Show simple item record

dc.contributor.advisor
dc.contributor.authorSchwarz, Mary
dc.contributor.authorBonhotal, Jean
dc.date.accessioned2016-05-17T12:45:46Z
dc.date.available2016-05-17T12:45:46Z
dc.date.issued2016
dc.identifier.urihttps://hdl.handle.net/1813/43912
dc.description.abstractEctoparasites and anthelmintics used to control external and internal parasites in livestock are largely excreted in manure in concentrations that are lethal or sub-lethal to beneficial organisms in the ecosystem. The objective of this study was to determine whether composting would reduce the concentration of ivermectin found in the manure of de-wormed horses. The effect of ivemectin on the composting process was also investigated. Manure and bedding from 60 horses at Oxley Equestrian Facility, Cornell University, Ithaca, NY de-wormed with 114 mg ivermectin paste each, was collected over a 3-day period in 2011 for composting. The presence of ivermectin did not appear to affect the composting process as shown by thermophilic temperatures and proper mass loss. There was a severe drop in ivermectin concentration in the manure/bedding mixture within the first few days of composting indicating exponential decay. This decay occurred at a rate of 1.8% per day with a half-life of 3.6 days. After 175 days of composting, ivermectin concentration decreased from an average of 1.59 mg/kg in the initial mixture to 0.6 mg/kg in the composted material and was not detected in the soil below the pile. However, potentially mineralizable nitrogen, a measure of microbial activity in soil, decreased in the soil on which the pile was built.en_US
dc.description.sponsorshipUSDA-Cooperative State Research , Education and Extension Serviceen_US
dc.language.isoen_USen_US
dc.publisherCornell Waste Management Instituteen_US
dc.subjectivermectinen_US
dc.subjectmanure compostingen_US
dc.subjectveterinary pharmaceuticals
dc.subjectanthelmintics
dc.subjectsoil macro- and microorganisms
dc.titleThe Fate of Ivermectin in Manure Compostingen_US
dc.typetechnical reporten_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

Statistics