Becker Underwood - an international firm that has its UK base in Littlehampton, West Sussex - plans to release the nematode-based product in time for winter.
Karl Geary, a representative for the firm, told top fruit growers at the British Independent Fruit Growers' Association AGM last week that the biopesticide targets the moth's overwintering larvae.
It is sprayed onto wet tree trunks, branches and soil, where the nematodes enter the larvae and release bacteria that kill them.
Geary said: "This strategy has been proven to dramatically reduce pest numbers in the following year offering excellent levels of control of the codling population before the first flight and the first damage." The product can be used as part of growers' integrated pest management programmes.