Biology of the Two-Spotted Spider Mite on Strawberry Plants.

L B Monteiro,E D B Da Silva,T M A Kuhn,A F Mogor

doi:10.1007/s13744-013-0184-7

L B Monteiro, E D B Da Silva + Show 2 more

Open Access

https://doi.org/10.1007/s13744-013-0184-7

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Journal: Neotropical entomology	Publication Date: Jan 11, 2014
Citations: 17	License type: CC BY 2.0

Affiliation: Federal University of Paraná

Abstract

The two-spotted spider mite, Tetranychus urticae Koch, is commonly found on strawberry crops (Fragaria x ananassa). Strawberry plants have defensive mechanisms, which in turn influence the behavior of herbivores. The oviposition and development of the two-spotted spider mite were evaluated on the leaf disks of the cultivars ‘Aromas,’ ‘Camarosa,’ ‘Camino Real,’ ‘Diamante,’ ‘Diamante 10,’ ‘Diamante 50,’ ‘Festival,’ and ‘Seascape.’ It was observed that on cultivars such as ‘Aromas,’ ‘Camarosa,’ and ‘Seascape,’ immature survivorship was higher, but no difference was found during the developmental period from egg to adult of T. urticae. The immature development time was also longer on ‘Camarosa.’ Females laid more eggs on ‘Seascape’ (8.4 eggs/day), and the least on ‘Camarosa’ (1.0 egg/day). Mortality was higher at the larval stage and reached more than 50% in three cultivars ‘Camarosa,’ ‘Diamante,’ and ‘Seascape.’ Thus, the cultivars ‘Camarosa,’ ‘Diamante,’ and ‘Seascape’ were the ones that mostly affected the survival, development, and reproduction of T. urticae.

Highlights

The breeding process of a given cultivar influences several metabolic and morphological mechanisms of resistance in the search for plants with high productivity and quality fruits
Even though the majority have explored the relationships between constituent and induced resistance (Gianoli 2002, Traw 2002, Fadini et al 2004), some have evaluated the effect of plant resistance on the fitness and behavior of herbivores (Thaler & Karban 1997, Underwood & Rausher 2000)
The two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), is a cosmopolitan, polyphagous species, and it is a pest of strawberry crops

Summary

Introduction

The breeding process of a given cultivar influences several metabolic and morphological mechanisms of resistance in the search for plants with high productivity and quality fruits. We evaluated the development and reproduction of two-spotted spider mite on eight strawberry cultivars under laboratory conditions. Egg laying of individual 24-h-old mated females were assessed for 6 h on each of the 50 leaf disks of each strawberry cultivar and the control plant (P. vulgaris).

Results

Conclusion