DESCRIPTION OF COURSES
AG 503 PRINCIPLES AND PRACTICES OF WEED MANAGEMENT (3L+1P) I
To provide basic and applied knowledge of weed science to the students, and to make them acquainted with weeds, herbicides, and weed management and research methods
Weeds and their importance - harmful and beneficial aspects, weed characteristics and classification.
Weed multiplication/propagation – seed dormancy, viability, germination and dissemination of weeds; crop-weed competition/ interference, allelopathy.
Weed management principles and methods/options – preventive, physical, cultural, biological, chemical and integrated weed management approaches.
History and properties of herbicides, differences with other pesticides, classification of herbicides based on miscellany, chemistry (organic and inorganic) and physiology, structure - activity and selectivity.
Herbicide injury symptoms, physiology/biochemistry of mode/mechanisms of action, herbicide transformations in plants and soil, herbicide formulations and applications; herbicide mixtures; herbicide resistance and management, herbicide residues in environment.
Weed management in major crops and cropping systems, and non-cropped situations; perennial, aquatic, parasitic and invasive weeds management.
Biotechnological applications in weed management; herbicide tolerant crops - risks and opportunities.
Weeds and weed seeds identification. Determination of IVI (impor tance value index). Methodologies in studying crop-weed interference. Calibration of a sprayer, and volume, rate and swath width calculations. Herbicide application equipment and accessories, and application techniques. Herbicide formulations demonstration. Bioassay technique for the analysis of herbicide residues in soil. Determination of LD value of herbicides. Calculations of herbicide requirements for different crops, and non-crop terrestrial and aquatic situations. Weed control experiments – types, planning, conduct and recording of data. Data transformation and calculations of weed indices. Weed herbarium preparation.