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Most plant diseases are caused by fungi, bacteria, and viruses. Although the term disease is usually used only for the destruction of live plants, the action of dry rot and the rotting of harvested crops in storage or transport is similar to the rots of growing plants; both are caused by bacteria and fungi.
Once one of your plants is infected by a fungus, it is important that you protect your other plants from the fungal infection. Plant diseases that are caused by fungi reduce the crops, create markings, affect the flowers and fruits, finally causing death of the plant.Majority of the plant diseases, about 8,000, are caused by fungi. Let's have a look at the major ones below.Along with fungi, even bacteria and viruses affect plants. At the same time, some plant diseases are caused by adverse environmental and climatic conditions.There are some plants that have a natural resistance to certain diseases, especially if these diseases and the plants have evolved together.t affects the growth and strength of the plant. Damping Off-This is a disease that infects the seedling of the plant, caused by different fungi -- Pythium and Phytophthora being some of them. It infects the seed and decays it, thus affecting the growth and vigor of the whole plant.