Quick reference of dosage rates for predator insects:


Indoor nematodes - Steinernema feltiae - sold in 5M and 50M size packages.    

Your goal is to treat each 1 gallon of soil with 25,000 nematodes.
Assuming you have mixed the 5 Million packet in 2L of tepid water:

Size of pot        Dose per pot                   Doses per 5M or (50M) pack
1gal                    10ml =2 tsp                                        200        (2000)
5 gal                   50ml = 1/4 cup                                  40           (400)
10 gal                 100ml = 1/2 cup                               20            (200)
15 gal                 150 ml = 3/4 cup                              14            (140)
20 gal                 200 ml = 1 cup                                  10            (100)


If you purchase the 50M pack you can divide into 10 equal parts (5M each) and dilute each part into 2L tepid water to use the same calculations as above. 

Full instructions and dilution rates are included on each package.