Which of the following functions as a fungicide?
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Answer: B. Bordeaux mixture
Explanation
Bordeaux mixture acts as an effective fungicide by preventing fungal spores from germinating on plant surfaces. The active copper ions disrupt essential enzyme systems within fungal pathogens, stopping infections before they spread widely. This classic formulation has protected vineyards and orchards from devastating fungal blights for more than a century. The mixture consists of a precise combination of copper sulfate pentahydrate, hydrated lime, and water. French winegrowers in the Bordeaux region originally invented this blue concoction to deter pilferers from eating roadside grapes. Agricultural chemistry classifies fungicides as chemical compounds specifically designed to eradicate or inhibit parasitic fungi.
DDT is a synthetic organochlorine insecticide utilized historically to control disease-carrying mosquitoes rather than plant fungi. Two four D functions primarily as a selective systemic herbicide designed to eliminate broadleaf weeds in lawns. DCMU is a substituted urea herbicide that inhibits photosynthesis in unwanted plants rather than controlling fungal diseases.
- Subject
- Agriculture
- Category
- Forestry
- Topic
- —
- Difficulty
- medium
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