Step 1: Understanding the Concept:
Pesticides are categorized based on their specific target pests, such as fungi, bacteria, mites, or nematodes.
Matching active ingredients with their functional pesticide group is fundamental to chemical pest control.
Step 2: Detailed Explanation:
Let us match the pesticide groups with their corresponding chemical compounds:
1. Bactericide: Used to control bacterial diseases in plants. Streptomycin (an aminoglycoside antibiotic) is a standard bactericide used to treat bacterial blights and cankers. Thus, (A) matches with (III).
2. Fungicide: Chemically controls fungal pathogens. Carbendazim is a systemic benzimidazole fungicide widely used to control a broad spectrum of fungal diseases. Thus, (B) matches with (II).
3. Acaricide: Specifically targets and kills phytophagous mites. Dicofol is an organochlorine chemical with strong acaricidal activity. Thus, (C) matches with (IV).
4. Nematicide: Targets plant-parasitic nematodes. Abamectin is an avermectin compound that is highly effective against root-knot and other plant nematodes. Thus, (D) matches with (I).
This matches the pattern: (A) - (III), (B) - (II), (C) - (IV), (D) - (I).
Step 3: Final Answer:
Therefore, the correct matching option is (D).