Brown rot surprises cherry growers

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

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  • Ontario faces challenges to plum pox virus eradication

Ontario faces challenges to plum pox virus eradication

  • April 1st, 2010

Symptoms of plum pox virus include chlorotic (yellow) rings on the leaf surface or chlorotic blotches and vein clearing.

A concentrated growing area is complicating efforts to eliminate plum pox virus from the main peach-growing region in Ontario, Canada.

The virus was expected to be eliminated in the provinceCanada’s biggest peach [...]

Good to know – Rayapati

  • February 15th, 2010

Grapevine fanleaf, an infectious degenerative disease, is the oldest known viral disease of grapevines. It is believed that fanleaf virus originated from ancient Persia and spread to other grape-growing regions via transport of vegetative propagative materials. Consequently, the disease has become established as one the most serious and devastating [...]

  • Storing organic apples is not easy

Storing organic apples is not easy

  • February 15th, 2010

As Washington growers have ramped up production of organic apples, the volume of apples going into storage has also increased, and with it, the need to for longer storage. With few postharvest tools available for organic fruit, more research is needed to find ways to improve organic fruit storage, [...]

  • Controlling mildew in organic cherries

Controlling mildew in organic cherries

  • February 15th, 2010

Powdery mildew is a tough disease to control for Pacific Northwest cherry growers, but it’s even tougher for organic growers who have limited fungicides to use. With so few organic tools available, an integrated approach is needed, says a Washington State crop consultant.

Understanding the life cycle of cherry powdery [...]

  • Fireblight without antibiotics

Fireblight without antibiotics

  • February 15th, 2010

Orchards that have secondary bloom or have later-blooming varieties are more at risk for fireblight infection.

Controlling fireblight without antibiotics is doable, but it requires an integrated approach combining delayed dormant copper sprays with frequent applications of biological agents, says a plant pathologist from Oregon State University.

The antibiotics streptomycin and [...]

  • Scab control more challenging

Scab control more challenging

  • February 15th, 2010

Apple scab overwinters in infected leaves on the orchard floor. Spores from the dead leaves are produced in the spring and can cause primary infection of fruit.

The Michigan growing season was wet last year. As a result, apple growers had a tougher-than-usual time controlling scab. But the weather was [...]

  • Research viewpoint

Research viewpoint

  • December 1st, 2009

Soft fruit breeder Ralph Scorza and colleagues developed this pitless plum.

Continuing budget constraints at U.S. universities will result in fewer scientists and less research for growers to draw upon, predicts Larry Gut, entomologist at Michigan State University.

“People are being laid off and let go,” Gut said. “I’m afraid it [...]

  • Field sorting could bring a bonus

Field sorting could bring a bonus

  • December 1st, 2009

The recently planted WSU research orchard will allow study of planting designs for the future.

One of the new technologies Washington State University entomologist Dr. Jay Brunner expects and hopes to see in the next decade is automated sorting of fruit in the field. Apart from reducing a grower’s costs [...]

  • Allow parasites to control leafhopper

Allow parasites to control leafhopper

  • December 1st, 2009

A decade ago, the western grape leafhopper was known to exist in British Columbia only on the east side of the Okanagan Valley, from Penticton south to the Canada-U.S. border. Today, reports of the pest are coming from the west side of the valley and north of Penticton, highlighting [...]

  • Cultivating beneficials

Cultivating beneficials

  • December 1st, 2009

Mike Omeg checks for beneficial insects in goldenrod plants in an insectary alongside a Regina cherry block. He’s watched by (from left) Drew Merritt and Kristin Currin of Humble Roots Farm & Nursery at Mosier, Oregon, and Gwendolyn Ellen of Oregon State

Oregon cherry grower Mike Omeg is worried about [...]

Cover crops and pest control

  • December 1st, 2009

Does attracting natural enemies to an orchard by planting a cover crop translate to better biological control of pests in the trees? Dr. David Horton, entomologist with the U.S. Department of Agriculture in Yakima, Washington, hopes to find out.

Horton is conducting trials in a research orchard and three commercial [...]

Air quality study shows low pesticide risk

  • November 1st, 2009

A study that measured agricultural chemicals in the air near Washington State orchards did not find pesticides at levels considered harmful.

The $530,000 study, conducted by the Washington State Department of Health in 2008 in the Yakima Valley and in north central Washington, was designed to find out if off-target [...]