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Common Cocklebur (Xanthium strumarium) Response to Nicosulfuron

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Authors
Božić, Dragana
Barac, Miroljub
Saric-Krsmanović, Marija
Pavlović, Danijela
Ritz, Christian
Vrbničanin, Sava
Article (Published version)
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Abstract
The response of two populations (CC1, 43.59 degrees N & 20.40 degrees E; CC2, 44.46 degrees N & 20.17 degrees E) of common cocklebur (Xanthium strumarium L.) to nicosulfuron was investigated both in field experiments and in the laboratory. Population CC1 had no history of treatment with any herbicide, while population CC2 was treated with ALS inhibitor herbicides for six consecutive years. In the field, plants were treated post-emergence with nicosulfuron (0, 10, 20, 40, 60 and 80 g ai ha(-1)) at four true leaves. Visual injury estimation and vegetative parameters (plant height, fresh weight, leaf area) were recorded about month after herbicide application. The acetolactate synthase (ALS) enzyme activity in response to herbicide concentrations of 0, 0.01, 0.1, 1, 10, 100 mu M was determined in vitro. GR(50) values for vegetative parameters and 150 values for ALS activity were slightly greater for the CC2 than for the CC1 population, but the results confirmed that neither population was... susceptible to nicosulfuron. Namely, based on results for fresh weight, the population CC1 was about 3.9 and 2.6-fold more susceptible CO nicosulfuron than population CC2 in two consecutive years, but differences were not so prominent for other parameters (plant height, leaf area and ALS activity), ranging from 1.18 to 1.8-fold. The differences between population CC1 and CC2 could be attributed to inter-population variability in susceptibility CO nicosulfuron or could be the consequence of repeated application of ALS herbicides to the CC2 population during the six previous years. Future investigations are necessary in order to clarify this dilemma.

Keywords:
ALS enzyme activity / herbicide / vegetative parameters / weed
Source:
Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 2015, 43, 1, 186-191
Publisher:
  • Univ Agr Sci & Veterinary Med Cluj-Napoca, Cluj-Napoca
Projects:
  • Development of integrated management of harmful organisms in plant production in order to overcome resistance and to improve food quality and safety (RS-46008)
  • Advancing research in agricultural and food sciences at Faculty of Agriculture, University of Belgrade (EU-316004)

DOI: 10.15835/nbha4319705

ISSN: 0255-965X

WoS: 000357000600028

Scopus: 2-s2.0-84952776998
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URI
http://plantarum.izbis.bg.ac.rs/handle/123456789/403
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