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Sugarcane aphids on the Texas
High Plains – The same
questions with different answers
Blayne Reed, EA-IPM Hale, Swisher, Floyd
Texas A&M AgriLife Extension
Sorghum – Sugarcane Aphid
Research Exchange Meeting
New Orleans, LA
January 7 – 8, 2016
Texas High Plains
Sugarcane Aphid Team
Name Affiliation Location
Blayne Reed Texas A&M AgriLife EA-IPM Hale,
Swisher, Floyd
Plainview, Texas
Pat Porter Texas A&M AgriLife District 2
Entomologist
Lubbock, Texas
Ed Bynum Texas A&M AgriLife District 1
Entomologist
Amarillo, Texas
Tommy Doederlein Texas A&M AgriLife EA-IPM Dawson,
Lynn
Lamesa, Texas
Kerry Siders Texas A&M AgriLife EA-IPM Hockley,
Cochran, Lamb
Levelland, Texas
Areas of Interest
• Pre-Existing Thresholds
– Do they work on the unique High Plains?
• Product Efficacy
• Host Plant Resistance
– How does it perform in the field on the
unique High Plains?
• Chemigation
– If coverage is an issue…
Materials & Methods
• Efficacy Trials
• Host Plant Resistance (Halfway Station
2015)
– 3 resistant lines (NK 7633, SPX 17414, SPX
17514)
– 1 susceptible line KS 585
– Large plot, 3 reps
• Chemigation
– Sivanto @ 5 oz./ac. + 0.25 v/v NIS
– 3 “treatments” 1)UTC, 2)Water Wash,
3)Sivanto
Revised Threshold for Texas High Plains
Grain Sorghum Action Threshold
Growth
Stage
Decision threshold speci ic to the
sugarcane aphid
Pre-Boot 20% of plants with presence of aphids
Boot 20% of plants infested with 50 aphids per leaf
Flowering -
Milk
30% of plants infested with 50 aphids per leaf
Soft Dough 30% of plants infested and localized areas
with heavy honeydew and established
colonies
Dough 30% of plants infested and localized areas
with heavy honeydew and established
colonies
Black Layer Heavy honeydew and established aphid
colonies. Only treat to prevent harvest
problems. Observe Preharvest intervals
This threshold was revised from a threshold originally from Mississippi State University.
Insecticide selection
--Not labeled--
Label
suspended
Data: Ed Bynum and Pat Porter, 2015, Bushland
Resistant hybrids have fewer aphids
(but still too many if untreated)
Data: Blayne Reed, 2015, Halfway Experiment Station
Resistant hybrids yielded an average of 1,169 lbs./acre more than the susceptible.
Market value of $126.29 at $6.05 per bushel.
Data: Blayne Reed, 2015, Halfway Experiment Station
Chemigation is Effective But Not Labeled Yet
Hale Center chemigation trial with 5.0 oz of Sivanto
Data: Blayne Reed, 2015, Hale Center
Take Home
• Texas High Plains requires
differing action threshold
• Value to host plant resistance in
the Texas High Plains sorghum
fields
• Chemigation works! Need
label…
Next Steps
• Overwintering locations and / or arrival
predictions
• Early Planting Trials
– True IPM implementation
• Overwintering predator
management
Questions?
Get the latest at http://txscan.blogspot.com

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Sugarcane aphids on the Texas High Plains - The same questions with different answers

  • 1. Sugarcane aphids on the Texas High Plains – The same questions with different answers Blayne Reed, EA-IPM Hale, Swisher, Floyd Texas A&M AgriLife Extension Sorghum – Sugarcane Aphid Research Exchange Meeting New Orleans, LA January 7 – 8, 2016
  • 2. Texas High Plains Sugarcane Aphid Team Name Affiliation Location Blayne Reed Texas A&M AgriLife EA-IPM Hale, Swisher, Floyd Plainview, Texas Pat Porter Texas A&M AgriLife District 2 Entomologist Lubbock, Texas Ed Bynum Texas A&M AgriLife District 1 Entomologist Amarillo, Texas Tommy Doederlein Texas A&M AgriLife EA-IPM Dawson, Lynn Lamesa, Texas Kerry Siders Texas A&M AgriLife EA-IPM Hockley, Cochran, Lamb Levelland, Texas
  • 3. Areas of Interest • Pre-Existing Thresholds – Do they work on the unique High Plains? • Product Efficacy • Host Plant Resistance – How does it perform in the field on the unique High Plains? • Chemigation – If coverage is an issue…
  • 4. Materials & Methods • Efficacy Trials • Host Plant Resistance (Halfway Station 2015) – 3 resistant lines (NK 7633, SPX 17414, SPX 17514) – 1 susceptible line KS 585 – Large plot, 3 reps • Chemigation – Sivanto @ 5 oz./ac. + 0.25 v/v NIS – 3 “treatments” 1)UTC, 2)Water Wash, 3)Sivanto
  • 5. Revised Threshold for Texas High Plains Grain Sorghum Action Threshold Growth Stage Decision threshold speci ic to the sugarcane aphid Pre-Boot 20% of plants with presence of aphids Boot 20% of plants infested with 50 aphids per leaf Flowering - Milk 30% of plants infested with 50 aphids per leaf Soft Dough 30% of plants infested and localized areas with heavy honeydew and established colonies Dough 30% of plants infested and localized areas with heavy honeydew and established colonies Black Layer Heavy honeydew and established aphid colonies. Only treat to prevent harvest problems. Observe Preharvest intervals This threshold was revised from a threshold originally from Mississippi State University.
  • 6. Insecticide selection --Not labeled-- Label suspended Data: Ed Bynum and Pat Porter, 2015, Bushland
  • 7. Resistant hybrids have fewer aphids (but still too many if untreated) Data: Blayne Reed, 2015, Halfway Experiment Station
  • 8. Resistant hybrids yielded an average of 1,169 lbs./acre more than the susceptible. Market value of $126.29 at $6.05 per bushel. Data: Blayne Reed, 2015, Halfway Experiment Station
  • 9. Chemigation is Effective But Not Labeled Yet Hale Center chemigation trial with 5.0 oz of Sivanto Data: Blayne Reed, 2015, Hale Center
  • 10. Take Home • Texas High Plains requires differing action threshold • Value to host plant resistance in the Texas High Plains sorghum fields • Chemigation works! Need label…
  • 11. Next Steps • Overwintering locations and / or arrival predictions • Early Planting Trials – True IPM implementation • Overwintering predator management
  • 12. Questions? Get the latest at http://txscan.blogspot.com