New approaches to frost control

The height of the vines influences how they fare during cold weather.

ADVERTISEMENT

  • An expensive disorder

An expensive disorder

  • February 15th, 2013

Photos courtesy of Bhaskar Bondada

A shrivel is not just a shrivel.

Of the various types of shrivel impacting grape quality, sour shrivel is especially unwanted because it renders the fruit unsuitable for winemaking.

The disorder, found in vineyards around the world, is known by several names. In California, researchers have begun [...]

  • Saving water in early peaches

Saving water in early peaches

  • February 15th, 2013

Scientists with the U.S. Department of Agriculture, looking for ways that growers can save water without affecting fruit quality or yields, see potential for using deficit irrigation on early season California peach trees. Their research includes development of a tool that can tell farmers precisely when irrigation is needed.

USDA [...]

  • Irrigate early if winter is dry

Irrigate early if winter is dry

  • February 15th, 2013

Bleeding (inset photo) caused by root pressure is associated with bud swell and bud break. Bleeding sap is collected from a potted Merlot grapevine in a Washington State University study looking at the consequences of dry soil during bud swell and bud break.

Adequate soil moisture in the spring is [...]

  • Frost protection strategies

Frost protection strategies

  • February 1st, 2013

Tree and vine crops can be won or lost because of one or two critical degrees of cold temperature, so, ultimately, the best method of frost protection is good site selection. But even the best sites won’t be perfectly freeze-free.

Is there a good way to recover those one or [...]

  • Mist cooling for freeze protection

Mist cooling for freeze protection

  • February 1st, 2013

This experimental plot at Michigan State University’s Clarksville Horticulture Experiment Station was established last year to study the Solid-Set Canopy Delivery system for spraying. Jim Flore wants to test misting as a way to slow down bud development during warm periods in late winter.
Photo by Richard Lehnert

Michigan State [...]

The five most common mistakes

  • February 1st, 2013

 for a vertical trellis

Line posts are spaced too far apart. Kuhn advises spacing line posts 32 to 35 feet apart for optimum performance; 40 feet is average, and 50 feet apart is asking for trouble.
Line posts are too small, resulting in posts tipping over. Kuhn recommends using 3- [...]

  • Wind machines

Wind machines

  • February 1st, 2013

Wind machines have been a skyline feature in orchards and vineyards in the Pacific Northwest and California for a long time, but now they’re sweeping into apple orchards in Michigan and New York at a rapid pace.

It’s not a case of locking the barn after the horse is gone. [...]

  • Enhancing biocontrol

Enhancing biocontrol

  • February 1st, 2013

Knowing when and where natural enemies, such as the green lacewing, are active is critical in order to conserve them. Large inset: Garden orb web spider in apple orchard. Small inset: Adult ladybug feeding on aphids.

This is the first article in an eight-part series highlighting results of a five-year [...]

  • Good to Know: Promalin as a frost rescue for apples

Good to Know: Promalin as a frost rescue for apples

Spraying Promalin at full bloom increased fruit set and yield. Fruit size and shape were normal at harvest, but most of the fruit were without seeds (parthenocarpic).
PHOTOS COURTESY of NORTH CAROLINA STATE UNIVERSITY

The Southeast wasn’t spared from the spring freezes that plagued much of the Midwest and eastern [...]

  • Growers try hooped trellises

Growers try hooped trellises

  • February 1st, 2013

A new apple orchard planted to a V trellis uses greenhouse technology to support the Vs.
Courtesy of Wilson Orhard & Vineyard Supply

A few tree fruit trellis systems in Washington State are sporting a new look. Instead of flat-sided steel for the V and Y arms and supports, growers [...]

  • Red-fleshed apples

Red-fleshed apples

  • January 15th, 2013

The red trait, which is common in crab apples and ornamentals, produces flesh colored anywhere from pink to deep red. Skin color and flesh color are inherited separately, so yellow apples can have red flesh.
Photos courtesy of IFORED

Next Big Thing’s last big thing was the SweeTango apple. Now, [...]

  • Auction benefits research

Auction benefits research

  • January 15th, 2013

Washington State’s wine industry will receive a big windfall this year when the Auction of Washington Wines contributes nearly $250,000 for grape and wine-related research and education.

The donation was given to Washington State University for the viticulture and enology program. About $100,000 will be dedicated to research, with the [...]