1. Overall senescence: This kind of senescence occurs in annual plants when entire plant gets affected and dies.
Example: Wheat and Soybean. It also occurs in few perennials also.
Example: Agave and Bamboo.
2. Top senescence: It occurs in aerial parts of plants. It is common in perennials, underground and root system remains viable.
Example: Banana and Gladiolus.
3. Deciduous senescence: It is common in deciduous plants and occurs only in leaves of plants, bulk of the stem and root system remains alive.
Example: Elm and Maple.
4. Progressive senescence: This kind of senescence is gradual. First it occurs in old leaves followed by new leaves then stem and finally root system. It is common in annuals.
