Efficacy of insect growth regulators on Lepidopteran pest of soybean

Monday, November 14, 2022

8:24 AM – 8:36 AM PT

Location: Vancouver Convention Centre, Meeting Room 208/209

Presenting Author(s)

SH

Sawyer Hopkins

Mississippi State University
Stoneville, Mississippi

Co-Author(s)

WC

Whitney Crow

Mississippi State University
Cleveland, Mississippi
DC

Don Cook

Entomologist
Mississippi State University
Stoneville, Mississippi
JG

Jeffrey Gore

Mississippi State University
Stoneville, Mississippi
AC

Angus Catchot

Mississippi State University
Mississippi State, Mississippi

Co-application of an insect growth regulator insecticide and fungicide in soybean at the R3 to R4 growth stage is not uncommon in Mississippi. There are a few different insect growth regulators on the market which include diflubenzuron, novaluron, and methoxyfenozide. Diflubenzuron and novaluron inhibit chitin formation, while methoxyfenozide acts on the molting process of immature growth stages. The impact of these insect growth regulator applications on pest and beneficial insects and the economic benefits to soybean production have not been thoroughly investigated. The objective of this study is to determine the impact of selected insect growth regulators on insect pest infestations and soybean yield.