0452 Relationship between stink bugs and Phomopsis seed decay in Mississippi soybean production
Monday, November 14, 2011: 10:27 AM
Room A18, First Floor (Reno-Sparks Convention Center)
Joshua Lunn Jones
,
Entomology and Plant Pathology, Mississippi State University, Mississippi State, MS
Angus L. Catchot
,
Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University, Mississippi State, MS
Fred Musser
,
Biochemistry, Molecular Biology, Entomology, and Plant Pathology, Mississippi State University, Mississippi State, MS
Maria Thomaso-Peterson
,
Entomology and Plant Pathology, Mississippi State University, Mississippi State, MS
Thomas W. Allen
,
Entomology and Plant Pathology, Mississippi State University, Mississippi State, MS
Jeffrey Gore
,
Delta Research and Extension Center (DREC), Mississippi State University, Stoneville, MS
Stink bugs (Hemiptera; Pentatomidae), are major pests of soybean throughout the world. Stink bugs damage soybean by penetrating the pod hulls with their piercing-sucking mouth parts and extracting nutrients from the maturing seeds. However, depriving the seeds of vital nutrients is not the only risk to soybean from stink bugs. Pod hulls that are damaged leave the seeds exposed to pathogenic organisms that can further reduce yield and quality.
The Diaporthe-Phomopsis disease complex is comprised of several fungal species that cause yield and quality loss in soybean, with the primary fungal pathogen being Phomopsis longicolla.
However, other biotic and abiotic factors either alone or in association with disease and insect pressure may also reduce seed quality.
To determine the relationship between stink bugs and seed decay in Mississippi soybean production; a survey of producer fields was conducted. Soybean seeds collected from 30 producer fields in Mississippi were divided into three categories including unblemished, damaged and stink bug damaged. Seeds were surface disinfected and plated on A-PDA. The frequency of seed-borne fungi (especially P. longicolla) was determined for each seed group. The results indicate that there is a strong relationship between seeds damaged by stink bugs and seed-borne fungi.
doi: 10.1603/ICE.2016.56370
