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Sentinel Plot Program in Soybeans

Posted: July 17, 2012

Readers may recall that the Pennsylvania Soybean Board is funding a Sentinel Plot Program, which is being managed by Penn State Extension and The Dept. of Entomology.

Readers may recall that the Pennsylvania Soybean Board is funding a Sentinel Plot Program, which is being managed by Penn State Extension and The Dept. of Entomology. In this effort, Penn State Extension Educators are regularly scouting fifteen ‘typical’ soybean fields across the state, reporting significant populations of plant pathogens and insect pests. For more details on this effort, see a previous article (http://extension.psu.edu/field-crop-news/archives/2012/june-26). For all the reports thus far, see Penn State’s Field Crop Entomology website (http://ento.psu.edu/extension/field-crops-new). 

Reports from the past week indicate that insect and disease populations remain low.  Pests being reported include potato leafhoppers, green cloverworm, and grasshoppers.  Just one plot report any disease: Phytophthora root & stem rot in Lebanon County. Pests that were found during scouting are listed with their severity, which is rated on a 1-10 scale with 10 being the highest.

Berks County - 12 July 2012

Combined report from 2 fields
Growth stage: V4 in one field, R2.5 in the other

  • Bean leaf beetle present – Severity: 1
  • Potato leafhopper active – Severity: 1
  • Two-spotted spider mites active – Severity: 1
  • Green cloverworm active – Severity: 1-5
  • Japanese beetles active - Severity: 1
  • Grasshoppers active – Severity: 2
  • Lady beetles, damsel bugs, spiders (beneficial predators) common

 

Lebanon County - 12 July 2012

Growth stage: R1

Field 1

  • Potato leafhopper active – Severity: 2
  • Green cloverworm active – Severity: 2
  • Soybean aphid present - Severity: 3
  • Japanese beetles active - Severity: 2
  • Grasshoppers active – Severity: 1
  • Lady beetles, damsel bugs (beneficial predators) active
  • No diseases found

Field 2

  • Mexican bean beetle – Severity: 1
  • Silver-spotted skipper caterpillars – Severity: 4
  • Potato leafhopper active – Severity: 5
  • Green cloverworm active – Severity: 3
  • Soybean aphid present - Severity: 3
  • Brown marmorated stink bug present – Severity: 2
  • Grasshoppers active – Severity: 7
  • Velvetbean caterpillar – Severity: 2
  • Lady beetles, Orius damsel bugs (beneficial predators) active
  • Bumble bees, carpenter bees active
  • Phytophthora root & stem rot – Severity: 4

 

Lancaster County - 11 July 2012

Growth stage: R2
Combined report from all three fields

  • Bean leaf beetle present – Severity: 1
  • Mexican bean beetle present – Severity: 1
  • Greenclover worm present – Severity: 1-3
  • Potato leafhopper active – Severity: 2
  • Japanese beetles active - Severity: 1-2
  • Grasshoppers active – Severity: 1-3
  • No diseases found

 

Montgomery County - 10 July 2012

Growth stage: R1-2

  • Beans are drought stressed
  • Grasshoppers active – Severity: 2
  • No diseases found

 

Crawford County 10 July 2012

Growth stage: R1-2

  • No insects or diseases found

 

Tioga County - 2 July 2012

  • Potato leafhoppers active - Severity: 1
  • No insects or diseases found

 

Contact Information

John Tooker
  • Extension Specialist
Phone: 814-865-7082