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Phytotoxin Deficient Mutant Strains of the Biocontrol Agent Trichoderma Virens
Patent Number: 5882915
Docket Number: 9596
Serial Number: 8633334
Date Patented: 03/16/1999
Agency:
Agricultural Research Service
Date Issued:
March 16, 1999
Abstract:
The invention uses stable mutated strains of a Trichoderma virus for biological control of fungal diseases in plants.
Naturally-occurring strains of Trichoderma virens (T. virens) are mutated to produce strains that are deficient in their
ability to produce viridiol, a phytotoxin which is toxic to plants, and remains an effective biological control. Mutated T.
virens are cultured and screened so that strains deficient in the ability to produce viridiol are selected and can be used as
a spray for plants or seedlings, a seed coating, and a soil treatment. The invention is particularly effective for
controlling soilborne root or seedling diseases.
Inventors:
| Charles R. Howell |
| Southern Crops Research |
| College Station, TX 77845 |
| (409) 260-9232 / fax: (409) 260-9470 |
Industry Keywords:
environment, pesticide, biological control, gliocladium virens, antibiotic-producing antagonist, plant pathogens,
Trichoderma virens, fungicide, fungus, biocontrol, plant disease, seed, cotton, soybeans, beans, citrus, apples, zinnia,
biotechnology
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