The product label for Agri-Mycin 17 also gives instructions for foliar weekly spraying as an alternative to soaking.
Agri-Mycin 17 contains streptomycin sulfate 22.4% applied in Commercial & Residential: Gardens, Greenhouses, Landscapes. For leaf rust or soft rot to orchids, it is applied as directed at 8-16 oz per 100 gallons of water(equivalent 100-200 ppm).
Agri-Mycin 17 is applied to pears for fire blight as a foliar application. Please refer to page 4 of the product label for full instructions on this application.
This can happen to the Agri-Mycin 17 over time. If it was stored in a sealed container and was not exposed to moisture, it should still be fine to use.