Cockroaches can survive on any food source that is nearby, including hair, sewage or sweets and are known for spreading diseases such as Salmonella, Dysentery & Gastro-enteritis. Cockroaches have been on the plant for over 300 million years explaining why they are so adaptive to their surroundings. They tend to thrive in warm and moist climates, usually more active during night hours than day. From the 4,500 species of cockroaches around the world – you only need to worry about three invading your business and home.