Job offersmore »
- Buitendienst Medewerker - Oost Nederland
- Managing Grower - Australia
- Senior Grower - Talbotville, Ontario, Canada
- Operations Manager - Fresh Produce
- Senior Account Manager Retail - Netherlands
- Supply Allocation and Inventory Manager - Fresh Produce, Italy
- Senior Grower - Katunga, Australia
- Key Account Manager - Netherlands
- Accountmanager aardappelinkoop BelgiŽ / Frankrijk
- International Retail Manager - Netherlands
Last commentsmore »
- India: Government gives 50% subsidy on a poly house (957)
- UK: What's in season at the New Covent Garden Flower Market (4)
- Will sea freight be an alternative to Latin American air freight? (27)
- US: AFE educational grant applications due June 1 (4)
- Women's Day: "Russian market is growing up" (2)
- Danish greens grower expands with first own bred peperomias (1)
- Export stop Australia as of March 1 2018 (1)
- Colombia, Kenya and China: What's their recipe for success? (1)
- "Proven Winners is just getting started" (1)
- Market reports: solid research or wild guesses? (4)
Top 5 - yesterday
Top 5 - last week
Top 5 - last month
Exchange ratesmore »
US: "Good-guy" fungus to take on killer of oaks and ornamental cropsA beneficial soil fungus could offer a biobased approach to battling Phytophthora ramorum, a pathogen that kills oaks, other tree species and woody ornamentals.
BioWorks, Inc. of Victor, New York, is collaborating with Agricultural Research Service (ARS) plant pathologist Tim Widmer to commercially formulate the fungus, Trichoderma asperellum. The species is a mycoparasite, meaning it attacks and kills other fungi, including P. ramorum, a fungus-like pathogen, notes Widmer, with ARS in Fort Detrick, Maryland.
Phytophthora ramorum (see large circle) can fell mighty oaks and sicken woody ornamental crops. But itís no match against Trichoderma asperellum, a beneficial fungus (see strands) that infects and kills the pathogen. (Photo by Tim Widmer)
P. ramorum is best known as the culprit behind Sudden Oak Death, a disease of oak and other hardwood trees in coastal forests of California and Oregon. Nursery growers are familiar with a different manifestation of the pathogen called "Ramorum Blight." This disease afflicts rhododendron, viburnum, camellia and other woody ornamental plants.
Chemical fumigation and soil sterilization are two common methods of keeping nursery stock blight-freeóand compliant with federal and state quarantine regulations meant to prevent the pathogen's spread. However, T. asperellum could offer a biobased alternative to such soil treatments, which are many times costly, dangerous to use and harmful to beneficial soil organisms.
In petri-dish experiments and outdoor trials with potting mix, use of the biocontrol fungus reduced P. ramorum levels by 60 to 100 percent. A chemical fungicide achieved similar results, but only temporarily: eight weeks later, the pathogen reemerged in the potting mix. Widmer suspects the fungicide temporarily halted the growth of the pathogen, but didn't kill it.
The biocontrol fungus uses a specialized tactic for breaching the defenses of P. ramorum, which it enters to feed, germinate and start the cycle all over again until little or no pathogen remains in the soil.
BioWorks and Widmer aim to capitalize on this "talent" by formulating the fungus into a wettable powder that can be added to nursery soils and potting mixes.
Read more about this research in the August 2017 issue of AgResearch.
Publication date: 8/11/2017
Other news in this sector:
Leave a comment: (max. 500 characters)
- All comments which are not related to the article contents will be removed.
- All comments with non-related commercial content, will be removed.
- All comments with offensive language, will be removed.