As a last resort against pests, an organic farmer can use?

• A. Insecticides
• B. Sulfur and rotenone
• C. Neonicotinoids
• D. Herbicides

Answer: (B)

Organic farming practices typically emphasize the use of natural substances and processes to manage pests while avoiding synthetic chemicals. Among the options given, sulfur and rotenone are acceptable substances for organic farmers as they are derived from natural sources.

Sulfur is a naturally occurring element that acts as a fungicide and insecticide, helping to control pests without adversely affecting the ecosystem as synthetic pesticides would. Similarly, rotenone is a natural insecticide derived from the roots of certain plants. It's important to note that while rotenone's use has decreased due to concerns about its toxicity to aquatic life and potential health risks, it is still recognized in organic farming as a last resort for managing insect pests.

The other options listed are not suitable for organic farming. Insecticides can include synthetic chemicals that do not conform to organic standards. Neonicotinoids are a class of neurotoxic pesticides that are not permitted in organic agriculture due to their broad-spectrum toxicity and harmful effects on beneficial insects, especially pollinators. Herbicides, which are specifically used for weed control, may also involve synthetic compounds that do not align with organic practices.

Using sulfur and rotenone allows organic farmers to adhere to their principles of promoting biodiversity and environmental health while still trying to manage pest populations effectively when