Question

Statement I: In case of pre-emergence herbicides less droplet size is effective and for post-emergence herbicides bigger droplet size is desirable.
Statement II: More the size of droplet, less the chance of herbicide drift and less herbicide activity.
In light of the above statements, choose the correct answer from the options given below:

• A. Both Statement I and Statement II are true
• B. Both Statement I and Statement II are false
• C. Statement I is true but Statement II is false
• D. Statement I is false but Statement II is true

Hint:

Pre-emergence: larger droplets for soil coverage.
Post-emergence: smaller droplets for leaf coverage.
Larger droplets reduce drift.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Droplet size affects herbicide application.
Pre-emergence and post-emergence herbicides have different requirements.

Step 2: Key Formula or Approach:
No specific formula.
Need to understand herbicide application principles.

Step 3: Detailed Explanation:
Statement I: For pre-emergence herbicides, bigger droplet size is effective.
For post-emergence herbicides, smaller droplet size is desirable.
So, Statement I is false.
Statement II: Larger droplets have less drift and less herbicide activity.
This is true because larger droplets have less surface area.
Thus, Statement I is false, but Statement II is true.

Step 4: Final Answer:
Statement I is false but Statement II is true.
Hence, the correct option is (D).