What's HOT in Grape Production and Research

(Updated 27 April 2018)

Vineyard IPM Workshop: April 17 at Early Mountain Vineyard,
6109 Wolftown-Hood Rd, Madison, VA 22727.  Specialists will discuss weed science, plant pathology and entomology, including updateson invasive pests.

Spotted lanternfly a new invasive concernA new invasive pest of small fruit crops and vineyards moved into eastern Pennsylvania in 2014, and has been spreading.  In 2017, the range increased from 6 to 13 Pennsylvania counties, and also into Delaware, New York and northern Virginia.  Specimens of dead adults and egg masses were found in January 2018 (actually 2017 individuals).  This pest poses an important risk for grape, orchard and tree crops.  Click here for an Adobe Presenter talk on this species.  A fact sheet is available from Virginia Tech (a USDA fact sheet is available in Spanish).  Now that spotted lanternfly has been found in Virginia, it will be important to follow its spread through the state.  To report a suspected find, please follow this linkhttps://ext.vt.edu/spotted-lanternfly.

Fruit Insect Blog for current information of fruit insects! 
Visit https://virginiafruitinsectupdates.blogspot.com/.


Spotted wing drosophila:  A new invasive pest of small fruit crops and vineyards moved through Virginia in late summer 2011.  Spotted wing drosophila, Drosophila suzukii, differs from other species of vinegar or pomace flies in that it lays eggs in ripening fruit on the vine or plant, rather than in overripe or rotting fruit material.  This has the potential to be a major problem for growers of soft-fruited crops.  More information is posted in a SWD page in the Virginia Fruit web site.  Hear an Adobe Presenter presentation on spotted wing drosophila in vineyard and berry crops.

Brown marmorated stink bug and Virginia fruit: See StopBMSB.org web site  A new addition to the stink bug complex is brown marmorated stink bug, Halyomorpha halys (Stål).  Brown marmorated stink bug (BMSB) has recently been introduced from Asia into the northeastern U.S.  It was first detected in 1998 in Allentown, Pennsylvania (see NAPIS map; this map underrepresents the situation in Virginia).  It was later found in New Jersey, Maryland and Delaware, and in October 2004 it was found in Montgomery County, Virginia, and in Tennessee in 2008.  Injury in tree fruits can be severe, exceeding 25% (individual blocks have been estimated to have much higher levels of fruit injury).  Externally, fruit may have multiple reddish dents at feeding sites, resembling hail strikes.  Upon cutting into fruit, corky areas are seen in the flesh of the fruit.  In vineyards, a unique problem is posed.  Stink bugs may be harvested along with clusters and be transported to the winery in lugs or bins, where the wine can be imparted with a "stink bug taint".  Research is underway to test short-residual insecticides to knock down BMSB from clusters at harvest.  For further information and images, see the Brown marmorated stink bug page.  A working group on organic management of BMSB has been established, with their own web site.  There is opportunity to participate in grower forums.  Listen to Adobe Presenter presentation on BMSB in vineyards and caneberries (14 min.).

Mating disruption for grape root borer now available:  Grape root borer has been a difficult pest to control, and has been increasing in severity in Virginia vineyards.  A mating disruption product, Isomate GRB, is now registered.  The label is available (Great Lakes IPM), as is the MSDS (Pacific Biocontrol).  The rope-style pheromone dispensers should be placed in the last week of June, at a rate of 100 ropes per acre.

A new winegrape production guide, edited by Tony Wolf, is now available through NRAES, entitled Winegrape Production Guide for Eastern North AmericaThis comprehensive reference will be used by novice and experienced growers, crop advisors, service providers, educators, communicators, and students. It provides information on all aspects of wine grape culture including site selection and preparation, trellising and pruning, disease and pest identification, nutrient management, irrigation, pesticide application, harvesting, vineyard cost and returns, and grape sales.  This 336-page guide is available at the NRAES web site for $75.00. 

Online master's Degree: The College of Agriculture and Life Science at Virginia Tech has established a new on-line Master's in Agriculture and Life Sciences.   This curriculum has been approved by the State Council of Higher Education and is now accepting applications for Fall semester 2007.  In this program, you can earn a master's degree in agriculture while working in your current job - emphasis is on education for place-bound learners, and all courses are taken on-line.  In addition to a core area, there are courses offered in five areas of concentration: (1) Biosecurity, Bioregulations and Public Health, (2) Education, (3) Environmental Science, (4) Food Safety, and (5) Plant Science and Pest Management.  In addition to course work, the student completes a project decided upon in consultation with your major advisor.  Lists of courses within each concentration may be found in the web site linked above.  This program was recently the subject of an interview by Jeff Ishee with Virginia Public Televsion's Virginia Farming.   (see 2017-2018 Extended Campus tuition rates).

Imidan restrictions in vineyards:

There has been confusion regarding the advisability of the use of Imidan in vineyards.  In 2006, the Restricted Entry Interval (REI) was extended to 14 days.  This makes Imidan impractical for most grape growers to use.  In 2007, a label is posted on the newly reformatted CDMS web site, a source of pesticide labels and material safety data sheets.  In some of these labels, a REI of 24 hours is given.  This has been the source of confusion in the status of the REI for this product.  This is an outdated label that is kept online by CDMS because of certain requirements in California.  It refers to the 70W formulation without water soluble bags.  Although the old label is still posted, it is no longer supported by Gowan.  Only the formulation in water soluble bags is supported.    The REI of 14 days for phosmet remains in effect.  Virginia grape growers will be notified if there is a possibility of this changing, particularly if there is an opportunity for public input.


2018 Revisions to Commercial Vineyard Spray Guide:

The revised Pest Management Guide for commercial vineyards is now available.  (The Pest Management Guide is available on-line for free. Hard copies are also available for $6.00 plus shipping.  Call 540-231-1322).

2018 Revisions to Home Fruit Spray Guide:

The revised Pest Management Guide for Home Grapevines is now available.  (The Pest Management Guide is available on-line for free. Hard copies are also available for $15.00 plus shipping.  Call 540-231-1322).14.

New Viticulture link in Virginia Fruit Page:

The link for viticultural information now leads to Viticulture Notes, a bimonthly newsletter by Tony Wolf of Virginia Tech's Alson H. Smith Agricultural Research and Extension Center in Winchester. This site provides information on general viticultural topics, as well as information on upcoming educational meetings.

Vineyard and Winery Festivals:

In the VDACS Wine Web Site, there is a listing of Virginia Winery Festivals
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Send comments by e-mail to: Douglas G. Pfeiffer