Two new culprits cause strawberry blight

August 13, 1999

Until now, blossom blight of strawberries in California has been mostly attributed to the fungus Botrytis cinerea. However, UC scientists have discovered that more than one organism is responsible. Their investigation has revealed that a new fungus and the bacterium Xanthomonas fragariae alsocause the disease.

In the July-August issue of California Agriculture, UC Davis plant pathologist Doug Gubler and colleagues describe for the first time how the bacterium and the fungus Cladosporium cladosporioides cause blossom blight in strawberries.

Plants infected with blossom blight produce small or misshapen strawberries. In a study of infected strawberry fields in Watsonville, the scientists found that infection by the bacterium seemed to aggravate the effect of the fungus, and vice versa, but each organism was capable of causing blossom blight independently. Blossoms infected with these organisms developed symptoms distinct from each other. X. fragariae can cause occasional fruit loss, but this is considered of minor economic importance in California strawberry production fields. More significant is C. cladosporioides, which renders the fruit unattractive and therefore reduces the market value of the crop.

California grows approximately 80% of the 1,500 million to 1,600 million pounds of strawberries produced each year in the United States. Of the strawberries grown in California, more than 50% comes from the Central Coast, specifically the Salinas and Watsonville areas.

University of California - Division of Agriculture & Natural Resources

Related Bacterium Articles from Brightsurf:

Root bacterium to fight Alzheimer's
A bacterium found among the soil close to roots of ginseng plants could provide a new approach for the treatment of Alzheimer's.

Tuberculosis bacterium uses sluice to import vitamins
A transport protein that is used by the human pathogen Mycobacterium tuberculosis to import vitamin B12 turns out to be very different from other transport proteins.

Bacterium makes complex loops
A scientific team from the Biosciences and Biotechnology Institute of Aix-Marseille in Saint-Paul lez Durance, in collaboration with researchers from the Max Planck Institute of Colloids and Interfaces in Potsdam and the University of Göttingen, determined the trajectory and swimming speed of the magnetotactic bacterium Magnetococcus marinus, known to move rapidly.

Researchers show how opportunistic bacterium defeats competitors
The researchers discovered that Stenotrophomonas maltophilia uses a secretion system that produces a cocktail of toxins and injects them into other microorganisms with which it competes for space and food.

Genetic typing of a bacterium with biotechnological potential
Researchers at Kanazawa University describe in Scientific Reports the genetic typing of the bacterium Pseudomonas putida.

How the strep bacterium hides from the immune system
A bacterial pathogen that causes strep throat and other illnesses cloaks itself in fragments of red blood cells to evade detection by the host immune system, according to a study publishing December 3 in the journal Cell Reports.

The cholera bacterium can steal up to 150 genes in one go
EPFL scientists have discovered that predatory bacteria like the cholera pathogen can steal up to 150 genes in one go from their neighbors.

Exploiting green tides thanks to a marine bacterium
Ulvan is the principal component of Ulva or 'sea lettuce' which causes algal blooms (green tides).

The cholera bacterium's 3-in-1 toolkit for life in the ocean
The cholera bacterium uses a grappling hook-like appendage to take up DNA, bind to nutritious surfaces and recognize 'family' members, EPFL scientists have found.

Excellent catering: How a bacterium feeds an entire flatworm
In the sandy bottom of warm coastal waters lives Paracatenula -- a small worm that has neither mouth, nor gut.

Read More: Bacterium News and Bacterium Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to