Research tackles decay issue

A new project will focus on controlling decay and finding pollinizers that are not disease hosts.

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  • Clean plant material fundamental

Clean plant material fundamental

  • February 1st, 2011

The young vines in grow tubes are replants due to disease-contaminated plant material.

When Tedd Wildman began planting lesser-known red wine grape varieties on Washington State’s Wahluke Slope ten years ago, he was careful to source plant ­material from certified nurseries. But not careful enough.

At the time, certified plant material [...]

  • Small orchards, but big impact

Small orchards, but big impact

  • January 15th, 2011

South Tyrol extension advisor Bernhard Botzner shows the concrete poles used for trellis supports.

Published January 15, 2011
Don’t let the small size fool you. Individual apple orchards near Merano, in Italy’s Vinschgau Valley, may only be a few acres in size, but the valley has trees planted wall to [...]

Italian extension service is well funded

  • January 15th, 2011

Published January 15, 2011
The South Tyrol Advisory Service performs many of the same services that Cooperative Extension does in the United States—educating growers about integrated pest management, irrigation, fertility, and nutrition. The biggest difference is funding.

The budgets of Cooperative Extension in the United States are often squeezed when [...]

  • Electric vehicle has power

Electric vehicle has power

  • December 1st, 2010

Karen Lewis and Gwen Hoheisel (standing) demonstrate how an electric utility vehicle can be used for herbicide spraying with the WeedSeeker technology.

Karen Lewis and Gwen Hoheisel, Washington State University Extension educators, say an electric all-terrain vehicle that they’re evaluating has met or exceeded all their expectations in research plots.

The [...]

  • Tree IVs?

Tree IVs?

  • December 1st, 2010

This injector was tested with apple trees.

Might the airblast sprayer in the future be replaced by IV tubes jabbed in fruit trees?

Michigan State University entomologist Dr. John Wise decided to see if he could control apple insects by injecting insecticides into the tree trunk—much as landscapers now do with [...]

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 [...]

  • Low-volume prestorage drenching is attractive

Low-volume prestorage drenching is attractive

  • October 1st, 2010

Dave Rosenberger described how he tested the effectiveness of low-volume nonrecycling drenches for fruit going into storage. His audience included New York fruit growers and International Fruit Tree Association members on tour during the fruit field day at Cornell Agricultural Research Station at Geneva, New York.

The practice of drenching [...]

  • 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 [...]

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 [...]

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 [...]