A susceptible plant, a causal agent, and a favorable environment occurring over a period of time must be present for a disease to occur. Cultivation Use of fungicides Integrated plant health management involves knowing a plant's cultural characteristics, selecting a plant adapted to the area, planting properly in the right location, pruning, fertilization and watering, regularly monitoring for any plant problems during the growing season, and taking action to solve the problem when it occurs with the available cultural or biological practices, with the last option being fungicide use. Chemical fungicides, if applied, must be used according to the label directions . The fungicide needs to cover the plant thoroughly, both upper and lower leaves and stems. Fungicides, therefore, are best applied with a compressed air sprayer.
Most fungicides are protectants and are used before the disease-causing agent arrives.
Fungicides are applied on a five to seven day schedule, depending upon environmental conditions. Banner or Immunex or propiconazole Bayleton or triadimefon Cleary's 3336 Funginex or triforine Subdue or metalaxyl Chipco 26019 or iprodione Biological fungicides are microorganisms that compete with or destroy disease-causing agents. An example is the fungus, Gliocladium virens . This beneficial fungus can be added to the soil to protect seeds or plants against fungal disease-causing agents that cause stem or root rot.