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Orchard ground covers
For 21 years now, Dr. Ian Merwin has tended a 320-tree apple orchard on the
New grape disease reduces yields, quality
Left: A Merlot grapevine shows redleaf symptoms on mature leaves in the lower portions of
How integrated mite control works
One of the keys to integrated mite control was that the western predatory mite Typhlodromus
Calculating the value of biological control
Washington State University entomologist Dr. Stan Hoyt developed integrated mite control in the late 1960s
Developing a disease management program
Washington State University viticulture extension specialist Dr. Michelle Moyer suggests growers consider the following when
Living with cherry diseases
Little cherry disease made a dramatic resurgence in Washington in 2010 and has since spread
Deer Wars
Growers in the prime fruit-growing area surrounding Grand Traverse Bay in northwest Michigan are protesting
Preventing mildew
Guide for grape pest management available Washington State University’s 2013 Grape Pest Management Guide includes
Working with copper
Copper is a potent spray chemical, useful on many stone and pome fruits. It is
Codling moth: It’s what’s for dinner.
A sterilized carabid beetle before gut dissection. Angela Gadino, WSU Do you ever wonder what
The Top 5: What growers can do to improve pollination success
Inspect the bees you receive. A strong hive should have enough adult bees to cover
Kill the pathogen
Apple scab is a serious problem in humid climates, and McIntosh is very susceptible. Lesions
One last Guthion spray
Fruit growers in Michigan can use existing stocks of the insecticide azinphos-methyl (Guthion) one more
For the birds
Preliminary estimates of bird damage to fruit crops made during 2012 show what fruit growers
Stinkbug is strong flier
The stinkbug injects saliva into the fruit and then sucks out the juice, causing brown
Good to Know: New traps and lures for tree fruit pests
Left: Figure 1. Ajar trap for oriental fruit moth with exclusion holes. Right: Figure
Last Bite: Do you know your pests?
1 In which plant has the brown marmorated stinkbug been most commonly found in Oregon?
Bug pheromone studied
In tree fruit pest management, most monitoring and mating disruption technologies are based on pheromones
Bacterial canker
A classic bacterial canker symptom showing cankers and gummosis of woody tissue.PHOTO COURTESY OF
A new tool for IPM
Left: Syrphid fly (also known as hover fly) larvae or maggots like this are
Natural enemy inventory
Herbivore-induced plant volatile (HIPV) lure to attract natural enemies in orchards. Monitoring is one of
Behind the scenes at the NOSB
Harold Austin In April, the National Organic Standards Board will decide whether organic apple and
Fireblight-resistant apple
Ladina, a new high-quality apple variety with low susceptibility to fireblight and mildew, has been
Turning on a plant’s defenses
New technology is coming to the apple and pear industry to help control fireblight. Actigard
Coppers are a fit for organics
Before the 1960s, there were no antibiotics to help orchardists control fireblight, one of the
Growers have several choices in fireblight control
Pear and apple orchardists have a fairly broad field of products to use in controlling
Fireblight, antibiotics, and the NOSB
Antibiotics have long been key disease control materials for fireblight, one of the few uses
Last Bite
1 Which of the following is not a fruit symptom of little cherry disease? a.
An expensive disorder
Photos courtesy of Bhaskar Bondada A shrivel is not just a shrivel. Of the various
Identifying grape shrivels
In the past, grape growers have mistaken any shrivel in their fruit for grape berry
Fireblight is native to North America
Fireblight is a plant disease of apples and pears caused by the bacterium Erwinia amylovora.
Good Stuff
Hydroponic irrigation New technology combining hydroponics and drip irrigation is being used to grow fruit
Enhancing biocontrol
Knowing when and where natural enemies, such as the green lacewing, are active is critical
Last Bite
1. Which of the following is not a tree fruit disease? a. Black rot
Eradication not likely
The light brown apple moth is about a quarter of an inch long. PHOTO BY
Sterile insects get a boost
Peter Teal works with several species of fruit flies. The Caribbean fruit fly has
Research project tackles trunk diseases
Researchers will use nearly $1.8 million in grant money to develop new detection, extension, and
Yeast tested as lure
The spotted wing drosophila. A species of yeast that University of California scientists
B.C.’s Sterile Insect Release program evolves
To determine sterility, squash a codling moth. The red food dye in their diets
Seaweeds tested for pest control
Seaweed extracts are typically used by growers with the aim of improving tree growth and
Good to Know
Brown marmorated stinkbugs feed on the foliage and fruit of grapevines. Grape growers
Biocontrol veteran arms for battling brown marmorated stinkbug
Small, white larvae (inset photo above) of the sand wasp, Bicyrtes quadrifasciata, feed on
Clean vines keep viruses out
Washington State University postdoctorate student Femi Alabi demonstrates how grape tissue is analyzed for
Plant in clean ground
Grape selections that come out of the Clean Plant Center-Northwest Grapes are certified to be
Stinkbug biocontrol
Perdue University Extension Brown marmorated stinkbug, an invasive insect from Asia, swept over the Mid-Atlantic
Insect-resistant varieties
Joseph Schwarz explains how he screens trees for resistance to leafrollers during WSU’s field
Parasite studied in quarantine
Scientists around the United States are studying a natural enemy of the brown marmorated stinkbug
Fireblight expert retires
Larry Pusey has used crab apples for his fireblight studies, as they can be manipulated
Good Stuff
Bayer purchases AgraQuest Bayer Crop Science, headquartered in Germany, has purchased the U.S. biological crop-protection
Sweet!
Scientists are testing a sweet idea that might help organic cherry growers manage insects, birds,