Question

the chemical most often used commercially for rooting cuttings is ______.
a. indolebutyric acid
b. naphthaleneacetic acid
c. indoleacetic acid
d. talc

Explanation:

To determine the chemical most often used commercially for rooting cuttings, we analyze the options:

• Indolebutyric acid (IBA) is widely used commercially for rooting cuttings as it promotes root formation in plant cuttings effectively.
• Naphthaleneacetic acid (NAA) is also used but less commonly than IBA for commercial rooting.
• Indoleacetic acid (IAA) is a natural auxin but not as stable or commonly used commercially for this purpose.
• Talc is a carrier or diluent, not the active rooting chemical.

So the correct option is a. indolebutyric acid.

Answer:

a. indolebutyric acid