Weed Sceince and management (226347)

Course description

Due to the trend of environmentally friendly plant protection from weeds, it is important a good knowledge of the main features of the herbicide. The lecture topics are: fundamentals of weed science – weed biology ,recent weed control-weed management-Integrated weed management, screening of herbicides and EU legislation framework, toxicology of herbicides, herbicide nomenclature and classification, herbicide properties (persistence, selectivity, efficacy, eco-toxicological characteristics), absorption of herbicides, herbicide-soil interaction, mode of action of herbicides, methods for herbicide efficacy and selectivity evaluation

Type of course

ECTS: 3.00

English language: L2

Teaching hours: 30
Lectures: 19
Practicum: 9
Seminar: 2

Associate teacher for exercises
Associate teacher for seminars

Sufficient (2): 60-70%
Good (3): 71-80%
Very good (4): 81-90%
Excellent (5): 91-100%

Conditions for obtaining signature

To attend lectures (at least 80%), exercises (100%) and seminars (100%).
To create and present seminar papers (essays) in due time.

General competencies

The subject allows the student the skills and competencies in the area of working with herbicide sprays on their own economy or as a consultant to other professional users of the herbicide. Competent for the activity in the field of transport of herbicides (Advisor, agent, Distributor, agricultural chemist's). Acquires the basic knowledge required for the higher level of learning and working with herbicide sprays

Types of instruction

  • Lectures
    Lectures will deal with the following topics: weed biology and ecology, weed management, herbicide regtistration process, herbicide nomenclature and classification, application time of herbicides, herbicide absorption, soil herbicide interaction, mode of herbicide
  • Laboratory practice/exercises
    laboratory – herbicide efficacy experiment – set up, evaluation of herbicicide experiment, herbicide efficacy and selectivity assessments
  • Practicum
    weed seedling determination, MoA herbicide classification, calculation of herbicide dose,
  • Field work
    2 h Field lesson at Agriculture faculty Zagreb Experimental station (Sasinovecki Lug)
  • Seminars
    herbicide – classification, time of application, mode of action, translocation in the plant

Learning outcomes

Learning outcome Evaluation methods
To identify the role and importance of controlling weeds in the crop production and the importance of food production in general. Final exam
To distinguish the advantages and disadvantages of chemical methods of weed control Final exam
To define the main terms of herbicide toxicology and properties of herbicides Final exam
To define the classification of herbicides and practical significance for each classification Final exam
To describe the main abiotic and biotic factors for herbicide efficacy Final exam. Seminar
To explain the interaction of herbicide with pedo-climatic conditions Final exam
To describe and connect the symptoms of herbicide efficacy with the mode of action of herbicides Laboratory report
To evaluate herbicide efficacy and selectivity Laboratory report

Working methods

Teachers' obligations

- to give lectures, exercises and seminars as scheduled; to provide all necessary information and material concerning the Course; to provide consultations; to evaluate seminar papers (laboratory reports) and their presentations; to organize, conduct and evaluate partial tests during the semester and final exam during the exam terms

Students' obligations

- to attend lectures, exercises and seminars; to create and orally present seminar papers in due time and to deliver written reports on laboratoy alanyses.
Students deliver their written reports on laboratory analyses, which they carried out during laboratory exercises. These reports contain the descriptions of the applied methodology, the obtained results and their interpretations.

Methods of grading

Evaluation elements Maximum points or Share in evaluation Grade rating scale Grade Direct teaching hours Total number of average student workload ECTS
Seminar in herbicides 30% 0-59%
60-70 %
71-80 %
81-90 %
91-100 %
Insufficient (1)
Sufficient (2)
Good (3)
Very good (4)
Excellent (5)
7,5 27 0,9
Final writtem exam 70% 0-59 %
60-70 %
71-80 %
81-90 %
91-100 %
Insufficient (1)
Sufficient (2)
Good (3)
Very good (4)
Excellent (5)
28 63 6,3
Total 100 % 30 90 3
Evaluation elements Description Deadline Recoupment
Seminar in herbicides Students get instructions and material needed to present a individual work about specific herbicide he/she gets at first class. Afterwards, they work individually. On the scheduled date, they present them orally using a multimedia presentation Last week of semester If the student does not present the seminar in due time, she/he will not get the chance to approach the final exam. If this report is positively evaluated by the teacher, the student will approach the final exam.
Final writtem exam About 35 open-type questions (listing, describing, defining, calculating, etc.) dealing with the topics covered during all 15 weeks of the semester. On the regular exam terms that are visible in the ISVU system

Weekly class schedule

  1. L –Introduction lesson to world of herbicides and world of weed science. History of plant protection products
  2. L - Definition of term weeds, weed characteristic, weed biology – classification of weeds, weed seed and vegetative reproduction , weed dispersal, germination and dormancy of weed seeds
  3. L -Field lesson Experimental station Šašinovečki Lug - weed species determination in the field– according to leaf characteristics (broadleaf and narrow leaf weed species), according to life cycle (annual and perennial) and according to scientific classification (family)
  4. E Importance of weed identification in early growth stage (seedling stage), differences between monocotyledon and dicotyledonous weed species in early growth stage, keys for seedling identification. Practical (individual) work – weed seedling identification for economic important weed species
  5. L Recent weed control, weed control and integrated weed control. Role of herbicides in integrated wed control, advantages and disadvantages of chemical weed control
  6. L Screening of herbicides, EU pesticide legislation framework, research goal for new active ingredient, institutions responsable for herbicide registration, zonal system registration in EU
  7. L Definition of pesticide (herbicide) hazard and risk terms, toxicology of herbicides, descriptive toxicology (LD50, NOEL, ADI ArFD, MDK), toxicological test
  8. L Herbicide nomenclature – chemical name, common name, trade name, classification of herbicides – chemical similarity, mechanism of action, herbicide movement within the plant, selectivity, application and use patterns E Practical work – herbicide classification (HRAC) according to mode of action
  9. L Application time – pre-sowing, pre-emergence and post-emergence, E Herbicide formulation – formulation type – dry formulations and liquid formulations, Practical tasks – calculation of herbicide dose
  10. L Herbicide absorption of residual herbicide – root absorption, shoot absorption and absorption across plant membrane; foliage absorption of post emergence herbicides L Laboratory experiment for efficacy of different herbicide doses to test species
  11. L Herbicide performance in the soil (water solubility, retention by organic matter or soil, vapore pressure, soil half life), persistence in the soil - degradation and transfer process, pedo-climatic factors affecting the persistence in the soil -
  12. E Evaluation of herbicide experiment (set up two weeks ago), calculation of germinated seeds, ridicule and coleoptile length and fresh plant biomass, statistical data analysis
  13. L Herbicides from the group of inhibitors of photosynthesis, respiration and cell wall synthesis, ALS inhibiotrs, synthesis of carothenoides and EPSH synthase, inhibitors of glutamine synthetase, PPO and DPH synthase, inhibitors of synthesis of lipids, synthetic auxins and AcCoA carboxylase
  14. E EPPO standard PP 1/223(2) Introduction to the efficacy evaluation of plant protection products , efficacy testing – visual and measurable, crop safety assessment – visual and measurable
  15. S Student presentation about course content

Obligatory literature

  1. A.H. Cobb A.H., Kirkwood R.C. (2000). Herbicides and their mechanisms of action
  2. Hance (1980). Interactions between herbicides and the soil
  3. Herbicide handbook (ninth edition) - ed. Senseman S.A. (2007)
  4. Relevant scientific and professional work of teacher (available at Merlin)
  5. Cobb A.H., Reade J.P.H. (2010). Herbicides and plant physiology

Similar course at related universities

  • Phytopharmacology (BOKU - University of Natural Resources and Life Sciences, Vienna)
  • Fitofarmaci ed ambiente – Universita degli studi di Padova
  • Toxicology, ecotoxicology and chemistry of pesticides- University of Belgrade, Faculty of Agriculture
  • Phytopharmacy – Herbicides - University of Belgrade, Faculty of Agriculture

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