Biotic stress is stress that occurs as a result of damage done to plants by other living organisms, such as bacteria, viruses, fungi, parasites, beneficial and harmful insects, weeds, and cultivated or native plants. Not to be confused with abiotic stress, which is the negative impact of non-living factors on the organisms in a specific environment such as sunlight, wind, salinity, over watering and drought. The types of biotic stresses imposed on a plant depend on both geography and climate and on the host plant and its ability to resist particular stresses. Although there are many kinds of biotic stress, the majority of plant diseases are caused by fungi. Biotic stress remains a broadly defined term and those who study it face many challenges, such as the greater difficulty in controllin