Data from: Release and establishment of the weevil Mecinus janthiniformis for biological control of Dalmatian toadflax in southern California

Published by Agricultural Research Service | Department of Agriculture | Metadata Last Checked: January 27, 2026 | Last Modified: 2025-11-21

We monitored populations of the stem weevil, Mecinus janthiniformis, the invasive alien weed Dalmatian toadflax (Linaria dalmatica) and other vegetation to document the impact of using M. janthiniformis as a biological control agent of L. dalmatica. Weevils were released in 2008 and again in 2014 after a wild fire. The results document increases and spread of weevil populations, decrease in Dalmatian toadflax and changes in cover of some vegetation classes. Resources in this dataset:Resource Title: Consolidated data dictionary. File Name: consolidated_HV_meta.csvResource Description: Description of variables in Condensed_HV data fileResource Software Recommended: Microsoft Excel,url: http://www.microsoft.com Resource Title: Consolidated data. File Name: consolidated_HV.csvResource Description: Condensed data for each site by year for plant size, weevil density, vegetation cover and meteorological data, 2008-2019.Resource Software Recommended: Microsoft Excel,url: http://www.microsoft.com Resource Title: Cover_2008 data dictionary. File Name: cover_2008_HV_meta.csvResource Description: description of variables in the file cover_2008_HVResource Software Recommended: Microsoft Excel,url: http://www.microsoft.com Resource Title: vegetation cover 2008. File Name: cover_2008_HV.csvResource Description: vegetation cover 2008-2011Resource Software Recommended: Microsoft Excel,url: http://www.microsoft.com Resource Title: vegetation cover 2013 data dictionary. File Name: cover_2013_HV_meta.csvResource Description: description of variables in the file cover_2013_HV, which contains vegetation cover 2013-2019Resource Title: vegetation cover 2013. File Name: cover_2013_HV.csvResource Description: vegetation cover 2013-2019Resource Software Recommended: Microsoft Excel,url: http://www.microsoft.com Resource Title: dissections 2009 data dictionary. File Name: dissections_2009_HV_meta.csvResource Description: Description of variables in the file dissections_2009_HV, containing dissections of toadflax stems 2009-2011Resource Software Recommended: Microsoft Excel,url: http://www.microsoft.com Resource Title: dissections 2009-2011. File Name: dissections_2009_HV.csvResource Description: Data from dissection of toadflax stems 2009-2011Resource Software Recommended: Microsoft Excel,url: http://www.microsoft.com Resource Title: dissections 2012 data dictionary. File Name: dissections_2012_HV_meta.csvResource Description: description of variables in the file dissections_2012_HV, containing data from dissections of toadflax stems 2012-2019Resource Title: dissections 2012-2019. File Name: dissections_2012_HV.csvResource Description: data from dissection of toadflax stems 2012-2019Resource Software Recommended: Microsoft Excel,url: http://www.microsoft.com Resource Title: stem_counts data dictionary. File Name: stem_counts_HV_meta.csvResource Description: description of variables in the file stem_counts_HV, which contains data on number of toadflax stems in 25 x 50 cm quadrats, 2008-2013Resource Software Recommended: Microsoft Excel,url: http://www.microsoft.com Resource Title: stem_counts. File Name: stem_counts_HV.csvResource Description: Number of toadflax stems in 25 x 50 cm quadrats, 2008-2013Resource Software Recommended: Microsoft Excel,url: http://www.microsoft.com Resource Title: stem_height data dictionary. File Name: stem_height_HV_meta.csvResource Description: description of variables in the file stem_height_HV.csv, which contains data on height of live Linaria dalmatica stems, 2008-2019Resource Software Recommended: Microsoft Excel,url: http://www.microsoft.com Resource Title: stem_height. File Name: stem_height_HV.csvResource Description: height of live stems of Linaria dalmatica, 2008-2019Resource Software Recommended: Microsoft Excel,url: http://www.microsoft.com

Find Related Datasets

Click any tag below to search for similar datasets

Complete Metadata

@type	dcat:Dataset
accessLevel	public
bureauCode	[ "005:18" ]
contactPoint	{ "fn": "Smith, Lincoln", "hasEmail": "mailto:Link.smith@usda.gov" }
description	<p>We monitored populations of the stem weevil, <em>Mecinus janthiniformis</em>, the invasive alien weed Dalmatian toadflax (<em>Linaria dalmatica</em>) and other vegetation to document the impact of using <em>M. janthiniformis</em> as a biological control agent of <em>L. dalmatica</em>. Weevils were released in 2008 and again in 2014 after a wild fire. The results document increases and spread of weevil populations, decrease in Dalmatian toadflax and changes in cover of some vegetation classes. </p><div><br>Resources in this dataset:</div><br><ul><li><p>Resource Title: Consolidated data dictionary.</p> <p>File Name: consolidated_HV_meta.csv</p><p>Resource Description: Description of variables in Condensed_HV data file</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li><br><li><p>Resource Title: Consolidated data.</p> <p>File Name: consolidated_HV.csv</p><p>Resource Description: Condensed data for each site by year for plant size, weevil density, vegetation cover and meteorological data, 2008-2019.</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li><br><li><p>Resource Title: Cover_2008 data dictionary.</p> <p>File Name: cover_2008_HV_meta.csv</p><p>Resource Description: description of variables in the file cover_2008_HV</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li><br><li><p>Resource Title: vegetation cover 2008.</p> <p>File Name: cover_2008_HV.csv</p><p>Resource Description: vegetation cover 2008-2011</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li><br><li><p>Resource Title: vegetation cover 2013 data dictionary.</p> <p>File Name: cover_2013_HV_meta.csv</p><p>Resource Description: description of variables in the file cover_2013_HV, which contains vegetation cover 2013-2019</p></li><br><li><p>Resource Title: vegetation cover 2013.</p> <p>File Name: cover_2013_HV.csv</p><p>Resource Description: vegetation cover 2013-2019</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li><br><li><p>Resource Title: dissections 2009 data dictionary.</p> <p>File Name: dissections_2009_HV_meta.csv</p><p>Resource Description: Description of variables in the file dissections_2009_HV, containing dissections of toadflax stems 2009-2011</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li><br><li><p>Resource Title: dissections 2009-2011.</p> <p>File Name: dissections_2009_HV.csv</p><p>Resource Description: Data from dissection of toadflax stems 2009-2011</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li><br><li><p>Resource Title: dissections 2012 data dictionary.</p> <p>File Name: dissections_2012_HV_meta.csv</p><p>Resource Description: description of variables in the file dissections_2012_HV, containing data from dissections of toadflax stems 2012-2019</p></li><br><li><p>Resource Title: dissections 2012-2019.</p> <p>File Name: dissections_2012_HV.csv</p><p>Resource Description: data from dissection of toadflax stems 2012-2019</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li><br><li><p>Resource Title: stem_counts data dictionary.</p> <p>File Name: stem_counts_HV_meta.csv</p><p>Resource Description: description of variables in the file stem_counts_HV, which contains data on number of toadflax stems in 25 x 50 cm quadrats, 2008-2013</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li><br><li><p>Resource Title: stem_counts.</p> <p>File Name: stem_counts_HV.csv</p><p>Resource Description: Number of toadflax stems in 25 x 50 cm quadrats, 2008-2013</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li><br><li><p>Resource Title: stem_height data dictionary.</p> <p>File Name: stem_height_HV_meta.csv</p><p>Resource Description: description of variables in the file stem_height_HV.csv, which contains data on height of live Linaria dalmatica stems, 2008-2019</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li><br><li><p>Resource Title: stem_height.</p> <p>File Name: stem_height_HV.csv</p><p>Resource Description: height of live stems of Linaria dalmatica, 2008-2019</p><p>Resource Software Recommended: Microsoft Excel,url: <a href="http://www.microsoft.com">http://www.microsoft.com</a> </p></li></ul><p></p>
distribution	[ { "@type": "dcat:Distribution", "title": "consolidated_HV_meta.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369542" }, { "@type": "dcat:Distribution", "title": "consolidated_HV.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369545" }, { "@type": "dcat:Distribution", "title": "cover_2008_HV_meta.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369548" }, { "@type": "dcat:Distribution", "title": "cover_2008_HV.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369551" }, { "@type": "dcat:Distribution", "title": "cover_2013_HV_meta.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369554" }, { "@type": "dcat:Distribution", "title": "cover_2013_HV.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369557" }, { "@type": "dcat:Distribution", "title": "dissections_2009_HV_meta.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369560" }, { "@type": "dcat:Distribution", "title": "dissections_2009_HV.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369563" }, { "@type": "dcat:Distribution", "title": "dissections_2012_HV_meta.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369566" }, { "@type": "dcat:Distribution", "title": "dissections_2012_HV.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369569" }, { "@type": "dcat:Distribution", "title": "stem_counts_HV_meta.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369572" }, { "@type": "dcat:Distribution", "title": "stem_counts_HV.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369575" }, { "@type": "dcat:Distribution", "title": "stem_height_HV_meta.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369578" }, { "@type": "dcat:Distribution", "title": "stem_height_HV.csv", "format": "csv", "mediaType": "text/plain", "downloadURL": "https://ndownloader.figshare.com/files/43369581" } ]
identifier	10.15482/USDA.ADC/1522564
keyword	[ "ARS", "Dalmatian toadflax", "Linaria dalmatica", "Mecinus janthiniformis", "NP304", "biological control", "data.gov", "invasive alien plant" ]
license	https://www.usa.gov/publicdomain/label/1.0/
modified	2025-11-21
programCode	[ "005:040" ]
publisher	{ "name": "Agricultural Research Service", "@type": "org:Organization" }
spatial	"{"type": "Point", "coordinates": [-118.89994, 34.788891]}"
temporal	2008-05-19/2019-05-08
title	Data from: Release and establishment of the weevil Mecinus janthiniformis for biological control of Dalmatian toadflax in southern California