Which of the following statements is correct regarding the storage of grains?

The correct option is: Biotic factors responsible for losses in stored grains are insects, rodents and fungi.

To understand why this statement is correct, let us break down the factors that cause damage and loss to agricultural produce during storage. These factors are broadly classified into two categories: biotic and abiotic factors.

1. Biotic Factors: These are the living organisms that damage the stored grains. Examples include insects, rodents (like rats and mice), fungi, mites, and bacteria. These organisms feed on the grains, contaminate them with their excreta, or cause diseases, leading to a loss in weight, poor germinability, and discoloration of the product.
2. Abiotic Factors: These are the non-living environmental or physical parameters that affect the stored grains. Examples include moisture content of the grains, temperature of the storage environment, and humidity of the air.

Let us analyze the given options based on these definitions:

• "Abiotic factors responsible for losses in stored grains are temperature, rodents and fungi." – This is incorrect because rodents and fungi are living organisms, making them biotic factors, not abiotic.
• "Biotic factors responsible for losses in stored grains are insects, rodents and moisture." – This is incorrect because moisture is a non-living environmental factor, which makes it an abiotic factor, not biotic.
• "Biotic factors responsible for losses in stored grains are insects, rodents and fungi." – This is correct because insects, rodents, and fungi are all living organisms (biotic components) that cause damage to stored grains.
• "Storage losses in agriculture produce can be very low." – This is generally incorrect or misleading because improper storage conditions can lead to massive losses in agricultural produce.