Pesticide Treadmill. Definition - What does Pesticide Treadmill mean? The term pesticide treadmill describes the phenomenon whereby pesticide use prevents any natural form of control from taking place, thereby resulting in the need for repeated, routine applications of pesticide. The pesticide treadmill is said to escalate when the control of one pest provides a window of opportunity for other pests and the need for further chemicals.
Before hitting some types of waves, let me describe the common characteristics of electromagnetic waves. Electromagnetic waves are a type of transverse waves. These waves do not require a medium to travel. As the name of the waves imply, these waves show electrical and magnetic properties.
1. A mechanical wave needs a medium for its propagation. An electromagnetic wave can travel through vacuum and it has the highest speed as it moves through the vacuum. Sound wave is a mechanical wave and light is an electromagnetic wave. 2. A mechanical wave can be both transverse and longitudinal but an electromagnetic wave is a transverse wave. 3. The particles of the medium vibrate, when a mechanical wave passes through it. In an electromagnetic wave the oscillating parameters are the electric and magnetic field.