DPC) e, sequencialmente, a cada 30 dias até o trecentésimo trigésimo DPC. Foram determinados os seguintes dados das gramíneas: microclimáticos, como temperatura, umidade relativa do ar, umidade do solo e luminosidade do capim, e macroclimáticos, como pluviosidade, temperatura, umidade relativa do ar e radiação solar. As larvas do terceiro estágio foram recuperadas em todas as amostras de gramíneas e solo, em todas as parcelas, do sétimo ao trecentésimo trigésimo DPC. Os parâmetros microclimáticos mostram correlações entre a recuperação de L3 na grama e no solo, e os parâmetros macroclimáticos, entre a recuperação de L3 nas fezes e na grama. Urochloa humidicola e M. maximus 'Massai' favorecem o desenvolvimento e a sobrevivência de L3 de H. contortus, enquanto U. brizantha 'Marandu' e M. maximus 'Mombaça' apresentam menor biodisponibilidade dessas larvas. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira 2022-05-18 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/27068 Pesquisa Agropecuaria Brasileira; V.56, Jan./Dec., 2021: Publicação contínua em volume anual; e02664 Pesquisa Agropecuária Brasileira; V.56, Jan./Dec., 2021: Publicação contínua em volume anual; e02664 1678-3921 0100-104x eng https://seer.sct.embrapa.br/index.php/pab/article/view/27068/14978 Direitos autorais 2022 Pesquisa Agropecuária Brasileira
institution EMBRAPA
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-pab-br
tag revista
region America del Sur
libraryname Sistema de bibliotecas de EMBRAPA
language eng
format Digital
author Pires, Claudina Rita de Souza
Cavalcante, Gustavo Goés
Prado, Roberto Sanchez
Costa Júnior, Lívio Martins
Rivero, Gabriela Riet Correa
spellingShingle Pires, Claudina Rita de Souza
Cavalcante, Gustavo Goés
Prado, Roberto Sanchez
Costa Júnior, Lívio Martins
Rivero, Gabriela Riet Correa
Survival of Haemonchus contortus larvae in forage species in the Eastern Amazon
author_facet Pires, Claudina Rita de Souza
Cavalcante, Gustavo Goés
Prado, Roberto Sanchez
Costa Júnior, Lívio Martins
Rivero, Gabriela Riet Correa
author_sort Pires, Claudina Rita de Souza
title Survival of Haemonchus contortus larvae in forage species in the Eastern Amazon
title_short Survival of Haemonchus contortus larvae in forage species in the Eastern Amazon
title_full Survival of Haemonchus contortus larvae in forage species in the Eastern Amazon
title_fullStr Survival of Haemonchus contortus larvae in forage species in the Eastern Amazon
title_full_unstemmed Survival of Haemonchus contortus larvae in forage species in the Eastern Amazon
title_sort survival of haemonchus contortus larvae in forage species in the eastern amazon
description The objective of this work was to evaluate the survival of third-stage larvae (L3) of Haemonchus contortus in forage species in the Eastern Amazon. Four paddocks composed of Megathyrsus maximus 'Massai', M. maximus 'Mombaça', Urochloa brizantha 'Marandu', and Urochloa humidicola were used and divided into 13 plots each. Sheep feces containing about 10,000 eggs of H. contortus were deposited in each plot. Grass, feces, and soil samples were collected on the seventh, fifteenth, and thirtieth day post-contamination (DPC), and, then, they were sequentially collected every 30 days until the three-hundredth and thirtieth DPC. The following data were determined for the grass species: microclimatic, such as temperature, relative humidity, soil moisture, and grass luminosity, as well as macroclimatic data for rainfall, temperature, relative humidity, and solar radiation. L3 were recovered on all grasses and soil samples, in all plots, from the seventh to the three-hundredth and thirtieth DPC. The microclimatic parameters show correlations between the L3 recovery on grass and in the soil, and the macroclimatic parameters, between the L3 recovery in feces and on grass. Urochloa humidicola and M. maximus 'Massai' favor the development and survival of L3 of H. contortus, while U. brizantha 'Marandu' and M. maximus 'Mombaça' show a lower bioavailability of these larvae. 
publisher Pesquisa Agropecuaria Brasileira
publishDate 2022
url https://seer.sct.embrapa.br/index.php/pab/article/view/27068
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