Evaluación de los factores influyentes en la aparición de resistencia a Apera spica-venti
- Publikations-Art
- Kongressbeitrag
- Autoren
- Massa, D. and Andújar, D and Mehrtens, J. and Gerhards, R.
- Erscheinungsjahr
- 2011
- Veröffentlicht in
- Proceedings of the XIII SEMh Conference
- Herausgeber
- La Sociedad Española de Malherbología y la Universidad de La Laguna
- Verlag
- Servicio de Publicaciones de la Universidad de La Laguna , Tenerife
- ISBN / ISSN / eISSN
- 978-84-615-4903-0
- Seite (von - bis)
- 153-156
- Tagungsname
- Plantas invasoras, resistencias a herbicidas y detección de malas hierbas
- Tagungsort
- La Laguna (Canary Islands)
- Tagungsdatum
- November 21-24, 2011
Factors affecting the occurrence of herbicide resistance in silky bent grass (Apera spica-venti).Since the massive adoption of chemicals as the main weed control strategy on a global scale, farmers have increasingly confronted poor herbicide performance due to the evolution of resistance. However, also other factors are known to play a role in the emergence and spread of herbicide resistance in weed populations. In this work, we evaluate the influence of agricultural and biological factors on the risk of resistance occurrence in silky bent grass (Apera spica-venti L. Beauv.). 263 silky bent grass populations were collected in several suspect fields across Europe and tested in the glasshouse for verification of actual resistance. A geo-referenced database was developed to document the spatial and temporal distribution of herbicide-resistant silky bent grass populations in Europe. Furthermore, a risk assessment model was fitted to quantify the relationships between specific agrobiological factors and the probability of resistance occurrence. Results showed that a high percentage of winter crops in the rotation (>75%) increases the risk of resistance of over 90 times. Early crop sowing, conservation tillage and high population density also significantly increase the risk of resistance, whereas soil texture did not show a significant influence. The present work underlines the importance of appropriate agricultural measures for resistance management at the farm level and provides farmers and consultants with useful tools for the prevention of herbicide resistance in weed populations