A device control system has a terminal 3 with a web browser 31, and a printer 5 that controls a connected device. The upper compartment contains a first beverage ingredient, such as powdered milk, and the lower compartment 8 contains a second beverage ingredient, such as instant coffee. The compositions find use in methods for reducing or eliminating damage to plants caused by plant pathogens. Optimum classifiers possess a minimum distance from a speaker model.