Category Archives: Insect

EPA decision on chlorpyrifos

The head of the EPA, Scott Pruitt, signed an order last night denying the petition to ban chlorpyrifos (Lorsban). This decision will allow peanut growers in our area the continued use of this insecticide for the foreseeable future, perhaps until 2022 when the EPA is required to reevaluate safety of this product. The environmental group that filed the 2007 petition to ban chlorpyrifos has announced its plans to appeal the decision.  More information can be found here – https://www.epa.gov/newsreleases/epa-administrator-pruitt-denies-petition-ban-widely-used-pesticide-0

Warm weather and grain bin insects

Our recent warm weather has done more than wake up your plants – it has signaled to many insects that it is time to start feeding and reproducing. Prompted by a call from ANR agent Mike Parrish in Dinwiddie County, I spoke today with Kathy Flanders at University of Auburn about her recommendations to mitigate insect injury in store grain. Her #1 suggestion – turn on those fans! Your goal should be to keep the temperature inside your bin below 60 degrees. Make sure and leave equipment running long enough to cool the entire structure. If you are unable to keep temperatures below this threshold, or if our nights do not stay cool, make sure to take samples regularly to scout for insect injury. Consult this guide for management recommendations specific to the Southeast: http://www.aces.edu/pubs/docs/I/IPM-0330/IPM-0330.pdf.

View the Program: Virginia Eastern Shore Ag Conference and Trade Show

We look forward to seeing you January 25th and 26th at the 27th Annual Eastern Shore Ag conference & Trade Show! You can find the program online at: https://onedrive.live.com/?authkey=%21AEczhxLIHkUCwmY&cid=05F6B732110DB231&id=5F6B732110DB231%2129963&parId=5F6B732110DB231%21813&o=OneUp. Virginia pesticide re-certification and Certified Crop Adviser credits will be available. See the program for more information.

The event will be held at the Eastern Shore Community College Workforce Development Center, 29300 Lankford Highway, Melfa, VA 23410. When you enter the driveway to the Community College, we will be meeting in the building to the left.

The Annual Oyster Roast will be held on Wednesday night, January 25th beginning with a social at 6:00 pm and oysters served at 6:30 pm. Along with oysters, there will be all-you-can-eat barbecue, sides and beverages. Tickets will be $35.00 in advance and $40.00 if purchased the day of the oyster roast.

If you have any questions or concerns please contact either Theresa Pittman (tpittman@vt.edu) or Ursula Deitch (ursula@vt.edu) for accommodation. Thank you!

Virginia Cooperative Extension logo

Virginia Eastern Shore Ag Conference and Trade Show

Join us in Melfa, VA for the 27th Annual Eastern Shore Agricultural Conference and Trade Show on January 25-26, 2017. This event is free, open to the public, and will be held at the Eastern Shore Community College Workforce Development Center. We will offer Virginia Pesticide Recertification credits for categories 1A, 10, 60, and 90. We will also offer Certified Crop Adviser Credits for nutrient management (2), soil and water (1), integrated pest management (4.5), crop management (6), and professional development (0.5). Click on the following link for topic areas being presented: ag-conf-press-release-2017

Insect update for Sep. 29, 2016

The 2016 survey of Virginia soybean for brown marmorated stink bug (BMSB) and kudzu bug is now finished.  We would like to acknowledge the Virginia Soybean Board and the USDA/NIFA Extension Implementation Project for their funding support.  Since mid-July, scouts Ed Seymore, Jamie Hogue, and the Tidewater AREC entomology crew made 867 soybean field visits to 68 counties for this project.  Ed and Jamie traveled a combined 22,600 miles.  BMSB were found in 42 counties, with the highest populations coming from Bedford, Shenandoah, Rappahannock, and Orange Counties.  Please see the map for the BMSB densities.

BMSB_density_map_2016

Large numbers of green stink bug were reported in soybean in King George (11 greens per sample), Nelson (12), New Kent (10), Rappahannock (11), and Lunenburg (9); these beans were all in the R6 growth stage.  The threshold for R3-4 to R7 stages is 5 stink bugs per 15 sweeps.  Moderate green stink bug populations (approximately 3-5) were reported in most of the other counties surveyed this past week.  After R7 (beginning maturity),  the stink bug threshold is doubled.

Scouts reported less than one kudzu bug nymph per 15 sweeps this week.  Over the course of the season, kudzu bugs were found in soybean in 32 counties.  Here is the final kudzu bug map:

KB_map_29_Sep_2016We conducted 77 cypermethrin vial tests this week with 61% survival by corn earworm moths.  We plan to finish out the season with what we collect and test next week.  The seasonal average now stands at 43.1% survival.

AVT_29_Sep_2016Finally, our black light traps have been shut down for 2016.  The assistance of the participating Virginia Cooperative Extension Agents, growers, and Virginia Tech faculty and staff in this study is greatly appreciated.  Here are the final tables for this season:  BLT_29_Sep_2016

BMSB and kudzu bug survey of soybean: Sep. 22, 2016 update

Our soybean scouts detected brown marmorated stink bug (BMSB) in three new Virginia counties this week (Halifax, Greensville, and Brunswick).  They found soybean fields in the following counties at BMSB threshold (3-5 adults + medium to large nymphs per 2-minute visual count or per 15 sweeps):  Albemarle, Bedford, Fluvanna, Goochland, Greene, Orange, Rappahannock, and Shenandoah.  Please see the map for more details.

When monitoring, don’t forget about our native stink bug species–we have been seeing moderate to high numbers of green stink bugs in some fields.  The threshold for a normal mix of stink bug species (green, brown, and BMSB) is 5 in 15 sweeps.

BMSB_map_22_Sep_2016Kudzu bug numbers in soybean remain below threshold.

KB_map_22_Sep_2016

Insect pest update for Sep. 15, 2016

Soybean–brown marmorated stink bug (BMSB):  Our scouts detected BMSB in two new counties this week–Charles City and Stafford.  Eight counties were at threshold (3-5 per 2-minute visual count along the field edge)–these are listed at the bottom of the map.

BMSB_map_15_Sep_2016Soybean–kudzu bug:  A range of zero to 5 kudzu bugs per 15 sweeps was reported this week.  While no counties were at threshold levels (15 kudzu bugs per 15 sweeps), the highest numbers were reported in Campbell (5), Appomattox (4), and Amelia (3 per 15 sweeps).

KB_map_15_Sep_2016

Sorghum–white sugarcane aphid, Melanaphis sacchari:  No new counties reported for this pest this week.  So far this season, it has been confirmed in the following Virginia counties:  Amelia, Bedford, Charles City, Dinwiddie, Franklin, Greensville, Hanover, Isle of Wight, New Kent, Nottoway, Prince George, Southampton, Suffolk, Surry, and Sussex.

Corn earworm/bollworm resistance monitoring:  Survival of moths in the vial tests remains high.  We evaluated 297 moths this week, with 40.5% survival to the 5 microgram/vial rate of cypermethrin.  Our seasonal average stands at 42.8% survival (n = 1,552  moths evaluated).

Black light trap report:  Some reporting stations had a small bump upwards in the number of corn earworm moths captured (Warsaw, Prince George, Essex); declines occurred in Suffolk and Southampton.  Very few BMSB were caught.  Please refer to the tables for more information.  BLT_15_Sep_2016

Insect pest update for Sep. 8, 2016

White sugarcane aphid, Melanaphis sacchari, in sorghum:  I did not receive any reports of this aphid being found in any new Virginia counties this week.

Brown marmorated stink bug in soybean:  Our scouts reported 11 Virginia counties having threshold levels of BMSB, with highest numbers from Bedford and Orange (9 and 6 BMSB per 2-minute visual inspection, respectively).  First reports for the season came from James City, King George, Culpeper, and Frederick.  Please see the following map:

BMSB_map_6_Sep_2016Kudzu bug in soybean:  Our scouts have not found any Virginia counties with threshold levels of this pest in 2016.  The current map:

KB_map_6_Sep_2016Corn earworm/bollworm (Helicoverpa zea) resistance monitoring:  The number of moths surviving the 24-hour exposure to 5 micrograms of cypermethrin in this week’s vial tests was 45.8% (n = 180 moths evaluated).  The seasonal average is 43.4% survival, based on 1,255 moths tested. AVT_7_Sep_2016Black light trap counts:  Corn earworm moth captures dropped slightly from the previous weeks’ counts; brown marmorated stink bug counts were zero across all reporting stations.  Please see the attached tables (pdf document) for more details:  BLT_8_Sep_2016