| Autor: |
Wolf, S. P., Bowen, K. L., Mack, T. P. |
| Zdroj: |
Journal of Economic Entomology; October 1997, Vol. 90 Issue: 5 p1341-1341, 1p |
| Abstrakt: |
Studies were done on both greenhouse- and field-grown peanuts to determine if feeding on the root-hypocotyl region of the plant by the lesser cornstalk borer, Elasmopalpus lignosellus (Zeller), augments the occurrence of southern stem rot caused by Sclerotium rolfsii Saccardo. Peanuts were grown in the greenhouse with and without infestation with S. rolfsii sclerotia and E. lignosellus larvae. Only plants grown in soil infested with sclerotia developed southern stem rot; all plants infested with lesser cornstalk borer larvae were damaged at the root-hypocotyl region. Southern stem rot incidence was consistently greatest in the plants infested with both sclerotia and larvae. In addition, lesser cornstalk borer damage to the root-hypocotyl region of peanut plants was simulated in the field for 7 consecutive weeks (treatment dates) in 1993 and for 8 weeks in 1994. Each artificially damaged plant was paired with an adjacent undamaged plant control. Fifty pairs of plants were damaged each week. Incidence of southern stem rot was assessed at the end of the growing season and was consistently greater in damaged plants than in undamaged plants. These results indicate that damage to peanut plants, such as that caused by feeding of the lesser cornstalk borer, increases the occurrence of southern stem rot. |
| Databáze: |
Supplemental Index |
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