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Soybean Research Verification Program Update – August 1, 2011
Author: Chris Grimes, Program Associate - Soybean/Wheat Verification Coordinator

Bollworm levels have increased drastically in some of the verification fields in the past 10-14 days. See Dr. Gus Lorenz’s post on the bolloworm situation in soybean featured in this week’s Arkansas Row Crops e-newsletter and on for more information on treating for bollworm infestations.

Insects, weeds and irrigation continue to be on the forefront of the activities in the Soybean Research Verification Program. So far, disease pressure hasn’t been a problem in any of the fields in the program.


August 01, 2011 SRVP Weekly Update
CountyVariety StageGeneral Information
Arkansas N (DC)Halo 5:25V10First irrigation completed early this week. Despite 22 oz. Ignite + 1 1/3 pt. Dual at V3 followed by 22 oz. Ignite ten days later, we still have pigweed escapes. Grower will have the field hoed next week prior to seed development.
Arkansas SHalo 5:65V16-R21st irrigation completed earlier this week. Two applications of Ignite have cleaned the field up and beans are lapped now. Bollworm numbers are at treatment level. A pyrethroid + 1/2 # acephate was recommended.
ChicotPioneer 94Y70V20/R43rd irrigation complete. Very good yield potential. A pyrethroid + 1/2 # acephate was applied for bollworm on Tuesday with very good control.
ClayPioneer 95Y01V15-R2 Field has been irrigated and had good moisture his week. Worm pressure has increased to treatment levels this week and we recommended treating the field with 1gal/70A of Karate Z plus 1% COC.
ConwayPioneer 95Y01V12-R2Insect pressure was low in this field this week and we caught about ½” rain on 7/24. Cooperator continues to walk the pivot across the field every 5 days.
CraigheadHalo 4:65V15-R2The field received irrigation last week and had good soil moisture this week. We found treatment level for bollworm this week and recommended 1gal/70A Karate Z plus ½#/A Orthene plus 1% COC for control. If no rain the field will need irrigation by the middle of next week.
CrossProgeny 4807V15-R2Bollworm pressure in this field has exploded this week. The field had exceeded threshold numbers on Monday (7/25) we recommended 1gal/70A Karate Z for control. We scouted the field again on 7/28 and found treatment levels again requiring another insecticide application. Field received irrigation and had good moisture on 7/28.
Desha-1Armor 47R33V24-R43rd irrigation complete.
Desha-2 (DC)Delta Grow 5300V422 oz. Roundup PowerMax + 1 1/3 pt. Dual was applied and grower is preparing for first irrigation.
DrewAsgrow 4703V19/R5.5Insects continue to remain at low levels. 4th irrigation complete.
Faulkner (DC)Delta King 4744V2-V4Field continues to struggle due to the hot conditions even though we are keeping the field moist with the center pivot. Recommended 3pt/A Flexstar GT for weed control and start the pivot back on the field.
LawrencePioneer 94Y91V16-R2The field continues to grow and looks good. Insect pressure was low in this field. Field is being irrigated about every 7 days.
Lincoln-1Halo 5:65V18-R2Bollworm numbers reached treatment level and a pyrethroid + 1/2 # acephate is scheduled. First irrigation underway.
Lincoln-2 (DC)Hornbeck 5226V532 oz. Roundup PowerMax + 1 1/3 pt. Dual applied a week ago, and irrigation is underway.
PhillipsOzarkV13-R1Boundary applied pre followed by Blazer + Dual at V3 worked very well. 2nd irrigation completed. Bollworm numbers as of Tuesday were very low.
PoinsettArmor 49V6V13-R2 We caught an 8/10” rain on (7/22) and the field had been irrigated. The field had good soil moisture on (7/28). Found treatment level for bollworms and recommended 1gal/70A plus ½# acephate for control.

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