Course code PLV340

PLV340 Weed Biology and Weed-Crop Relationships

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Showing course contents for the educational year 2022 - 2023 .

Course responsible: Lars Olav Brandsæter
Teachers: Kirsten Semb Tørresen, Liv Berge
ECTS credits: 5
Faculty: Faculty of Biosciences
Teaching language: EN, NO
(NO=norsk, EN=Engelsk)
Teaching exam periods:
This course starts in Spring parallel. This course has teaching/evaluation in Spring parallel, .
Course frequency: Odd years
First time: Study year 2013-2014
Preferential right:
Course contents:
Themes about weed biology and ecology, as well as how different weed management practices reach the weeds in a species specific way will be discussed in lectures, exercises and a self study and seminars.
Learning outcome:


  • Shall understand the biology of the different groups of weeds as well as for the most important weed species
  • Shall understand how different direct and preventive methods influence different weeds in a species dependent point of view.
  • Knowldge on weed-crop relationships, including both competition and allelopathy, and how different weed managements influence on the relationships.
  • Knowledge on innovative and site specific management strategies.


  • Shall be able to emply the knowledge for developing new strategies in different weed-crop situations.


  • Make suggestions for control strategies also for other weed species (than those that have been reviewed specifically in the course) by using general knowledge and skills for reviewed species. Evaluate and include different weed strategies in a broader point of view, including also other aspects in the agroecology perspective.
Learning activities:
The theme will be discussed in lectures, exercises and a self study and seminars.
Teaching support:
The responsible teacher will be available for consultans
Sigurd Håkansson 2003. Weeds and weed management on arable land: An Ecological approach
A first degree (bachelor or candidate degree) in biology or closely related fields. More specific, the first degree should include PLV200 or PLV210, or other cources with similar content.
Recommended prerequisites:
Mandatory activity:
Excercises, self study and seminars
Oral exams 70 %, term paper/excercise 30%.
Nominal workload:
125 hours
Entrance requirements:
Special requirements in Science
Type of course:
Lectures: about 30 hours Excercises: about 10 hours Seminars: about 10 hours
External sensor
Examination details: Combined assessment: Letter grades