Estimation of ergovaline intake of cows from grazed perennial ryegrass containing NEA2 or standard endophyte
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چکیده
منابع مشابه
Toxicity of endophyte-infected ryegrass hay containing high ergovaline level in lactating ewes.
The symbiotic association of var. (formerly named ) with perennial ryegrass () leads to the production of ergovaline (EV) and lolitrem B (LB) that are toxic for livestock. The objectives of this study were to determine the effects of feeding endophyte-infected ryegrass (SE+) hay on 16 lactating ewes (BW 80 ± 10 kg) in comparison with endophyte-free ryegrass (SE-) hay to investigate the putative...
متن کاملCorrelation of endophyte toxins (ergovaline and lolitrem B) with clinical disease: fescue foot and perennial ryegrass staggers.
Fescue foot, summer syndrome, reproductive problems, and ryegrass staggers are all diseases of livestock related to endophyte toxins in pasture grasses. Range finding experiments and case studies of fescue foot relative to ergovaline toxin found in endophyte infected tall fescue and lolitrem B present in endophyte infected perennial ryegrass were conducted. Within 42 d of initiating a feeding t...
متن کاملEffect of rumen fill on intake of fresh perennial ryegrass in young and mature dairy cows grazing or zero-grazing fresh perennial ryegrass.
Rumen fill may be a strong intake constraint for dairy cows fed on pasture, even though pasture is highly digestible in the grasslands of temperate climates. This constraint may also depend on the cows' maturity. Moreover, indoor feeding of fresh herbage may not always be a good model for the study of intake regulation at grazing. To test these hypotheses, four mature (6.3 ± 0.72 year old) and ...
متن کاملAphididae) on Fungal Endophyte-Infected and Uninfected Perennial Ryegrass
The behavior and performance of the Russian wheat aphid, Diuraphis no&r (Mordvilko), on fungal endophyte-infected and endophyte-free perennial ryegrass, Lolium perenne L., was investigated in the laboratory and field. Aphids did not select endophytefree over endophyte-infected leaf sheaths and stem segments in petri dish preference tests. Similarly, the probing behavior of D. noxia on endophyte...
متن کاملLolium Endophyte and Sheep Performance on Perennial Ryegrass Cultivars
Some effects of l&m endophyte (Acremonium lolioe) on sheep production were evaluated using pure swards of h igh (SO%>) and low (< 5%) endophyte Nui and Ar ik i ryegrass. The proportion of infected t i l lers in high endophyte treatments increased by 19% in 15 months. Ryegrass staggers occurred on both high endophyte ryegrasses being sl ight ly worse on Nui . The peak ryegrass staggers outbreak ...
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ژورنال
عنوان ژورنال: Journal of New Zealand Grasslands
سال: 2017
ISSN: 2463-2880,2463-2872
DOI: 10.33584/jnzg.2017.79.541