Brown rot surprises cherry growers

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

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Stinkbug watch

  • April 1st, 2012

Entomologists in New York State developed a clever way of keeping an eye out for inroads by the brown marmorated stinkbug. It’s been found across the state. So far, however, numbers have stayed small, and, as far as is known, no fruit growers have needed to spray to suppress [...]

  • Leafroller challenges cherry growers

Leafroller challenges cherry growers

  • April 1st, 2012

Obliquebanded leafroller larva
Ontario Ministry of Agriculture

Tart cherry growers need to use a modern, effective insecticide to control obliquebanded leafroller about two weeks before ­harvest—or risk delivering a contaminated crop that may be rejected by the processor.

That’s the advice of Dr. Nikki Rothwell, the entomologist who coordinates activities at [...]

  • New York apple growers on alert for strep-resistant fireblight

New York apple growers on alert for strep-resistant fireblight

  • April 1st, 2012

Dead terminal shoots on apple trees caused by infection by fireblight bacteria.
COURTESY OF KERIK COX

Apple growers in New York State were not granted the Section 18 emergency use permit they requested from the U.S. Environmental Protection Agency. That would have allowed them to use the antibiotic kasugamycin (Kasumin) [...]

  • Clinic can diagnose crop ailments

Clinic can diagnose crop ailments

  • April 1st, 2012

Karen Ward runs WSU’s Plant Pest Diagnostic Clinic.

If you find strange rots or spots on your fruit trees or some mysterious ailment, Washington State University’s Plant Pest Diagnostic Clinic is ready to help out.

Karen Ward, clinic coordinator, accepts plant samples for diagnosis of diseases and disorders. The clinic, based [...]

Pests sneak into U.K.

  • April 1st, 2012

Two new pests—the brown marmorated stinkbug and spotted wing drosophila—have snuck into the United Kingdom but are not yet established there.

Two adult brown marmorated stinkbugs were intercepted at a U.K. airport in 2010 in passenger luggage on a flight from the United States, according to a report in the [...]

  • Organic control for flea weevil

Organic control for flea weevil

  • March 15th, 2012

Damage by apple flea weevil.
Matt Grieshop­­­

Organic apple growers in the Midwest appear to have a relatively simple solution to their problems with apple flea weevil, which appeared suddenly as a problem in Michigan two years ago and took out 90 percent of the fruit in some orchards.

The best [...]

Reduced risk?

  • March 1st, 2012

A three-year study just completed in Michigan apple orchards showed that reduced-risk pesticides—which growers are now adopting—are more damaging to the functional ecology of the orchards than the products they are replacing.

Orchards using these reduced-risk pesticides have fewer beneficial organisms to help control pests, so growers will likely incur [...]

  • Stinkbug poses BIG THREAT

Stinkbug poses BIG THREAT

  • March 1st, 2012

The dreaded brown marmorated stinkbug is gradually making its way towards major tree fruit and grape growing regions in ­Oregon and Washington where $4 billion in crops are at risk.

This stinkbug species, which originated in Asia, is much larger than native stinkbugs and can be far more damaging. It [...]

  • Stinkbugs found in sweet cherries

Stinkbugs found in sweet cherries

  • March 1st, 2012

Stinkbugs are likely to move into cherry orchards by mid- to late July.
Photo courtesy of washington state University

Stinkbugs in the past haven’t been of much concern for Pacific Northwest cherry growers. But with later varieties now being grown and extended growing seasons, stinkbugs could be a pest to [...]

  • New pest keeps industry guessing

New pest keeps industry guessing

  • March 1st, 2012

A female spotted wing drosophila is about to enter a Contech apple cider vinegar trap. WSU scientists will be trapping for the pest during the coming season and will send out e-mail alerts.
ELIZABETH BEERS, WSU

Will spotted wing drosophila became a threat to cherry production in Washington State, or [...]

How to conserve beneficials while fighting stinkbug

  • March 1st, 2012

Penn State University entomologist Dr. David Biddinger provided some rules of thumb growers can apply so as not to destroy all natural enemies and the integrity of integrated pest management programs as they go about controlling the brown marmorated stinkbug.

Insecticide selection—Choose the product least harmful to natural enemies, but [...]

  • Biocontrol is fragile

Biocontrol is fragile

  • March 1st, 2012

These four creatures have survived pesticide treatments to become the most important biocontrol agents in eastern apple orchards. There are two species of predatory mites (far left and far right pictures); the “mite destroyer” ladybeetle Stethorus punctum (center left); and the woolly apple aphid parasitic wasp, Aphelinus mali.

The arrival [...]