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United States Department of Agriculture

Agricultural Research Service

Grower Resources
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Recent Publications:

     
 Effect of Mustard Seed Meal on Early Weed Emergence in Peppermint and Potato   Sustainable PNW  
 DDGs--Ethanol Byproduct Fights Weeds, Boosts Crop Yields  ARS Magazine  
 One Hardy Bean - New pinto produces top yields even under high stress  AVG Magazine  
 Alternatives to Burning and Their Effects on Insect, Weed, and Disease Pests in Alfalfa Seed Fields   WSU and ARS Report  
 Integrated Weed Management in Mint   Mint Drops  
 Powdery Scab   Potato Country  
 Tuberworm Outlook   Potato Country  
 Switchgrass Production in Washington   Sustainable PNW  
     
     

Carrot Country

 Volunteer potatoes pose a threat to carrot yield and are expensive and difficult to control in carrots due to the lack of effective herbicides labeled for use in carrots.  We have determined the effect of volunteer potato plant density on carrot yield and quantified how much yield is lost with various times of removal.  We have also determined volunteer potato and carrot response to two new herbicides that help suppress volunteer potato in carrots.  These results provide growers with new information and tools to help suppress volunteer potatoes that will minimize crop losses and reduce hand weeding costs.

Full Article: New Tools for Managing Volunteer Potatoes in Carrot Production- 3-1-07 (PDF)

carrots 

Potato Progress

 The ability to rapidly and accurately identify pathogens that cause plant diseases can greatly reduce losses and costs for disease management. Unfortunately, many pathogens responsible for plant diseases, including fungi, bacteria, and viruses cannot rapidly be identified using historically applied techniques of microbiology and the use of microscopes. We have developed DNA detection assays for several diseases of potatoes. These molecular tools provide growers with critical information for timing control measures, correctly selecting disease resistant varieties, and meeting phytosanitary requirements.

Full article: Advances and Challenges in Developing Molecular Tools to Detect and Diagnose Potato Diseases  - 9-28-06 (PDF file)

 

 Powdery scab is among the most damaging emerging potato pathogens in the world. No soil or plant treatment has an economically beneficial effect on the level of damage caused by it.  Economic loss occurs when skin pitting or when yield loss is caused by suppression of full root development through powdery scab's attacks on the roots.  Resistance to the fungus that spreads powdery scab could be very beneficial to the profitability of the potato crop.  This article examines research done from 2003 to present on resistant potato gemplasm.

Full article: Resistance to Powdery Scab in Potato- 9-28-06 (PDF File)

  

 The Columbia Basin potato purple top phytoplasma is a bacteria-like agent transmitted to potatoes by the beet leafhopper.  The disease is called purple top because of the characteristic purple coloration produced on infected potato plants.  We have found that all of the major potato varieties grown in the Columbia Basin are susceptible to the disease.  Additionally, we have found that the tubers produced on infected plants are frequently infected with the phytoplasma and that these infected tubers can produce infected daughter plants.  These findings have implications for control of the disease and stress the importance of using seed tubers free of the pathogen.

Full article: Tuber Transmission of "Purple Top" Phytoplasma - 9-28-06 (PDF File)

 

 

 


Volunteer Potato Control Info

Last Modified: 2/22/2012