Author:
Abu-Nassar Jackline,Wallach Amit,Winkler Eilon,Eizenberg Hanan,Matzrafi Maor
Abstract
AbstractAmaranthus palmeriS. Watson is a dioecious annual weed species, originating from the Southern USA, spreading rapidly beyond its original range into Europe and the Mediterranean region. In Israel,A. palmeridistribution has expanded quickly in recent years, with farmers reporting on weed control failure using acetolactate synthase (ALS) inhibitors. Furthermore, recent studies have documented glyphosate-resistant cases from other countries in the region, such as Spain, Greece, and Turkey. We conducted a survey in order to understandA. palmeridistribution and study the occurrence of herbicide resistance to both glyphosate and trifloxysulfuron in different fields across the country. According to our data,A. palmeripopulation locations are aligned with the major agricultural areas for summer field crops, including the Hula Valley, Jezreel Valley, and the Southern Coastal Plain. Regarding herbicide responses, while several populations showed a reduced response to glyphosate, dose-response assays did not show resistance to the recommended labeled field rate. For the ALS inhibitor trifloxysulfuron, the proportion of resistant individuals was very high, especially in the southern coastline region, with an R-value of 0.77. Four populations used for dose-response studies were highly resistant, surviving at four times the recommended labeled field rate of trifloxysulfuron (30 g a.i. ha-1). Sequencing of the ALS gene, Trp574 to Leu alteration in resistant populations was recorded. The high level of resistance observed in this study, alongside the target-site mutation found in populations ofA. palmeri, endangers the future use of ALS inhibitors in corn, cotton, and other summer crops grown in Israel.
Publisher
Cold Spring Harbor Laboratory
Reference25 articles.
1. Weed science: Distribution of glyphosate-resistant palmer amaranth (Amaranthus palmeri) in Georgia and North Carolina during 2005 and 2006;Journal of Cotton Science,2008
2. Danin, A. (2022). Flora of Israel online. http://www.flora.huji.ac.il.
3. Advances in site-specific weed management in agriculture - A review;Weed Research,2022
4. BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT;Nucleic Acids Symposium Serious,1999
5. Heap, I. (2023). The international survey of herbicide resistant weeds. http://weedscience.org.