Distribution of nematode larvae of sheep in tropical pasture plants

Gazda, Tatiana Louise; Piazzetta, Ricardo Guimarães; Dittrich, João Ricardo; Monteiro, Alda Lúcia Gomes; Soccol, Vanete Thomaz

doi:10.1016/j.smallrumres.2009.02.004

Cited by 10 publications

(6 citation statements)

References 12 publications

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“…Paniago et al ( 2014) collect biweekly samples of Marandu palisade grass contaminated with sheep feces for up to 65 days and demonstrated a significant reduction in the number of larvae recovered over time, which can be represented by the equation L3 = 44,104 -0.698 days. Several other authors observed a reduction in the number of infectious larvae after artificial contamination of the pasture (Gazda et al 2009;Oliveira et al 2009;Santos et al 2012;Troncha et al 2019) Although the present study did not find any significant difference between the L3 mean found in different forage species, further studies are still required, seeking to identify factors favorable to the reduction of parasitic load in forages plants. This will imply a reduction in the use of chemical methods to control worms, reducing production costs and pressure on the selection of resistant parasites.…”

Section: Discussioncontrasting

confidence: 78%

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Vertical migration of Haemonchus sp. infectant larvae on Stylosanthes spp. and Brachiaria brizantha (Syn. Urochloa brizantha) cv. Marandu forage

Urzedo

Santos²,

Cuccato³

et al. 2022

Biosci. J.

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The present work aimed to evaluate the influence of Stylosanthes spp. (Campo Grande© styles) and Brachiaria brizantha cv. Marandu in the vertical migration of Haemonchus spp. infective larvae, in the region of Uberlândia, Minas Gerais. Seeds of Stylosanthes spp. and Brachiaria brizantha cv. Marandu were planted in 50 pots of five liters (20 cm diameter) evenly disposed in an area of the Capim Branco Experimental Farm, Federal University of Uberlândia. When both species reached the minimum height of 20 cm, the pots were experimentally contaminated with sheep feces coprocultures. Samplings were performed, with complete removal of the vegetal material contained in the pots, on days one, three, six, 10 and 14 after contamination. Nematoids were recovered from the plant samples by thermo and hydrotropism, counted under an optical microscope and identified. For statistical analysis, the data were analyzed in a completely randomized design (DIC) in a 2X5 factorial scheme (two fodder species X 5 collection dates). No effect of the forage species was observed on the number of L3 of Haemonchus sp. recovered in the feces (p = 0.7790), upper stratum (p = 0.1755) or lower stratum (p = 0.7883) of the forage, however, there was a significant decrease in the number of L3 found with the passing of the days. When comparing the mean L3 recovered in the upper (0.06±0.31 L3) and lower (2.94±0.39) strata, a higher number of larvae was observed in the lower stratum (p < 0.0001). Therefore, in both forage species studied, the upper stratum of the plants, preferably pastured by the animals, remained with less contamination of infective larvae and the contamination tended to decrease over the days.

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Section: Discussioncontrasting

confidence: 78%

“…The results are also similar to those obtained by Santos et al (2012) for B. decumbens, during July and August 2009, in the region of Botucatu, São Paulo. Gazda et al (2009) also found a higher concentration of L3 in the lower portion of forage Paspalum notatum cv. Saurae and Panicum maximum (Syn.…”

Section: Discussionmentioning

confidence: 72%

Vertical migration of Haemonchus sp. infectant larvae on Stylosanthes spp. and Brachiaria brizantha (Syn. Urochloa brizantha) cv. Marandu forage

Urzedo

Santos²,

Cuccato³

et al. 2022

Biosci. J.

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“…at different heights of tropical upright grass, from soil to the leaf tip, during summer-autumn. Similar results utilizing tropical grass species were also found by different authors (61)(62)(63)(64) proving that sward height control has limited action against parasite infection in tropical pastures. Adjusting pasture height may be more important for temperate conditions (65,66).…”

Section: Gastrointestinal Parasitessupporting

confidence: 84%

Management Strategies for Lamb Production on Pasture-Based Systems in Subtropical Regions: A Review

et al. 2020

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Sheep production on pasture plays an important role in subtropical climates around the world, with great economic and environmental relevance to those regions. However, this production is much lower than its true potential in subtropical regions, largely due to lack of knowledge of how to feed grazing lambs, and mitigate gastrointestinal parasite infections. Due to weather instability and the high growth rate of tropical grasses, it is difficult to adjust the quality and quantity of feed consumed by lambs. In addition, due to warm, wet weather during spring, summer, and autumn, gastrointestinal parasite infection can be intense on subtropical pastures. Thus, the objective of this paper is to summarize 17 years of research in southern regions of Brazil testing alternative management for sheep farmers under these challenging conditions. Our review indicates that ewes play important roles raising their lambs. Besides protecting and providing milk, they leave a better pasture structure for lamb nutrition. The use of creep feeding and creep grazing are additional alternatives to improve lamb growth. However, feeding supplementation with concentrate can deteriorate pasture quality at the end of the summer–autumn season. Gastrointestinal parasitic infections can be reduced with improved lamb nutrition, although L3 larvae of Haemonchus contortus can be present at various pasture heights. This indicates that it is difficult to control L3 ingestion solely by manipulating grazing heights. We summarize important technologies for raising lambs on pasture-based systems to make the best of high herbage growth and minimize intense parasitic infections common in subtropical regions. We discuss research results in light of the latest studies from other ecoregions and climates, although there is a lack of similar research in subtropical regions of the world.

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“…Esse aspecto é bastante prejudicial ao sistema de produção, especialmente nas condições de primavera chuvosa dessa região do Sul do Brasil, onde a contaminação larval na pastagem se eleva (Gazda et al, 2009).…”

Section: Resultsunclassified

Influência De Sistemas De Terminação De Cordeiros Sobre a Produção E Condição Sanitária Das Ovelhas Em Pastagem

Hentz¹,

Prado²,

Monteiro³

et al. 2012

AVS

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infestação parasitária e a produção e composição do leite de ovelhas com cordeiros em amamentação, em três sistemas de produção de cordeiros para corte. Ovelhas Suffolk e suas respectivas crias foram submetidas aos sistemas de produção: exclusivamente pastagem de azevém; pastagem de azevém com creep feeding ofertado aos cordeiros a 2 % do PC em matéria seca por dia; pastagem de azevém com acesso livre dos cordeiros ao creep grazing com trevo branco. Os piquetes de pastagem eram formados de azevém anual sobressemeado em Tifton-85. Os animais entraram em avaliação aproximadamente 30 dias após o parto. A idade média das ovelhas foi de 4,5 anos, distribuídas de forma homogênea entre os tratamentos. O delineamento experimental foi em blocos ao acaso. Foi observada perda de peso e de condição corporal das ovelhas após o parto, para todos os sistemas de produção, sem diferença (P>0,05) entre os mesmos. O Grau Famacha das ovelhas não variou (P>0,05) entre os tratamentos; entretanto, a infestação parasitária medida pela contagem de ovos por grama de fezes (OPG) foi maior (P<0,05) para as ovelhas com cordeiros que não recebiam suplementação. A produção diária de leite das ovelhas diferiu (P<0,05) entre os tratamentos, sendo menor no sistema em que os cordeiros não foram suplementados. Os teores de gordura, lactose, proteína e sólidos totais do leite não sofreram influência do sistema de produção de cordeiros. A produção de leite se manteve com pouca variação entre a 4ª e 10ª semanas pós-parto. A suplementação de cordeiros em creep feeding e creep grazing não influenciou o desempenho ponderal e o estado corporal das ovelhas; porém, o melhor desenvolvimento dos cordeiros suplementados nesses sistemas promoveu a maior produção de leite das mães. O sistema de produção dos cordeiros influenciou o grau de infestação parasitária das matrizes. Palavras-chave: azevém; cordeiro lactente; creep feeding; creep grazing LAMB PRODUCTION SYSTEMS AND ITS INFLUENCE ON EWE PRODUCTION AND SANITARY CONDITION IN PASTUREABSTRACT: Suffolk lactating ewes (± 4.5 years) and their respective lambs were used in a randomized block design with three replications to evaluate if the feeding system of the lambs affects performance, corporal and sanitary condition and ewes milk production and composition. Three different feeding systems were tested: 1) lambs with ewes on ryegrass pasture; 2) lambs with ewes on ryegrass pasture and creep feeding (2 % of body weight (BW)/day); and, 3) lambs with ewes on ryegrass pasture and creep grazing of white clover. Ryegrass pasture was oversowned on Tifton-85. The animals were located in the experimental area 30 days after parturition. Ewes have lost weight and body condition, but there was no significant difference between treatments for that (P>0.05). Ewes sanitary condition evaluated by the FAMACHA method did not differ (P>0.05), but parasitological infection by FEC was higher in those ewes whose lambs were not supplemented. Daily milk production differed between systems and was lower (P<0.05) when lambs were not su...

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Distribution of nematode larvae of sheep in tropical pasture plants

Cited by 10 publications

References 12 publications

Vertical migration of Haemonchus sp. infectant larvae on Stylosanthes spp. and Brachiaria brizantha (Syn. Urochloa brizantha) cv. Marandu forage

Vertical migration of Haemonchus sp. infectant larvae on Stylosanthes spp. and Brachiaria brizantha (Syn. Urochloa brizantha) cv. Marandu forage

Management Strategies for Lamb Production on Pasture-Based Systems in Subtropical Regions: A Review

Influência De Sistemas De Terminação De Cordeiros Sobre a Produção E Condição Sanitária Das Ovelhas Em Pastagem

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