Plant diseases are any abnormal growth in the plant in any part of it that can modify the regular functions of the plant. Plant diseases are a regular part of nature that unless we genetically modify our plants or spray them, which can make it worse, we just have to grow them in a good environment and deal with the disease if it comes. Plant diseases keep all plants and animals (including us) in balance. Plant diseases are one of the many risks that plants take when we grab them out of their original habitat and grow them in our own different conditions that may work for us but not so much for the plants. These plants that we remove from their normal habitats are much more susceptible to plant diseases that most other plants are a little more prepared. Then again plants out in nature take the risk of being the host to more than one pathogen. A plant that has been invaded already by one pathogen is much more susceptible to second pathogens. There are five main stages to a plant disease. The first There are two types of plant diseases and those are the infectious and the noninfectious. The infectious plant diseases are carried and caused by a pathogenic organism such as a virus, bacteria, or fungus. The infectious agent is able to reproduce while using its host while spreading into other parts of the plant as well as to other separate plants through the roots system. A non-infectious plant disease is usually caused by harsh growing conditions such as very high or very low temperatures, uneven relationships with the moisture and the air, toxic substances, or too much or too little of a mineral in the soil. Since this type of plant disease is just caused by rough conditions and has no actual form it can reproduce to other plants.For us as humans our crops are vital to us so when a disease hits our crops we want to be ready to know what it is and to catch it early so that if it’s an infected with a pathogen that could potentially spread to other plants we would want to get rid of the plants it’s already infected so that we can at least save some of the crops. The names of the plant disease are usually based on their common symptoms shown on the plant. Some of the most common types of plant diseases are blight, wilt, rot, rust mildew, and cankers.Blight- A plant infection that’s caused by a pathogenic or infectious organism. The plant will show browning in the leaves, or chlorosis. Chlorosis is when leaves begin to yellow due to the loss of chlorophyll, the green pigment that makes most plants leaves that bright green. After the plant tissues die the browning areas die off. These parts are the leaves, stems, and sometimes even whole branches. Types:Alternaria Blight- Also called early blight, this affects vegetables, fruit trees, and shade trees everywhere. Dark black spots begin to appear on the lower areas of the plant and spreading upward as time goes on. The spores are carried by the wind and causes dust to be everywhere in the air.Phytophthora Blight- Also called late blight, it’s a similar fungal infection to Alternaria blight. As well as affecting vegetables and trees, this infection infects flowers as well such as rhododendrons, holly, and azaleas. In the flowers it causes stem cankers and the dieback of the shoots. In vegetables, like potatoes and tomatoes, the first symptoms are the under leaves have water-soaked spots. These will grow and have similar white look-alikes on the underside. Dark blotches can appear on the stem of the plant and if a rainy season comes the plant will rot and die off.Wilt- A common disease that happens in flowers and leaves when the plant leaves lay limp and easily can be torn. This is caused by a plant no getting enough water or being left out in the sun with no hydration or very little. When bacteria or fungi get into the xylem it can result in wilting that can’t be fixed by any amount of watering. This can lead to the death of the plant if not cared for right away.Types:Stewart’s Wilt- This is a bacterial disease that affects sweet corn in the US.