Anais da Sociedade Entomológica do Brasil (2000) 29, 339-346

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A.L. Lourencao, G.J. Moraes, F.A. Passos, G.M.B. Ambrosano and L.V.F. Silva (2000)
Resistência de morangueiros a Tetranychus urticae Koch (Acari: Tetranychidae)
[Resistance of strawberries to Tetranychus urticae Koch (Acari: Tetranychidae)]
Anais da Sociedade Entomológica do Brasil 29 (2), 339-346
Abstract: The performance of eighteen strawberry clones was evaluated in relation to resistance to the two-spotted spider mite Tetranychus urticae Koch. In greenhouse, plants of lineage T-0104 and cultivars 'Blakemore', 'Raritan' and 'IAC Princesa Isabel' had significantly lighter damage symptoms than cultivars 'Cruz' and 'Oso Grand '; under the same conditions, the number of mites per unit area was significantly lower on 'IAC Princesa Isabel' than in 'Cruz', 'Dover' or 'Fern'. In a no-choice experiment conducted in the laboratory, the average daily oviposition was similar in the different cultivars; although a tendency for lower oviposition was observed on 'IAC Campinas' than on
'Floridabelle', 'Oso Grande' and 'Toyonoka'. An apparent preference of T. urticae for 'IAC Guarani' in relation to 'Floridabelle', 'IAC Campinas' and 'New Jersey 7335-5' was observed in a laboratory multiple-choice experiment involving clones with the highest and lowest oviposition rates in the previous test. Only 'IAC Guarani' of the Brazilian cultivars included in the present work was susceptible to T. urticae, whereas 'IAC Campinas' and 'IAC Princesa Isabel' seem to have levels of resistance similar to the best cultivars developed for this purpose.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Database assignments for author(s): André Luiz Lourencao

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Tetranychus urticae Strawberry (Fragaria)