Choosing the right fungicide application technique

摘要

THE TARGET FOR a fungicide spray is the surface of the crop plant.A contact protectant fungicide is designed to remain on the plantI surface for protection from infection by fungal and bacterial plant pathogens. Penetrative systemic fungicides, on the other hand, are designed and developed for an ability to move into the plant as quickly as possible, thereby suppressing or eradicating an infection therein.Spray coverage is always important and most critically so for contact-action protectant fungicides because deficiencies in coverage can be rapidly exploited by plant pathogens. Once the pathogen is inside the plant "there is no way back" because the protectant fungicide remains on the plant surface.