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Student 10-Minute Presentation Competition

Plant-Insect Ecosystems

Student Competition

Student

Grad 10-min Competition: P-IE, Field Crops 2

Field evaluation of drone-based insecticide applications against redbanded stink bug (Piezodorus guildinii) in soybean

Monday, November 10, 2025
11:30 AM - 11:42 AM Pacific
Location: Oregon Convention Center, D139-140, OCC
Oral Presentation Student Competition
Redbanded stink bug (Piezodorus guildinii) (RBSB) is the most damaging insect pest of soybean in Louisiana. Majority of the soybean fields in Louisiana receive three to five average sprays to control RBSB. Sprayer drones are promising technology for aerial pesticide applications in the U.S. However, their field efficacy for insect control in field crops remains underexplored. In 2024, we conducted field experiments at the LSU AgCenter Dean Lee Research and Extension Center in Alexandria, LA to evaluate optimal drone application parameters for managing RBSB in soybean. Treatments included comparisons of nozzle types (horizontal vs. centrifugal), insecticides (pyrethroids vs. isocycloseram), flight heights (5–20 ft above canopy), spray rates (1-5 GPA), and drone versus ground-based sprayers. Results showed flight heights between 5 and 20 ft, with spray rates of 2–5 GPA, provided better spray and insecticidal efficacy. No significant differences in efficacy were observed between nozzle types, insecticides, and conventional tractor sprayers. All these experiments will be repeated in 2025. Additionally, we will include several insecticide classes for the insecticide efficacy tests.