In the context of insect pests attacking plants, which of the following modes of attack are observed? 1. Cutting the root, stem, and leaf. 2. They provide nutrients to the plant by sucking cell sap. 3. Boring into stems and fruits. Select the correct answer using the code given below:

Correct Option The correct option is (c) 1 and 3 only. Explanation Insect pests infest crop plants and cause damage through specific modes of feeding. These modes are categorized based on the insect's mouthparts and how they interact with plant tissues to obtain nutrition. Statement-wise Analysis - Statement 1 is Correct: Many insect pests, known as chewing or biting insects, possess mandibles adapted for cutting and consuming solid plant material. They damage the plant by cutting roots, stems, and leaves. Examples include locusts, beetles, and caterpillars. - Statement 2 is Incorrect: Sucking pests (such as aphids, leafhoppers, and plant bugs) pierce plant tissues to extract cell sap. This process deprives the plant of essential water and nutrients. Pests feed on the plant; they do not provide nutrients to it. - Statement 3 is Correct: Certain pests, known as borers, enter the plant body and tunnel through internal tissues. They bore into stems, fruits, and seeds to feed and live inside, causing significant structural damage. Examples include the sugarcane stem borer and cotton bollworm. Key Takeaway: Insect pests damage plants primarily by cutting plant parts, sucking cell sap, or boring into stems and fruits. In all cases, they deplete plant resources or destroy tissues.

In the context of insect pests attacking… - NCERT Class 9 Science MCQ

NCERT Class 9 Science — Chapter 3: Improvement in food resources

mcqeasy

In the context of insect pests attacking plants, which of the following modes of attack are observed?

Cutting the root, stem, and leaf.
They provide nutrients to the plant by sucking cell sap.
Boring into stems and fruits.

Select the correct answer using the code given below:

NCERT textbook question

From NCERT Science - class 9 · Page 145

Options

A1 and 2 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is (c) 1 and 3 only.

Explanation

Insect pests infest crop plants and cause damage through specific modes of feeding. These modes are categorized based on the insect's mouthparts and how they interact with plant tissues to obtain nutrition.

Statement-wise Analysis

Statement 1 is Correct: Many insect pests, known as chewing or biting insects, possess mandibles adapted for cutting and consuming solid plant material. They damage the plant by cutting roots, stems, and leaves. Examples include locusts, beetles, and caterpillars.
Statement 2 is Incorrect: Sucking pests (such as aphids, leafhoppers, and plant bugs) pierce plant tissues to extract cell sap. This process deprives the plant of essential water and nutrients. Pests feed on the plant; they do not provide nutrients to it.
Statement 3 is Correct: Certain pests, known as borers, enter the plant body and tunnel through internal tissues. They bore into stems, fruits, and seeds to feed and live inside, causing significant structural damage. Examples include the sugarcane stem borer and cotton bollworm.

Key Takeaway: Insect pests damage plants primarily by cutting plant parts, sucking cell sap, or boring into stems and fruits. In all cases, they deplete plant resources or destroy tissues.

Your note

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