Insecticides are chemical substances that kill or control pests, including insects, that can harm crops, livestock, or humans. They come in various forms, including sprays, baits, dust, and target-specific insect species.

Fungicides are chemicals used to prevent or control fungal growth and disease in crops, plants, and other organic materials. They come in various forms including sprays, dusts, and liquids, and target specific fungal species without harming desired vegetation. Fungicides play an important role in maintaining plant health and improving crop yields.

Herbicides are chemicals used to kill or control weeds and unwanted plants. They come in various forms including sprays, granules, and gels, and target specific plant species without harming desired vegetation. Herbicides are commonly used in agriculture, landscaping, and gardening.

Plant growth refers to the process by which plants increase in size, develop new structures, and mature over time. It is influenced by various factors such as light, water, temperature, nutrients, and air quality. Proper plant growth is essential for healthy plant development and is crucial in agriculture, horticulture, and gardening.

Public health refers to the science and practice of preventing disease, prolonging life, and promoting health and well-being through the organized efforts and informed choices of society, organizations, public and private, communities and individuals. Public health interventions aim to improve the health of populations and protect against health threats.