Differences in sensitivity of F1 and F2 generations of herbicide tolerant sunflower volunteers to selected acetolactate synthase inhibiting herbicides

Plant, Soil and Environment

K. Hamouzová¹  J. Soukup¹  M. Jursík¹  J. Andr¹  J. Holec¹ 

关键词: Helianthus annus;    herbicide efficacy;    acetolactate synthase inhibiting herbicides;    Clearfield;    ExpressSun;   

DOI  :  

学科分类：农业科学（综合）

来源: Czech Academy of Agricultural Sciences

【 摘 要 】

The aim of this work is to describe the differences in sensitivity of Clearfield, ExpressSun and non-herbicide tolerant (HT) sunflower cultivars to several acetolactate synthase inhibitor herbicides and to find out the differences in sensitivity in F1 and F2 generations of these cultivars. Non-HT sunflower was very sensitive to most of the tested herbicides, except for nicosulfuron (efficacy 43–75%). F2 generation of non-HT sunflower showed a low level of sensitivity to imazamox (efficacy 10–43%) and to nicosulfuron, tribenuron, thifensulfuron and rimsulfuron under dry conditions (efficacy 43–83%). Sensitivity of Clearfield sunflower (cultivar with tolerance to imidazolinone herbicides) to tested sulfonylurea varied according to used herbicide and weather conditions. The highest efficacy on Clearfield sunflower showed iodosulfuron (97–100%) > florasulam (88–100%) > foramsulfuron (40–98%) > thifensulfuron (12–99%) > rimsulfuron (37–99%) > tribenuron (0–87%) > nicosulfuron (0–78%). ExpressSun sunflower (cultivar with tolerance to tribenuron) was the most tolerant to all tested herbicides. The lowest efficacy on F1 generation showed tribenuron (0%) > imazamox (0–17%) > nicosulfuron (0–43%) > thifensulfuron (0–57%) > rimsulfuron (0–70%) > foramsulfuron (8–75%) > florasulam (75–96%) > iodosulfuron (87–98%). Sensitivity of F2 generation of ExpressSun to tested herbicide was usually higher as compared to F1 generation.

【 授权许可】

Unknown