Brown rot surprises cherry growers

Tart cherry growers need to watch out for European brown rot as bloom arrives.

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Mysterious ailment strikes

  • October 1st, 2010

A mysterious disease that has been killing the best looking, reddest strains of McIntosh apples in the nicest orchards in the northwest quadrant of Michigan has tentatively been identified, and growers now have some idea what to do about it.

“We’re not quite there yet,” said Dr. George Sundin, the [...]

  • Is drosophila a Washington State resident?

Is drosophila a Washington State resident?

  • October 1st, 2010

Entomologists in the Pacific Northwest intend to find out how well the spotted wing drosophila can survive the region’s cold winters.

The pest, a native of Asia, was first seen in ­California in 2008. It was found in Oregon and British Columbia in 2009, and turned up in eastern ­Washington [...]

Managing new pests

  • September 1st, 2010

Pacific Northwest growers are vigilant following reports of spotted wing drosophila among Concord grapes in eastern Washington and the early appearance of the flies in traps in British Columbia’s Okanagan Valley in Canada.

While the susceptibility of wine grapes is not known, table grape and stone fruit ­growers fear the [...]

  • Use glyphosate  with caution

Use glyphosate with caution

  • September 1st, 2010

This stunted apple tree, which has a large basal canker, is in an orchard where the grower used glyphosate alone three to four times a year to control weeds. Cuts on the margin of the canker show healthy green tissue.

Growers often express concern that a herbicide program using glyphosate [...]

  • Symptoms of glyphosate damage

Symptoms of glyphosate damage

  • September 1st, 2010

Young trees can show injury after glyphosate application the previous year. One symptom of glyphosate damage is small spindly leaves that look like zinc deficiency. Shoot tips die so you get clustered growth.

Micronutrient (and often some macronutrient) deficiency
Low vigor, slow growth, stunting
Leaf chlorosis (yellowing), complete or between [...]

Antibiotic on organic sunset list

  • July 1st, 2010

Organic tree fruit growers in the Pacific Northwest are concerned that the National Organic Standards Board might drop its approval of the antibiotic Mycoshield (oxytetracycline or tetracycline) for organic production in 2012. The product is used to manage fireblight in apples and pears.

The NOSB has a list of more [...]

  • NW questions cherry fruit fly quarantine

NW questions cherry fruit fly quarantine

  • June 1st, 2010

The western cherry fruit fly has not been found in California’s cherry-growing districts.

State officials in Oregon and Washington say ­California’s quarantine requirements for the Western cherry fruit fly are unjustified.

Helmuth Rogg, supervisor of the Oregon State Department of Agriculture’s Insect Pest Prevention and Management Program, said California has imposed [...]

Quarantine alternative

  • June 1st, 2010

Dr. Wee Yee, entomologist with the U.S. Department of Agriculture in Yakima, Washington, is conducting research to assess the likelihood of cherry fruit fly becoming established in certain overseas markets that are concerned about potential infestations of the pest, such as Indonesia and Thailand. Dr. Lisa Neven is cooperating [...]

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  • June 1st, 2010

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  • May 15th, 2010

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  • Preventing pear rot

Preventing pear rot

  • May 15th, 2010

Dr. David Sugar, plant pathologist at Oregon State University, says the nitrogen and calcium levels in the orchard can affect the potential for decay in pears after harvest.

Orchard management can play an important role in ­minimizing postharvest decay in pears, says Dr. David Sugar, pathologist with Oregon State University [...]

  • Moth poses little risk in Taiwan

Moth poses little risk in Taiwan

  • May 15th, 2010

Dr. Lisa Neven is studying the survival of codling moth larvae in tropical conditions.

There is little risk of codling moth larvae shipped in apples to Taiwan resulting in the pest becoming established in that country, research by Dr. Lisa Neven, insect physiologist at the U.S. Department of Agriculture’s research [...]