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Oral Presentation
Oral Presentation
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Poster Display
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Student Competition
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Ticketed Event

Student Poster Display Competition

Plant-Insect Ecosystems

Student Competition

Student

Grad Poster Competition: P-IE, IPM 2

D3104: Influence of maturity groups and planting dates on soybean insect pests in Missouri

Monday, November 10, 2025
9:00 AM - 5:00 PM Pacific
Location: Exhibit Hall A-A1, OCC
Poster Display Student Competition
Planting date (PD) and maturity group (MG) are agronomic practices that can influence soybean yield potential and insect pest dynamics throughout the growing season. Early planting is often associated with reduced populations of key pests such as stink bugs, while later planting can increase exposure to higher pest densities. Similarly, MGs may influence plant phenology and exposure to herbivorous insects. This study aims to evaluate how PD and MG affect the abundance of insect pests in soybean fields across Missouri. Field experiments are being conducted at the University of Missouri research farms in Novelty, Columbia, and Mount Vernon. Each location includes three PDs (April, May, June) and three MGs (3.0, 3.7, 4.2), arranged in a split-plot randomized complete block design. Plots are 20 feet wide × 80 feet long and have 8 rows (30-inch spacing). Soybean seeds were planted at approximately 140,000 plants/acre. Insect sampling will occur weekly from V4 to R6 growth stages using a 38-cm sweep net. A total of 30 sweeps per plot will be performed in the central rows of each plot. A generalized linear mixed model (GLMM) will be fitted using the glmmTMB package in R. We expect insect pest abundance to be higher in late-planted soybeans and to vary among MGs. These insights will improve IPM strategies by identifying PD/MG combinations that can avoid high insect pest abundance.