Effects of new cultivars of ninebark on feeding and ovipositional behavior of the specialist ninebark beetle, Calligrapha spiraeae (Coleoptera: Chrysomelidae)

Emily G. Tenczar, Vera A. Krischik

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Two newly developed cultivars of ninebark [Physocarpus opulifolius (L.) Maxim.], a yellow-leaved cultivar called 'Dart's Gold' and a purple-leaved cultivar called 'Monlo', were compared with the native for resistance to feeding and oviposition by the specialist ninebark beetle [Calligrapha spiraeae (Say)]. When offered the choice between two types of ninebark, beetles statistically preferred native (P < 0.0001) and 'Dart's Gold' (P < 0.0001) over 'Monlo', but showed no preference between native and 'Dart's Gold' (P = 0.0743). Long-term performance bioassays showed significantly more eggs on 'Dart's Gold' than 'Monlo' (P = 0.0468). 'Monlo' contained the most anthoeyanins (P < 0.0001) and chlorophyll B (P < 0.0001) and the least total nitrogen (P = 0.0283) and Kjeldahl nitrogen (P = 0.0014). Anthoeyanins are known to act as feeding deterrents and bind with nitrogen, which may explain why beetles avoided feeding on 'Monlo' in preference tests.

Original languageEnglish (US)
Pages (from-to)1396-1399
Number of pages4
JournalHortScience
Volume42
Issue number6
DOIs
StatePublished - Oct 2007

Keywords

  • Anthoeyanins
  • Pest management
  • Physocarpus opulifolius
  • Resistance

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