Interactions between endophyte (Neotyphodiumspp.) and ploidy in hybrid and perennial ryegrass cultivars and their effects on Argentine stem weevil (Listronotus bonariensis)
| Autor: | Alison J. Popay, David E. Hume, K. L. Davis, B. A. Tapper |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | New Zealand Journal of Agricultural Research. 46:311-319 |
| ISSN: | 1175-8775 0028-8233 |
| Popis: | Argentine stem weevil damage was assessed in 1998 and 1999 on two diploid perennial ryegrasses (cvs. ‘Yatsyn’ and ‘Samson'), a diploid long‐rotation hybrid ryegrass (cv. ‘Marsden'), a tetraploid perennial ryegrass selection ('4N') and in a tetraploid hybrid (cv. ‘Greenstone') in a field trial in Taranaki. ‘Greenstone’ was infected with a selected Neotyphodium endophyte that produces peramine and ergovaline but not lolitrem B. All other cultivars were naturally infected with endophytes that produce all three alkaloids. In the first year, percent endophyte infection levels were low in ‘Greenstone’ (61%), ‘Marsden’ (70%) and ‘4N’ (71%) relative to ‘Yatsyn’ (85%) and ‘Samson’ (86%), but increased in the second year to greater than 88% in all cultivars. Argentine stem weevil adult feeding and larval damage were greatest on ‘Greenstone’ and least on ‘Yatsyn’ and ‘Samson’ in both years. ‘Greenstone’ tillers damaged by larvae were more severely affected than tillers of other cultivars. Individually and i... |
| Databáze: | OpenAIRE |
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