This quiz works best with JavaScript enabled. Home > Agriculture > Crop > Weeds > Weed Management – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Weed Management Quiz 1 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is considered a biological method of seed control? A) Use of natural predators and pathogens. B) Use of organic mulch. C) Flaming weeds. D) Soil solarization. Show Answer Correct Answer: A) Use of natural predators and pathogens. 2. The weed that has entered into India with helicopter tyres is A) Xanthium. B) Wild oats. C) Tribulus. D) Parthenium. Show Answer Correct Answer: C) Tribulus. 3. What is the grass-like weed with yellowish-green foliage and a three-sided stem that grows in lawns and moist areas? A) Buckhorn plantain. B) Chicory. C) Yellow nutsedge. D) Mugwort. Show Answer Correct Answer: C) Yellow nutsedge. 4. Which one of the following plants is on Pennsylvania's noxious weed list? A) Purple loosestrife. B) Garlic mustard. C) Oriental bittersweet. D) Japanese stilt grass. Show Answer Correct Answer: A) Purple loosestrife. 5. Weed that propagate s by stem cutting is A) Striga. B) Leucas. C) Xanthium. D) Cuscutta. Show Answer Correct Answer: D) Cuscutta. 6. Which is NOT categorized under herbicide classification? A) Mode of action. B) Method of application. C) Chemical structure. D) Habitat. Show Answer Correct Answer: D) Habitat. 7. The use of antidotes to protect crop from herbicide damage A) Herbicide pathogen interaction. B) Herbicide safeners. C) Herbicide- insecticide interaction. D) Herbicide- fertilizer interaction. Show Answer Correct Answer: B) Herbicide safeners. 8. Weeds dispersed by man are called A) Arthrophte. B) Anthophtye. C) Awnthopyte. D) Anthesite. Show Answer Correct Answer: B) Anthophtye. 9. Disc like reduced vegetaive bud is seen in A) Pistia. B) Lantana. C) Hydrilla. D) Wild onion. Show Answer Correct Answer: D) Wild onion. 10. Which of the following statements about portable propane flamers is false? A) They eliminate perennial weeds. B) They cause plant cells to rupture. C) They cause weeds to wilt. D) Their effects are similar to vinegar and contact chemicals. Show Answer Correct Answer: A) They eliminate perennial weeds. 11. Which is NOT the disadvantage of herbicide A) Mammalian toxicity. B) Herbicide tolerance. C) Increase production cost. D) Residue in soil environment. Show Answer Correct Answer: B) Herbicide tolerance. 12. Weed that dessiminate due to stiff hair is A) Tribulus. B) Argemone. C) Achyranthes. D) Cenchrus. Show Answer Correct Answer: D) Cenchrus. 13. Which one is formula for herbicide independent effect A) 1 + 1 = 3. B) 1 + 2 = 2. C) 1 + 1 = 1. D) 1 + 1 = 2. Show Answer Correct Answer: B) 1 + 2 = 2. 14. The buds in hydrilla are called A) Rhizome. B) Turions. C) Nuts. D) Sobole s. Show Answer Correct Answer: B) Turions. 15. Post-emergence broadleaf herbicides are best applied: A) When daily temperatures are between 65$^\circ$ and 85$^\circ$. B) When temperatures are below 65$^\circ$. C) In the summer, when temperatures are above 90$^\circ$. D) In the fall, after several hard freezes. Show Answer Correct Answer: A) When daily temperatures are between 65$^\circ$ and 85$^\circ$. 16. A hoe works best when the weather conditions are: A) Warm and wet. B) Hot and dry. C) Cool and wet. D) Cold and dry. Show Answer Correct Answer: B) Hot and dry. 17. An exotic species whose introduction causes economic or environmental harm or harm to human life is the federal government's definition of a(n): A) Invasive species. B) Quarantined species. C) Weed species. D) Noxious species. Show Answer Correct Answer: A) Invasive species. 18. The product Preen can contain the herbicide: A) Trifluralin. B) Glyphosate. C) 2, 4-D. D) All of these. Show Answer Correct Answer: D) All of these. 19. Which one of the following weeds is a biennial? A) Ground ivy. B) Canada thistle. C) Garlic mustard. D) Dandelion. Show Answer Correct Answer: C) Garlic mustard. 20. Which major element is NOT contained in organic herbicide? A) Phosphorus. B) Nitrogen. C) Ammonium. D) Carbon. Show Answer Correct Answer: C) Ammonium. 21. When using herbicides, it is important to: A) Apply on a windy day. B) Use broadcast application whenever possible. C) Have separate sprayers for each herbicide. D) Apply immediately before rain is predicted. Show Answer Correct Answer: C) Have separate sprayers for each herbicide. 22. In controlling perennial grasses such as quackgrass and nimblewill, it is best to: A) Water the foliage thoroughly after application. B) Spot treat with glyphosate. C) Apply pre-emergent herbicides in early spring. D) Apply water sparingly before treatment. Show Answer Correct Answer: B) Spot treat with glyphosate. 23. A neighbor asks your advice about the best way to eradicate weeds that are growing in driveway cracks. Suggest any of the following except: A) Boiling water. B) Hand weeding. C) 5% acetic acid (vinegar). D) Glyphosate. Show Answer Correct Answer: C) 5% acetic acid (vinegar). 24. Weed that propagate s by offset is A) Cyanodon. B) Cyperus. C) Pistia. D) Amaranth. Show Answer Correct Answer: C) Pistia. 25. Perennial weeds that live for more than two years and grow year after year from the same root include: A) Dandelion and pokeweed. B) Chickweed and henbit. C) Mullein and garlic mustard. D) Ragweed and lamb's quarter. Show Answer Correct Answer: A) Dandelion and pokeweed. 26. All of the following about glyphosate and triclopyr are true except: A) Both can control perennial and woody weeds. B) Both can control grasses and sedge weeds. C) Both have systemic post-emergent activity. D) Both can be applied to "cut surfaces.". Show Answer Correct Answer: B) Both can control grasses and sedge weeds. 27. Mode of action:Inhibit cell division or mitosis A) Seedling growth inhibitor. B) Inhibitors of fatty acid. C) Cell growth inhibition. D) Cell membrane disruptor. Show Answer Correct Answer: C) Cell growth inhibition. 28. When is the appropriate time to spray herbicide A) During windy. B) Morning. C) Afternoon. D) Evening. Show Answer Correct Answer: B) Morning. 29. Which statement is NOT TRUE? A) Herbicide provide early season weed control. B) Cultivation can injure crop roots. C) Herbicide is important when labour is expensive. D) Herbicide cannot reduce the need for tillage. Show Answer Correct Answer: D) Herbicide cannot reduce the need for tillage. 30. What is the ten foot tall plant with bamboo-like stems that grows near streams and spreads aggressively? A) Japanese honeysuckle. B) Tree of heaven. C) Japanese knotweed. D) Oriental bittersweet. Show Answer Correct Answer: C) Japanese knotweed. 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