Which of the following is not a beneficial insect?

Options

A. Apis
B. Laccifer
C. Locusta
D. Bombyx

Answer

To determine which of the following is not a beneficial insect, we will analyze each option provided:

1. **Apis (Bees)**:
- Bees are crucial for pollination, which is essential for the reproduction of many plants. They also produce honey, which is a valuable food resource for humans. Therefore, bees are considered beneficial insects.

2. **Lassiefer (Silkworms)**:
- Silkworms are known for producing silk, which is an economically important fiber used in textiles. They play a significant role in the silk industry, making them beneficial insects.

3. **Locusta (Grasshoppers)**:
- Grasshoppers, particularly the species referred to as Locusta, are known to be pests. They can cause significant damage to crops by consuming large amounts of vegetation, which negatively impacts agriculture. Therefore, they are not considered beneficial insects.

4. **Bombix (Silk Moths)**:
- Bombix mori, or the silk moth, is another insect that produces silk. Like silkworms, they are important for the silk industry and therefore are beneficial insects.

Based on the analysis, the insect that is not beneficial is **Locusta (Grasshoppers)**.

**Final Answer**: Locusta is not a beneficial insect.

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