Illinois Pesticide Applicator Practice Exam 2025 – Complete Right-Of-Way Study Guide

Garlic mustard is classified as an annual weed because it typically completes its life cycle within one growing season. This means it germinates, grows, reproduces, and dies all within the span of one year. Annual weeds are defined by their rapid life cycle, which allows them to thrive in disturbed areas and compete with other plants.

In contrast, dandelion and Canada thistle are examples of perennial weeds, meaning they live for multiple seasons and can return year after year from established root systems. Similarly, Johnsongrass, being a perennial grass, can survive through various seasons and backdrop environmental challenges. Understanding the life cycles of these plants is crucial for effective weed management strategies in right-of-way applications and other settings.