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Meet the Speakers
About this Session
Reevaluation of Fertilizer Recommendations for Soybean Production in Louisiana
Presented by: Dr. Rasel Parvej, PhD
Assistant Professor & Soil Fertility Specialist, Louisiana State University AgCenter, Scott Research & Extension Center, Macon Ridge Research Station
Most land-grant universities have developed fertilizer-P and K recommendations based on topsoil (0- to 4-, 0- to 6-, or 0- to 8-inch depth) P and K availabilities. Although topsoil-based fertilizer recommendations are fairly accurate for soybean production across a range of soil types, it sometimes gives false positive error i.e., soil-test results indicate a positive yield response to fertilization but in fact it does not occur. This may be due to a small amount of subsoil-P and K availabilities at 6-12-inch or deeper depth that soybean roots can easily access and fulfill both P and K need and resulting in no yield response to added fertilizer. Therefore, both topsoil and subsoil nutrient availabilities need to be considered to develop better fertilizer recommendations for soybean production in Louisiana. We reevaluated soybean yield response to five different fertilizer-P (0, 30, 60, 90, and 120 lb P2O5 acre-1) and K (0, 40, 80, 120, and 160 lb K2O acre-1) rates and two different soil-P and K concentrations from 0- to 6- and 0- to 12-inch depths across 14 sites in Louisiana. The results will be presented in meeting. This study will be continued in 2021 and 2022.
Redbanded Stink Bugs: A Louisiana Perspective and Management Tactics
Presented by: Dr. Sebe Brown
Research & Extension Field Crops Entomologist, LSU AgCenter
Redbanded stink bugs (RBSB) are the most economically important insect pest in Louisiana soybeans. RBSB can outcompete and cause more seed yield and quality losses than native stink bugs. Management tactics utilized by Louisiana agricultural professionals, against RBSB, have constantly evolved since the stink bug’s introduction to Louisiana in 1999. This presentation will address the RBSB’s biology, mechanisms for injury, control tactics and management considerations in Louisiana.