Allelopathy is generally known as the direct and indirect effects of chemical compounds that are released into the environment from plants and have inhibitory or stimulating effects. These compounds are known as Allelochemical, which are natural products, are also known as phytogrowth-inhibitors and are a major factor in organizing the plant community. These compounds have multiple effects on physiological activities as well as their phenotypic effects on plant germination and growth. It also affects the main metabolic processes in it, such as photosynthesis and respiration, protein building, hormone building and balance, plant pigmentation, the activity of some enzymes and cell division.