Share

Sentinel Plot Program in Soybeans

Posted: July 3, 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.

 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 last week’s article. For all the reports thus far, see Penn State’s Field Crop Entomology website.

Reports from the past week indicate that insect and disease populations remain low. Pests being reported include potato leafhoppers, bean leaf beetle, grasshoppers, Japanese beetles, and just one mention of Septoria brown spot. Pests that were found during scouting are listed with their severity, which is rated on a 1–10 scale with 10 being the highest.

3 July 2012 - Lancaster County
Combined report from three fields
Growth stage: R1

  • Bean leaf beetle feeding evident - Severity: 1
  • Mexican bean beetle present - Severity: 1
  • Japanese beetles active with typical feeding signs - Severity ranging from 1 to 3 depending on the field
  • Green cloverworm active - Severity: 1
  • Grasshoppers active - Severity: 1
  • No diseases found

3 July 2012 - Dauphin County
Growth stage: V6-8

  • Potato leafhoppers active - Severity: 3
  • Japanese beetles active - Severity: 1
  • Soybean aphid present - Severity: 1
  • Grasshoppers active - Severity: 1
  • No diseases found

2 July 2012 - Franklin County
Growth stage: V3-4

  • Grasshoppers active - Severity: 1
  • Septoria brown spot - Severity: 1

29 June 2012 - Berks County (two fields)
Field 1 - Growth stage V7

  • Bean leaf beetle feeding evident - Severity: 1
  • Potato leafhopper active - Severity: 1
  • Green cloverworm active - Severity: 1
  • Japanese beetles active - Severity: 1
  • No diseases found

Field 2 - Growth stage V7

  • Bean leaf beetle feeding evident - Severity: 1
  • Potato leafhopper active - Severity: 1
  • Green cloverworm active - Severity: 1
  • Japanese beetles active - Severity: 1
  • Grasshoppers active - Severity: 1

28 June 2012 - York County
Growth stage: V7

  • Potato leafhoppers active - Severity: 3
  • No diseases found

27 June 2012 - Lancaster County
Combined report from three fields
Growth stage: R1

  • Bean leaf beetle feeding evident - Severity: 1
  • Mexican bean beetle present - Severity: 1
  • Silver spotted skipper - Severity: 1
  • Japanese beetles active with typical feeding signs - Severity ranging from 1 to 3 depending on the field
  • Green cloverworm active - Severity: 1
  • Grasshoppers active - Severity: 1
  • No diseases found

25 June 2012 - Dauphin County
Growth stage: V3

  • Potato leafhoppers active, Severity: 2
  • Slugs active - Severity ranges from 1 to 5 depending on portion of the field considered
  • No diseases found

Contact Information

John Tooker
  • PSU Entomology Specialist