What is one impact insects can have on stored grain?

Insects can significantly impact stored grain, and one notable effect is their ability to reduce germination. When insects infest grain, they can damage the seeds or alter the conditions within the storage environment, which affects the seeds' viability. For instance, feeding on the grain can lead to physical damage of the seeds, making them less likely to sprout when planted. Furthermore, insects can introduce moisture or mold through their excrement or by creating conditions conducive to decay, further diminishing the germination potential of the affected grain. This reduction in germination is particularly detrimental for farmers and producers who rely on high-quality grain for planting.

The other options, such as increasing grain weight or enhancing nutritional value, do not apply because insect infestations typically lead to weight loss due to feeding and deterioration. Similarly, while grain quality may sometimes be perceived as improved due to specific processing, in the case of insect infestation, the overall quality is usually compromised, not improved.