Which weedicide can defoliate the complete forest?

Options

A. 2, 4-D
B. AMO–1618
C. MH
D. ABA

Answer

**Step-by-Step Solution:**

1. **Understanding Defoliation**: The term "defoliate" can be broken down into two parts: "de-" which means removal, and "foliate" which relates to foliage or leaves. Thus, defoliation refers to the process of removing leaves from a plant.

2. **Identifying the Weedicides**: The question asks for a weedicide that can defoliate an entire forest. We need to analyze the given options to determine which one is capable of causing leaf removal.

3. **Evaluating Option 1 - 2,4-D (2,4-Dichlorophenoxyacetic acid)**: This chemical is known to induce excessive growth in plants. When plants grow excessively, they can shed their leaves prematurely. Therefore, 2,4-D can lead to defoliation.

4. **Evaluating Option 2 - Amo 1618**: This weedicide inhibits plant growth and development. Since it does not promote leaf shedding, it cannot be the answer.

5. **Evaluating Option 3 - MH (Malic Hydrazide)**: Similar to Amo 1618, malic hydrazide is a growth inhibitor. It does not cause defoliation, so it is not the correct answer.

6. **Evaluating Option 4 - ABA (Abscisic Acid)**: This is a natural plant hormone that acts as a growth inhibitor. It does not promote defoliation, thus it cannot be the answer.

7. **Conclusion**: After evaluating all options, 2,4-D is the only weedicide that can induce defoliation by promoting excessive growth, which leads to premature leaf shedding. Therefore, the correct answer is **2,4-D**.

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