HCS Seminar Series: Screening for resistance and modes of virulence in soybean; Brown Marmorated Stinkbug interactions

Apr 13, 2016, 11:30am - 12:30pm
Video link 244 Kottman Hall and 121 Fisher Auditorium
Halyomorpha halys, brown marmorated stinkbug (BMSB). is a native insect of Korea, Japan, and
China. In 1996, BMSB was introduced to North America and has quickly become a noxious agricultural pest. In
nearly 20 years, BMSB populations have steadily increased and are now high enough in the mid-Atlantic region to
significantly reduced yield and create substantial economic losses to a wide range of plants and crops; including
soybeans, corn, apples, grapes, vegetables. and several horticultural tree species. As of 2015. BMSB has been
detected in 42 states and is a severe agricultural pest in nine states. On soybeans. BMSB feeding damage ranges
from puncture marks with seed discoloration and deformities to seed and pod abortion. In 2011 , U.S. producers
grew 30.3 million hectares of soybeans with a market value of 36 billion dollars. Ohio is one of the nation's leading
producers of conventional (non-GMO). food-grade soybeans grown tor tofu. a high value product where seed
damage or discoloration is unacceptable. Over the past two years. my lab has developed methods to rear BMSB,
screen soybean germplasm and evaluate host plant resistance. Results from choice and no-choice tests indicate
high levels of susceptibility in commercial varieties. however. several sources of resistance have been identified in
plant introduction screening. High broad-sense heritability estimates (H2 =O. 70) indicate that resistance
characteristics are largely a result of genetic factors and can be introgressed into high yielding varieties. No-choice
tests revealed pod maturity effects susceptibility and may implicate pod wall thickness or components as a
mechanical barrier to stylet penetration. our results also suggest aphid resistance may enhanced BMSB
susceptibility. In addition. preliminary evidence from interrogation of the BMSB microbiome will be discussed.