What is an indication of a plant injured by nematodes?

A stunted, unthrifty appearance is a clear indication of plant injury caused by nematodes. These microscopic worms can damage plant roots, leading to impaired nutrient and water uptake. As a result, affected plants often exhibit reduced growth, poor vigor, and an unhealthy overall look. Stunted growth is particularly characteristic because the plant struggles to develop normally when its root system is compromised by nematode feeding, which can cause lesions or root galls.

The other options suggest conditions that are typically not associated with nematode injury. Bright green leaves typically indicate healthy plants that are well-nourished, while rapid growth suggests that a plant is thriving rather than suffering from pests or diseases. Colorful flowers might indicate a plant is in good health and able to allocate resources to reproduction. Therefore, when observing a plant with a stunted and unhealthy appearance, it is essential to consider nematode infestation as a potential cause.