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Effect of Varying Levels of Boll Feeding Bug Damage on Fiber Quality

Effect of Varying Levels of Boll Feeding Bug Damage on Fiber Quality. P. Roberts, A. Knowlton, and J Ruberson (UGA) J. Bacheler, D. Mott, D. Morrison, T. Pegram (NCSU) J. Greene, D. Robinson, T. Walker, S. Turnipseed, M. Sullivan (Clemson) R. Smith (Auburn), C. Bednarz (TTU).

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Effect of Varying Levels of Boll Feeding Bug Damage on Fiber Quality

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  1. Effect of Varying Levels of Boll Feeding Bug Damage on Fiber Quality P. Roberts, A. Knowlton, and J Ruberson (UGA) J. Bacheler, D. Mott, D. Morrison, T. Pegram (NCSU) J. Greene, D. Robinson, T. Walker, S. Turnipseed, M. Sullivan (Clemson) R. Smith (Auburn), C. Bednarz (TTU)

  2. Stink Bug Feeding • Piercing and sucking mouthpart. • Feeds primarily on fruiting structures and meristematic tissues (seed and surrounding tissues in cotton bolls). • Injects digestive enzymes. • Extracts dissolved plant tissue and sap. • Physical destruction of seed (lint production reduced). • Introduces or allows entry (wounds) of pathogens and decay organisms.

  3. Prefer medium sized bolls Small bolls shed Large bolls remain on the plant Susceptible <25 days of age (yield)

  4. Stink Bug Susceptible Fiber Development StagesElongation / Secondary Wall Deposition

  5. L(w) [in] (Treated – Untreated)All Locations, hand-picked by position AFIS – Cotton Incorporated

  6. Picker Efficiency of damaged bolls?

  7. Lint cleaners, other ginning processes?

  8. Objective and Methods • Quantify the impact of bug damage on fiber quality. • 24 field trials established in GA, NC, SC, & AL (2005) • Untreated vs. Bug Treated • Intermediate Treatments • Threshold • Progressive Protection • Machine-Picked Cotton • Simulate Commercial Ginning (UGA MicroGin) • HVI, AFIS (Cotton Incorporated) • Large data set with a range of bug damage. • Compared differences in quality values with most aggressive treatment in a given trial. • Grouped differences of treatment means from individual trials by yield loss (assumed yield loss due to bug damage).

  9. 2005 SE Regional Stink Bug ProjectUGA MicroGin mean=8.308 n=23 n=22 n=14 n=6 n=7 n=7 HVI and AFIS – Cotton Incorporated N=24 locations, 103 treatments (79 comparisons)

  10. 2005 SE Regional Stink Bug ProjectUGA MicroGin mean=35.93 n=23 n=22 n=14 n=6 n=7 n=7 HVI and AFIS – Cotton Incorporated N=24 locations, 103 treatments (79 comparisons)

  11. 2005 SE Regional Stink Bug ProjectUGA MicroGin mean=81.95 n=23 n=22 n=14 n=6 n=7 n=7 HVI and AFIS – Cotton Incorporated N=24 locations, 103 treatments (79 comparisons)

  12. 2005 SE Regional Stink Bug ProjectUGA MicroGin mean=0.985 n=23 n=22 n=14 n=6 n=7 n=7 HVI and AFIS – Cotton Incorporated N=24 locations, 103 treatments (79 comparisons)

  13. 2005 SE Regional Stink Bug ProjectUGA MicroGin mean=34.42 n=23 n=22 n=14 n=6 n=7 n=7 HVI and AFIS – Cotton Incorporated N=24 locations, 103 treatments (79 comparisons)

  14. 2005 SE Regional Stink Bug ProjectUGA MicroGin mean=9.030 n=23 n=22 n=14 n=6 n=7 n=7 HVI and AFIS – Cotton Incorporated N=24 locations, 103 treatments (79 comparisons)

  15. UGA Micro-Gin (HVI) 2005Stink Bug Trials, GA, SC, and AL HVI – Cotton Incorporated N=11 locations (trial means analyzed as reps)

  16. UGA Micro-Gin (AFIS) 2005Stink Bug Trials, GA, SC, and AL AFIS – Cotton Incorporated N=11 locations (trial means analyzed as reps)

  17. UGA Micro-Gin (AFIS) 2005Stink Bug Trials, GA, SC, and AL AFIS – Cotton Incorporated N=11 locations (trial means analyzed as reps)

  18. “Identifying Practical Knowledge and Solutions for Managing The Sucking-Bug Complex In Cotton: Research In The Southeast Region” Southeast State Support Committees

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