Reference Report for IND92068391
| Title: | Etiology of soybean severe stunt and some properties of the causal virus |
| Authors: | Weldekidan, T., Evans, T.A., Carroll, R.B., Mulrooney, R.P. |
| Source: | Plant Dis. 1992, 76(7):747-750 |
| Abstract: | Soybean severe stunt, caused by soybean severe stunt virus (SSSV), is a new virus disease affecting Delaware soybeans (Glycine max). Symptoms occur on the first true leaves, and infected plants have shortened internodes resulting in severe stunting, thickened dark green leaves, superficial stem lesions, and reduced number of flowers and pods. Soybean severe stunt occurred in 30 of 50 soybean fields surveyed in Delaware, all in Sussex County, and has not been reported elsewhere. Butanol clarification and differential centrifugation were used to purify SSSV from systemically infected leaves of soybean cv. Essex plants inoculated in the greenhouse, and Essex plants inoculated in the greenhouse with sap or purified preparation of the virus showed typical field symptoms. The isometric, multicomponent virus is approximately 29 nm in diameter and has a longevity in vitro of 12-24 hr, dilution end point of 10-3, and thermal inactivation of 55 C. The disease is transmitted via soil, and the dagger nematode (Xiphinema americanum) is strongly associated with the occurrence of the disease in the field. Antiserum to 20 isometric plant viruses has failed to react with SSSV |
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