Soybean Sentinel Plot Program September 5, 2017 Update

Reports continue to indicate low pest populations in soybean fields. Most of our fields are in R5-6 and most insect damage is not relevant after R5.
Soybean Sentinel Plot Program September 5, 2017 Update - News

Updated: April 8, 2018

The Pennsylvania Soybean Promotion Board is funding a Soybean Sentinel Plot Program, which is being managed by Penn State Extension and The Dept. of Entomology at Penn State. In this effort, Penn State Extension Educators are regularly scouting 25 or so ‘typical’ soybean fields in nineteen counties across the state, reporting the populations of plant pathogens and insect pests that they find. Our goal is to keep folks aware of pests so that they will then scout their fields as part of an IPM program. It would be imprudent to use these reports as the basis or justification for an insecticide application or including insecticides in with a post emergence herbicide application.

In the reports below, pests that were found during scouting are listed with their severity, which is rated on a 1-10 scale with 10 being the highest. A severity score of 1 equates to 10% or less infestation or defoliation, a “2” aligns with 20% or less infestation or defoliation, and so on. Growers should be sure to check their own fields to determine your local populations, but these reports will give you a sense of what pests are active in fields. Our reports are distributed via this weekly newsletter, Penn State’s Field Crop News, and will be available in the next day or two on Penn State’s Field Crop Entomology website.

Reports

September 2, 2017 – Kersey – Mellissa Rathbun

Growth Stage: R6

  • Frogeye leaf spot: severity- .5
  • Bacterial leaf blight: severity-1
  • Grasshopper: severity- .5
  • Potato leaf hopper: severity- .5
  • Green Stink Bug: severity- 1
  • Japense Beetle: severity- 1
  • Lady beetle: present

September 2, 2017 – Brockway – Mellissa Rathbun

Growth Stage: R5

  • Frogeye leaf spot: severity .5
  • Bacterial leaf blight: severity-1
  • Green Stink Bug: severity- 1
  • Grasshopper: severity-1
  • Bean leaf beetle: severity-1

September 5, 2017 – Crawford – Joel Hunter

Growth Stage: R6-Full Seed

  • Septoria glycines (brown spot) 1- slight
  • Downy Mildew – 1 slight.
  • Grass hopper, Japanese beetle, and aphids all 1- slight.

September 1, 2017 – Clinton Co - Mill Hall – Don Woodring

Growth Stage: R5

  • Green cloverworm – Severity 3
  • Grasshopper – Severity 3
  • Bean leaf beetle – Severity 1
  • Green stinkbug – Severity 1
  • Soybean aphid – Present
  • Soybean looper – Present

Beneficials:

  • Lady beetle

Disease:

  • Sclerotinia stem rot (white mold) – Severity 1

September 1, 2017 – Clinton Co - Eastville – Don Woodring

Growth Stage: R6

  • Grasshopper – Severity 3
  • Bean leaf beetle – Severity 1
  • Green cloverworm – Severity 2
  • Brown stinkbug – Present
  • Green stinkbug ­– Severity 2
  • Soybean aphid ­– Severity 2

Beneficials:

  • Lady beetle ­– Well established - 3

Disease:

  • Sclerotinia stem rot (white mold) – Severity 2

August 30, 2017 – Stewartstown-South – John Rowehl

Growth Stage: R6
Damage Level = 2

  • Insect Pests found
  • Mexican Bean Beetle
  • Grasshoppers
  • Japanese Beetles

Disease:

  • Sudden Death Syndrome

August 30, 2017 – Stewartstown-East – John Rowehl

Growth Stage: R5/R6
Damage Level = 1
Insect Pests found

  • Grass hoppers
  • Japanese Beetles
  • Bean Leaf Beetle
  • Mexican Bean Beetles
  • Brown Marmorated Stink Bug
  • Green Stink Bug
  • Cucumber Beetles
  • Green Clover Worms
  • Silver Spotted Skipper worms

Diseases

  • Brown spot and or Cercospora (sp)

August 30, 2017 – Windsor – John Rowehl

Growth Stage: R6
Damage Level = 1
Insect Pests found

  • Silver Spotted Skippers
  • Grasshoppers
  • Brown Marmorated Stink Bug
  • Mexican Bean Beetles
  • Green Stink Bug
  • Green Clover worm

Diseases

  • Frog eye
  • Brown spot

September 1, 2017 – Cambira Co - Loretto – Zachary Larson

Growth Stage: R6

  • Bean leaf beetle – 1
  • Bacterial blight – 1
  • Frogeye leaf spot – 2
  • Brown spot – 1
  • Grasshoppers - 1

September 5, 2017 – Columbia Co – Joel Imgrund

Growth Stage: R6

  • Grasshoppers - severity 3
  • PLH - severity 1
  • Aphids - severity 1
  • Frog-eye - severity 4

September 5, 2017 – Northumberland Co – Joel Imgrund

Growth Stage: R6

  • Jap beetle - 1
  • Grasshoppers - 2
  • Aphids - 1
  • Clover worm - 1
  • Downy - 1
  • Frogeye- 1

September 5, 2017 – Union Co – Joel Imgrund

Growth Stage: R6

  • Grasshoppers - 5
  • Skipper - 1
  • Downy - 1
  • Frog-eye 1

Authors

Insect ecology Plant-insect interactions Conservation biological control Chemical ecology Gall insects

More by John Tooker, Ph.D.