Principles of Weed Science

Daffodil International University Department of Agricultural Science Faculty of Agriculture Sciences Mid-term Examination, Fall 2026 Course Code: 0811 2101 Course Title: Principles of Weed Science Teacher Initial: DMH, SA Level and Term: 2-1 Section: 253 (A, B, C) Time: 1 hour and 30 minutes Total Marks: 25 "Split answering is strictly prohibited" Marks 1. Briefly explain the following terms: PLO1,CLO1,C1 5 a. Crop-weed Association b. Sedge weeds c. Perennial weeds d. Exotic weed e. Vegetative propagation 2. Classify weeds based on their life cycle. Provide examples with scientific names. PLO1,CLO1,C2 5 3. (a) Explain the concept of a weed with a suitable example. What makes weeds stronger than crops? PLO2,CLO4,C4 3 (b) How do weeds affect crop production and human welfare? PLO2,CLO4,C4 2 4. How do weeds propagate through vegetative organs? Discuss with examples. PLO3,CLO3,C2 5 5. A cropland was weed-free in 2025 but became weed-infested in the 2026 cropping season. What could have transported the weeds into the new field? Discuss the ways, with examples. PLO2,CLO5,C2 5