Metalaxyl solution is widely used as a systemic fungicide in agriculture to control diseases caused by oomycetes, such as Phytophthora and Pythium species. It is applied to crops like potatoes, tomatoes, grapes, and tobacco to prevent and treat infections like late blight, downy mildew, and root rot. The solution is often used as a seed treatment, soil drench, or foliar spray, providing long-lasting protection by inhibiting fungal growth. Its systemic action allows it to be absorbed by plants and distributed throughout their tissues, ensuring effective disease management. Additionally, it is used in combination with other fungicides to enhance its efficacy and reduce the risk of resistance development.