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Dr. Punya Nachappa
Department of Biology
Indiana University – Purdue University Fort Wayne
Soybean Vein Necrosis Virus (SVNV) is an emerging new disease affecting soybean, first discovered in Tennessee in 2008, which has since spread to 16 other states, including Indiana. SVNV has been identified as being a new virus in the genus Tospovirus, which are typically vectored by thrips. Thrips species make up a large proportion of arthropods found in soybean fields, sometimes accounting for up to half of the arthropods collected. So far, only soybean thrips have been confirmed to transmit SVNV. However, other species of thrips are found in soybean fields, including eastern flower thrips, western flower thrips, and tobacco thrips. The relationship between pathogen, vector, and host is complicated and can result in the pathogen having a negative, positive, or neutral effect on the insect vector. Our objectives of this study include 1) to compare life history traits of a confirmed vector species, soybean thrips, to a potential vector species, eastern flower thrips and 2) to compare life history traits of viruliferous and non-viruliferous soybean thrips to determine the effect of the pathogen on its insect vector. Our results show that there is a neutral effect of SVNV infection on soybean thrips, since there is no significant difference between viruliferous and non-viruliferous soybean thrips life history traits. Life history traits studied include hatching time, number of first instars, fecundity on day 14, total offspring, development time, and juvenile survival. The differences between life history traits of vector species and non-vector or potential species may explain why soybean thrips are the only confirmed vectors of SVNV. Other species may not have the ability to transmit SVNV, or may be more negatively or positively affected by SVNV infection. Results of our research will help in developing specific management strategies for SVNV based on insect vector biology.
Biology | Life Sciences
Keough, Stacy and Shuman, Tyler, "Comparing life history traits of potential thrips vectors of Soybean Vein Necrosis Virus and the effect of virus infection on thrips vectors" (2015). 2015 IPFW Student Research and Creative Endeavor Symposium. 39.