Flexible diffuse-reflective smart chamber for effective target dosing of complex plant surfaces and methods of use thereof

A device for reducing or preventing a pest or pathogen infestation on a plant or plant part, the device comprising an array frame having a top surface and a bottom surface, one or more light sources affixed to the array frame proximate to the bottom surface of the array frame, a first diffuse reflective material, and one or more flexible or semi-flexible reflectors having an inner surface and an outer surface, wherein each reflector is affixed to the array frame, wherein:

• a) the first diffuse reflective material is disposed on the bottom surface of the array frame and positioned between the bottom surface of the array frame and each of the one or more light sources;
• b) the one or more light sources are configured to emit light having a spectral wavelength in the range from about 100 nm to about 280 nm;
• c) each of the one or more reflectors comprise a second diffuse reflective material on at least the inner surface;
• and
• d) the bottom surface of the array frame and inner surface of each of the one or more reflectors form an irradiance chamber configured for diffuse reflection of light and that is open on at least one end for receiving one or more plants or plant parts;
• wherein light emitted from the one or more light sources is diffusely reflected by the irradiance chamber and contacts the one or more plants or plant parts to reduce or prevent a pest or pathogen infestation on the one or more plants or plant parts.