Chlorosis and Necrosis are both plant disorders that can be caused by various factors such as nutrient deficiencies, diseases, and environmental stress. Here are some tricks to remember the differences between these two disorders:

Chlorosis:

Chlorosis is a condition in which the leaves of a plant turn yellow due to a lack of chlorophyll. Chlorophyll is a pigment that gives plants their green color and is essential for photosynthesis. Chlorosis can be caused by several factors, including:

- Iron deficiency: Iron is necessary for the synthesis of chlorophyll, and a lack of iron can lead to chlorosis.
- Nitrogen deficiency: Nitrogen is also essential for chlorophyll synthesis, and a lack of nitrogen can cause the leaves to turn yellow.
- Poor soil drainage: If the soil is too wet, it can prevent the roots from absorbing nutrients properly, leading to chlorosis.
- pH imbalance: If the soil pH is too high or too low, it can affect the availability of nutrients to the plant.

To remember Chlorosis, think of the following:

- C for Chlorophyll: Chlorosis is characterized by a lack of chlorophyll.
- Yellowing: The leaves of the plant turn yellow.

Necrosis:

Necrosis is a condition in which the plant tissues die due to injury or disease. It can affect various parts of the plant, including the leaves, stems, and roots. Necrosis can be caused by several factors, including:

- Fungal or bacterial infections: These can cause the plant tissues to die, leading to necrosis.
- Insect or animal damage: When insects or animals feed on the plant, they can cause physical damage that can lead to necrosis.
- Environmental stress: Extreme temperatures, drought, or exposure to chemicals can cause the plant tissues to die.

To remember Necrosis, think of the following:

- N for Necrosis: Necrosis is characterized by dead plant tissues.
- Browning: The affected plant tissues turn brown or black.

In summary, Chlorosis is a condition in which the leaves of a plant turn yellow due to a lack of chlorophyll, while Necrosis is a condition in which the plant tissues die due to injury or disease. Remember Chlorosis with the letter C for Chlorophyll and yellowing, and Necrosis with the letter N for Necrosis and browning.