2021
How long do insecticide applications provide effective control of soybean pests (Year 2)
Home
Contributor/Checkoff:
Illinois Soybean Association
Category:
Sustainable Production
Keywords:
Biotic stressCrop protectionField management Pest
Parent Project:
How long do insecticide applications provide effective control of soybean pests
Lead Principal Investigator:
Nick Seiter, University of Illinois at Urbana-Champaign
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
Illinois Soybean Association
$24,318
Institution Funded:
University of Illinois at Urbana-Champaign
$24,318
Brief Project Summary:

Insecticide residual activity can vary depending on several factors including the particular insecticide material, the susceptibility of the insect species to the material, and weather conditions. Understanding the nature of residual activity is essential to making an effective control decision. In this project, researchers will determine the duration of control provided by commonly used foliar insecticides for major insect pests (stink bugs, bean leaf beetles, Japanese beetles, and green cloverworm) when exposed to field conditions. They will also develop a web-based platform to make this information available to farmers and crop advisors to help inform management decisions in Illinois soybean fields.

Key Benefactors:
farmers, applicators, agronomists, extension specialists

Information And Results
Project Deliverables

Proposed Methods
A series of small-plot insecticide efficacy trials will be conducted at various locations in Illinois. These trials will be located in soybean fields (at University of Illinois research farms and/or on commercial soybean fields) that are experiencing a damaging infestation of one or more insect pests. Once spray applications are made, insect population densities will be assessed in the field at a minimum of three, seven, and ten days post-application, with additional intervals measured whenever feasible. In addition, soybean foliage (defoliating insects) or pods (stink bugs) will be collected, brought to the laboratory, and placed on benzamidazole-agar media (this prevents the plant tissues from wilting) in petri dishes. Pest insects (bean leaf beetles, Japanese beetles, and/or green cloverworm larvae) will be introduced to this insecticide-treated foliage, and mortality will be observed after 24 hours of exposure. Similar bioassays will be conducted on stink bugs; however, these insects will be exposed to insecticide-treated pods by caging them on pods in the field post-application. These bioassays will be conducted until all insecticide-treated material no longer results in mortality of the insects. We will conduct four of these experiments during summer of 2020, with each one testing mortality of at least one of our target pests. We are seeking continued funding for 2021 to repeat these studies across multiple growing seasons and environmental conditions, and would plan to seek a third year of funding the following year (FY 2022). University of Illinois Extension is currently expanding its online educational offerings, including the planned launch of “CropCentral,” a multi-media web resource that will house interdisciplinary management recommendations for crop production. An applied database of the results obtained through this project will be developed into this resource to inform clientele.

Timeline
Sept. 2019-present: Protocol development, cage construction (Year 1 funding; ongoing)
May 2020-Aug. 2020: Conduct four insecticide residual experiments (Year 1 funding)
Sept. 2020-Apr. 2021: Summarize results from 2020 field season. Discuss results during winter Extension meetings and webinars. Begin construction of web-based insecticide residual database. (proposed funding)
May-Aug. 2021: Conduct four insecticide residual experiments (proposed funding)

Final Project Results

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.