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Interaction between greenhouse grown chrysanthemum and Frankliniella occidentalis

a modelling approach

Nothnagl, Margit (2006). Interaction between greenhouse grown chrysanthemum and Frankliniella occidentalis. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2006:97
ISBN 91-576-7146-X
[Doctoral thesis]

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Growers of floricultural crops are still dependent on chemical insecticides because of low consumer tolerance to damaged produce. More knowledge of natural interactions between insects and their host plants would allow insect pests to be controlled in a more environmentally friendly and effective way. This thesis analysed the system of biological interaction between the pest Frankliniella occidentalis (Western Flower Thrips) and its host plant Chrysanthemum x morifolium. Mathematical prediction models were developed to describe the growth and development processes of the plant and the insect population, on the assumption that there is a temperature-dependent interaction between flower growth and development and thrips population growth. An introductory study developed a method for linking flower growth and development that was used in subsequent studies. The second study aimed to predict growth responses of non-infested chrysanthemum flowers to temperature and irradiation, in order to distinguish between temperature and thrips effects on chrysanthemum flower size. Since F. occidentalis feeds on both flowers and leaves, a model constructed in the third study served as a prediction tool for food and habitat distribution for the thrips. By recording the final leaf length, leaf area distribution during the growing period could be re-constructed. The model was later included in the large population growth model as a leaf canopy model. The effect of three temperature regimes on early population growth of F.occidentalis was investigated in detail. The results showed that the observed rapid increase in population size could not be correlated with flower opening. The relative reproduction rate of F. occidentalis changed exponentially, probably depending on changes in population density and different reproductive strategies. Therefore, in a final model, population density played an important role during early population growth, whereas a decrease in food supply, in terms of damaged leaf area, controlled population decline at the end of the growth period. At lower temperatures (approx. 20˚C), the population decline could be simulated by simply manipulating food supply, while at higher temperatures (approx. 26˚C), the model underestimated population decline, indicating the need for a stress or migration factor in the system.

Authors/Creators:Nothnagl, Margit
Title:Interaction between greenhouse grown chrysanthemum and Frankliniella occidentalis
Subtitle:a modelling approach
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2006
Number of Pages:41
ALLI. Larsen, R.U., Birgersson, A., Nothnagl, M. & Karlén, H. 1998. Modelling temperature and flower bud growth in November cactus (Schlumbergera truncata, Haw.). Scientia Horticulturae 76, 193-203. II. Nothnagl, M., Kosiba, A. & Larsen, R.U. 2004. Predicting the effect of irradiance and temperature on the flower diameter of greenhouse grown chrysanthemum. Scientia Horticulturae 99, 319-329. III. Larsen, R.U. & Nothnagl, M. 2006. Re-constructing data of leaf area distribution over time in the greenhouse pot chrysanthemum cultivar ‘Lompoc’. Manuscript. IV. Nothnagl, M., Kosiba, A., Alsanius, B.W., Anderson, P. & Larsen, R.U. 2006. Analysis of early population growth of Frankliniella occidentalis Pergande (Thysanoptera: Thripidae) on greenhouse grown chrysanthemum. Submitted manuscript. V. Nothnagl, M., Kosiba, A., Alsanius, B.W., Anderson, P. & Larsen, R.U. 2006. Modelling population dynamics of Frankliniella occidentalis Pergande (Thysanoptera: Thripidae) on greenhouse grown chrysanthemum. Submitted manuscript.
Place of Publication:Alnarp
Associated Programs and Other Stakeholders:Z - SLU - Library > Odla mera
ISBN for printed version:91-576-7146-X
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:chrysanthemum, frankliniella occidentalis, host parasite relations, pests of plants, greenhouses, mathematical models, population growth, population density, reproductive performance, temperature
Keywords:biological interactions, floriculture, greenhouse production, growth analysis, IPM (Integrated Pest Management), simulation.
Permanent URL:
ID Code:1226
Department:?? 4806 ??
Deposited By: Margit Nothnagl
Deposited On:24 Oct 2006 00:00
Metadata Last Modified:22 Mar 2015 15:12

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