Host status of tropical spiderwort (Commelina benghalensis) for nematodes
| Autor: | R. F. Davis, Theodore M. Webster, Timothy B. Brenneman |
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| Rok vydání: | 2006 |
| Předmět: | |
| Zdroj: | Weed Science. 54:1137-1141 |
| ISSN: | 1550-2759 0043-1745 |
| Popis: | Nematodes are the most damaging pathogens of cotton and one of the most important pathogens of peanut. Weeds can support nematode reproduction and reduce the effectiveness of crop rotation as a management tool. This study documents the relative host status of tropical spiderwort for (1) the reniform nematode and the southern and peanut root-knot nematodes and (2) the fungal pathogen southern stem rot. A reproductive factor (RF) was calculated for each nematode (final number divided by initial number). Galling was estimated (0–10 scale) for the root-knot species. The southern root-knot nematode reproduced well on tropical spiderwort, with a gall rating of 3.1 and an RF of 15.5. The peanut root-knot nematode also reproduced well on tropical spiderwort, with a gall rating of 2.1 and an RF of 7.2. Trials with the reniform nematode were analyzed independently. In the first trial with the reniform nematode, the RF was 2.4 on tropical spiderwort and 1.4 on cotton. In the second trial, the RF was 3.6 on ... |
| Databáze: | OpenAIRE |
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