Blight-resistant refers to the ability of certain plants, particularly crops like potatoes and tomatoes, to withstand or repel diseases known as blight. Blight is a fungal or bacterial infection that can cause significant damage to plants, leading to reduced yields and economic losses. Breeding or genetically modifying plants to be blight-resistant helps ensure healthier crops and food security. Farmers often seek blight-resistant varieties to minimize the need for chemical treatments, which can be harmful to the environment. By using these resistant plants, they can maintain productivity while reducing the risk of disease spread, ultimately benefiting both the ecosystem and agricultural sustainability.