Harmful insect for leaves and stems of sugarcane is

Options

A. Pyrilla
B. Agrostis
C. Leptocorisa
D. Idiocercus.

Answer

To answer the question about the harmful insect for the leaves and stems of sugarcane, we will analyze the options provided and identify the correct one.

### Step-by-Step Solution:

1. **Identify the Options:**
The options given are:
- A) Pyrilla
- B) Agrostis
- C) Leptocorrhiza
- D) Idiocercus

2. **Research Each Option:**
- **Pyrilla:** This insect, specifically Pyrilla purpucilla, is known as a leaf hopper. It primarily affects sugarcane by feeding on the sap from the leaves and leaf sheaths.
- **Agrostis:** Commonly referred to as bentgrass, this is not known to be harmful to sugarcane.
- **Leptocorrhiza:** This is generally known as a rice bug and does not target sugarcane.
- **Idiocercus:** This is known as a mango leaf hopper and is not associated with sugarcane.

3. **Evaluate the Impact of Pyrilla:**
Pyrilla purpucilla causes significant damage to sugarcane by:
- Sucking sap from the leaves, leading to yellowing and drying of the leaves.
- Reducing the rate of photosynthesis, which is crucial for the plant's health.
- Secreting honeydew, which can lead to fungal infections on the leaves.

4. **Conclusion:**
Based on the information gathered, the harmful insect for the leaves and stems of sugarcane is **Pyrilla**.

### Final Answer:
The harmful insect for leaves and stems of sugarcane is **Pyrilla**.

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