Posts Tagged ‘20:7’

Potato Late Blight Confirmed in North Carolina

Thursday, May 3rd, 2012

Kate Everts, Vegetable Pathologist, University of Delaware and University of Maryland;

Late blight has been confirmed on potato in a field in North Carolina on May 2, 2012. Growers in Maryland and Delaware should scout their fields and apply a preventative fungicide such as chlorothalonil, mancozeb or Polyram. If the disease spreads north to Virginia, be prepared to apply a more targeted fungicide.

Blackhawk Naturalyte Insecticide Label

Thursday, May 3rd, 2012

Joanne Whalen, Extension IPM Specialist;

Blackhawk Naturalyte insecticide from Dow AgroSciences with the active ingredient spinosad is labeled in Delaware on the following vegetable crops: sweet corn, legume vegetables (which includes peas, snap beans and lima beans) and potatoes. Please check the following link for insects controlled, use rates and restrictions:

Vegetable Crop Insects – May 4, 2012

Thursday, May 3rd, 2012

Joanne Whalen, Extension IPM Specialist;

As soon as plants are set in the field, be sure to scout for aphids, cucumber beetles, and spider mites. The first cucumber beetles have been observed and with the predicted warmer weather for the end of week we could see an increase in activity. Since beetles can continue to re-infest fields as well as hide under the plastic, multiple applications are often needed to achieve control.

Low levels of the first emerged adults continue to be found in fields where an at planting insecticide was not used. A treatment should not be needed for adults until you find 25 beetles per 50 plants and defoliation has reached the 10% level.

Snap Beans
Be sure to sample all seedling stage fields for leafhopper and thrips activity. The thrips threshold is 5-6 per leaflet and the leafhopper threshold is 5 per sweep. If both insects are present, the threshold for each should be reduced by one third.

Sweet Corn
Be sure to scout emerged fields for cutworms and flea beetles. As a general guideline, treatments should be applied for cutworms if you find 3% cut plants or 10% leaf feeding. In order to get an accurate estimate of flea beetle populations, fields should be scouted mid-day when beetles are active. A treatment will be needed if 5% of the plants are infested with beetles. In fields that were planted under plastic, begin to scout for corn borers as soon as the plastic is removed.

University of Delaware Small Fruit Twilight

Thursday, April 19th, 2012

Tuesday, May 22, 2012     6:00-8:00 p.m.
Carvel Research and Education Center
16483 County Seat Highway
Georgetown, DE 19947

Participants will have the opportunity to tour experimental plots and hear about current research on June-bearing and day-neutral strawberries, blueberries and blackberries.

Strawberry research includes plasticulture variety trials with USDA selections from the Beltsville breeding program; summer planted and overwintered day neutral varieties; spring 2011 planted, overwintered, and crown thinned day neutral varieties for summer 2012 production; use of shade cloth and reflective mulch for temperature reduction in day neutral strawberries; and root inoculant and mustard seed meal treatments for root health and soil disease management in strawberries.

Blueberry research includes a 2011 planted variety trial with southern highbush selections; a mulching material study; and a planting hole treatment study.

Blackberry plots are concentrated on evaluating primocane bearing fall fruiting varieties from the University of Arkansas breeding program.

Also featured will be insect management programs and emerging insect pests of small fruits (spotted wing Drosophila).   Extension specialists and associates will be on hand to lead the tour and answer questions.

Strawberry tastings and light refreshments served.

To register, contact Karen Adams at (302) 856-2585 ext. 540 or email

For additional program information, contact Gordon Johnson,, (302)-856-2585 ext. 590,

2012 Wye REC Strawberry Twilight

Thursday, April 12th, 2012

Wednesday, May 9, 2012     6:00-8:00 p.m.
Wye Research and Education Center
Farm Operations Complex, 211 Farm Lane, Queenstown, MD
(Directional signs will be posted.)

You’ll hear University of Maryland and USDA small fruit experts discuss the current season’s challenges and the impact that the new fruit pest may have on the industry.

You’ll see: USDA Moveable High Tunnel plots with plasticulture strawberry production; University of MD Strawberry High Tunnel plots with table top production demonstration and bio-fumigation trial; and Outdoor Plasticulture Fertility Trial plots with Chandler strawberries.

Refreshments will be served.

The meeting will be held rain or shine.  Pre-registration is not necessary. For additional program information, contact Mike Newell,, (410) 827-7388. If you need special assistance to attend this program, please contact Debby Dant, (410) 827-8056, no later than May 2, 2012.