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Events

  1. Texas: Small Acreage Farm Equipment Field Day, Cameron, April 30

    April 30 @ 8:00 am - 5:00 pm
  2. Texas: 2 Grain Grading Workshops, Amarillo, May 3-4

    May 3 @ 8:00 am - May 4 @ 5:00 pm
  3. Texas: Spring Field Day, Chillicothe, May 4

    May 4 @ 8:00 am - 5:00 pm
  4. Texas: Annual Concho, McCulloch County Wheat Tour, Millersview, May 5

    May 5 @ 8:00 am - 5:00 pm
  5. Texas: Private Pesticide Applicators Training, Menard, May 5

    May 5 @ 8:00 am - 5:00 pm
  6. Texas: Private Pesticide Applicator Training, San Angelo, May 6

    May 6 @ 8:00 am - 5:00 pm
  7. California: Almond Workshops Scheduled May 10-12

    May 10 @ 8:00 am - May 12 @ 5:00 pm
  8. Kentucky: Wheat Field Day, Princeton, May 10

    May 10 @ 8:00 am - 5:00 pm
  9. Texas: Multi-County Ag Chemical Collection Event, Kenedy, May 11

    May 11 @ 8:00 am - 5:00 pm
  10. Texas: Private Pesticide Applicator Training, Floresville, May 16

    May 16 @ 8:00 am - 5:00 pm
  11. Texas: Ag Forum, Austin, May 16

    May 16 @ 8:00 am - 5:00 pm
  12. Kansas: Wheat In-Depth Diagnostic School, Colby, May 17-18

    May 17 @ 8:00 am - May 18 @ 5:00 pm
  13. North Carolina: Pesticide Disposal Day, Washington, May 18

    May 18 @ 8:00 am - 5:00 pm
  14. Texas: Land, Water, and Wealth Symposium, Lufkin, May 20

    May 20 @ 8:00 am - 5:00 pm
  15. Georgia: Pest Manager Training, Valdosta, May 27

    May 27 @ 8:00 am - 5:00 pm
  16. Tennessee: Weed Tour, Jackson, June 22

    June 22 @ 8:00 am - 5:00 pm
  17. Southern Peanut Growers Conference, Miramar Beach, FL, July 21-23

    July 21 @ 8:00 am - July 23 @ 5:00 pm
  18. Illinois: Agronomy Day, Savoy, August 18

    August 18 @ 8:00 am - 5:00 pm

North Carolina Soybeans: Stink Bugs, Kudzu Bugs, Podworms Still Threat

Owen Taylor
By Jack Bacheler, Extension Entomologist, North Carolina State University September 1, 2012

North Carolina Soybeans: Stink Bugs, Kudzu Bugs, Podworms Still Threat

While September is a time when most cotton fields are no longer vulnerable to insect damage, this month can be a different story for soybean producers.

Our generally high 2012 levels of green and brown stink bugs can translate into possible damage to soybean fields that are still filling out pods – that’s much of our acreage. In tests at Rocky Mount, where several planting date and maturity groups were evaluated for insect damage, stink bugs have remained well below threshold levels; this has also been the case at all of our kudzu bug test sites. Of course this might not be the case in other areas.

In our kudzu bug insecticide screening test in Randolph County, the nymph levels in the untreated plots averaged 103.5 per 25 sweeps, or approximately 4 per sweep at 7 days after treatment, in line with the 3-day evaluation. This is more than 4 times the threshold of 1 nymph per sweep or 15 per 15 sweeps, and suggests that other fields in this part of the state and elsewhere may also be at threshold.

A number of treatments containing either bifenthrin or lambda-cyhalothrin showed between 99 and 100 % control of nymphs and similar control of adults. On the return trip to Raleigh, only one field out of the 6 where I stopped to sweep was close to the suggested threshold.

This morning’s assessment of a second kudzu bug insecticide screening test near LaGrange in Lenoir County yielded similar results, with all insecticides providing more than 98% control except for Orthene and Belay at the 3-day check (Azera was not included in this test). A more comprehensive data base of kudzu bug insecticide efficacy comparisons can be found on our blog.

Producers are strongly encouraged to sweep field interiors. Many soybean fields will be below nymph threshold and can quickly be ruled out, while others may contain high enough levels of nymphs and to justify treatment.

Finally, podworms are still a potential threat to later planted beans that are still blooming and stinks bugs can still pose a threat at any time during pod fill. At a minimum, higher risk soybean fields should be assessed regularly until pod fill.

Owen Taylor
By Jack Bacheler, Extension Entomologist, North Carolina State University September 1, 2012