PLANTCT™ is a site specific management system, that continuously monitors the weather and crop plants, and can reduce the impact of harmful weather events on crops by helping the user to intervene in time. Used as a disease/pest warning system, the DSS helps users to determine when to apply control measures to suppress diseases and pests. The forecasting system gives predictions by using mathematical models and provides a warning message to the client about the risk level based on these models. Risk evaluations help to inform on choice in using a chemical application.