Effects of Aqueous Extracts from Vermicomposts (teas) on Crop Growth and in Suppressing Plant Diseases, Nematodes and Arthropod Pests

Period of Performance: 01/01/2007 - 12/31/2007


Phase 2 SBIR

Recipient Firm

Oregon Soil Corporation
19712 South Southend Road
Oregon City, OR 97045
Principal Investigator
Firm POC


This Phase II SBIR project aims at confirming the potential of aqueous extracts (teas) from vermicomposts, in promoting plant growth and suppressing plant diseases, nematodes and pest arthropods. In Phase I research we demonstrated that: (i) microorganisms and plant growth regulators can pass into teas, (ii) aerated vermicompost teas performed better than non-aerated ones, (iii) soil drenches and foliar sprays of vermicompost teas suppressed a range of plant pathogens, (v) drenches of vermicompost teas suppressed the root knot nematode (Meloidogyne hapla) significantly, (vi) soil-applied vermicompost teas suppressed aphid and spider mite attacks.