Blight
Blight is a rapid and complete chlorosis, browning, then death of plant tissues such as leaves, branches, twigs, or floral organs. Accordingly, many diseases that primarily exhibit this symptom are called blights. Several notable examples are:
Monilinia laxa
Throughout the entire world, brown rot is arguably the most common reason for crop loss of stone fruits both before and after harvest, especially in regions with warmer temperatures and wet climates. This disease has actually been shown to have a variety of incidence from year to year due to environmental variation. Before the discovery of extremely effective fungicides, when fruit ripened during a period of high rainfall, there were significant losses due to Brown rot blossom blight. After centuries of studying this disease in both Europe and North America, the use of fungicides have more recently become effective. Demethylation inhibitor (DMI) fungicides and Benzimidazole (BZI) fungicides are both examples are common fungicides that have been used to treat brown rot. However, since the beginning of these fungicides, another set of problems arose. After time, brown rot has become resistant to a few fungicides including both DMI and BZI. Luckily, scientists have been able to develop strategies for managing or delaying fungicide resistance to Brown rot blossom blight.