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Stink Bug Movement, Sampling, Damage, and Controls - Lessons Learned in Recent Years

This study explores stink bug movement, sampling techniques, damage levels, and control measures in cotton fields. It compares different thresholds, sampling methods, and residual control under continuous stink bug reinfestation. The study also examines yield losses and cotton quality losses caused by stink bug damage.

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Stink Bug Movement, Sampling, Damage, and Controls - Lessons Learned in Recent Years

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  1. Open Discussion“Stink Bug Movement, Sampling, Damage and Controls – What We Have Learned in Recent Years” 2006 GA PAC/ACAA Annual Meeting Dothan, Al February 15-16,2006

  2. Regional Stink BugProjectThreshold StudyHeadland, Al 2005 Three Thresholds 1. Untreated 2. 20% Damage 3. Bug-Free (weekly sprays)

  3. Objective: To Correlate various stink bug numbers to boll damage levels. To compare drop cloth and boll crushing as sampling techniques. To measure control residual under a continuous stink bug reinfestation situation. To measure yield losses with different threshold levels. Document cotton quality losses from stink bug damage.

  4. Methods: Planted 8 rows of DPL-543 BGII/RR cotton through the middle of peanut field at Wiregrass Research and Extension Center, Headland Al. Three thresholds replicated from times in 90 ft. plots. Sampled 12 row foot by drop cloth and pulled 10 quarter size bolls per plot weekly from July 19( 3rd week of bloom) to Sept. 8. Harvested on October 21. Seed cotton samples sent to Tifton GA. for ginning and quality measurements.

  5. Treatments Applied and Dates: Bug Free July 19 Bidrin 0.5 lb. + Karate .0325 (1 to 64) July 26 Bidrin 0.5 lb. + Karate .0325 Aug. 2 Bidrin 0.38lb. + Karate .0325 Aug. 8 Bidrin 0.38lb. Aug.19 Bidrin 0.38 lb. Aug.26 Bidrin 0.38 lb. + Karate .0325 Sept. 8 Bidrin 0.38 lb. 20% Damage July 19 Bidrin 0.5 lb. + Karate .0325 July 26 Bidrin 0.5 lb. + Karate .0325 Aug. 19 Bidrin 0.38 lb. Aug .26 Bidrin 0.38 lb. + Karate .0325 Sept.8 Bidrin 0.38 lb. Untreated No treatments made.

  6. % Stink Bug Damaged Bolls and Number Stink Bugs/12 row Ft. Untreated 20% Damage Stink Bug Free %Damage#SB%Damage#SB%Damage#SB July 19 18 0.8 18 0.8 18 0.8 July 26 97 12.2 57 3.2 35 0.7 Aug. 2 87 10.5 27 0.5 22 0 Aug. 8 97 7.0 10 0.75 5 0 Aug. 16 90 5.0 40 7.7 12 0.5 Aug. 23 87 5.8 38 0.1 25 0 Aug. 30 90 -- 8 -- 10 -- Sept. 6 85 --___________2_______--__________2_____ --_ Average 91 8.1 30 2.5 16 0.2

  7. Wiregrass Stink Bug Threshold Test% of Bolls DamagedHeadland, AL 2005 Bug Free: 7applications Univ.Threshold: 5 applications

  8. Wiregrass Stink Bug Threshold Test# of Stink Bugs/ 12 Row FeetHeadland, AL 2005 Bug Free: 7 applications Univ. Threshold: 5 applications

  9. Stink Bug Threshold Test Headland, Al 1714 Variety: DPL-543 BG II/RR 1375 Yield- (lbs. lint) (+$726) (+$556) 263

  10. Other Information About Stink Bugs as Cotton Pests: • Life Cycle • Damage Stage • Predicting severity of stink bug year • Movement from crop to crop (corn vs. peanuts) • Movement within crop • Residual Control with the recommended insecticides • Border Sprays • Most critical weeks of season • When it is boll safe • When to begin sampling • How to select a boll (size, soft and not hard) • What to look for inside boll (crush and peel) • Bolls to sample per field (25-50)

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