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The influence of plant fertilisation regime on plant-aphid-parasitoid interactions

Jansson, Johanna (2003). The influence of plant fertilisation regime on plant-aphid-parasitoid interactions. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae. Agraria, 1401-6249 ; 415
ISBN 91-576-6441-2
[Doctoral thesis]

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This thesis examines effects of plant fertilisation regime on herbivore and parasitoid performance for two aphids, Macrosiphum euphorbiae and Myzus persicae, and one parasitoid wasp, Aphidius ervi. Herbivore performance was measured as adult fresh weight and intrinsic rate of increase. Parasitoid performance was measured as length of hind tibia, sex ratio, and in a series of choice experiments also parasitoid development time and parasitization rate was measured. Comparisons were made between the performance of M. euphorbiae on two different plant species, petunia and sweet pepper, between the performance of the aphids M. euphorbiae and M. persicae on sweet pepper, and between the performance of A. ervi in M. euphorbiae and in M. persicae on sweet pepper. The performance of M. euphorbiae was better on petunia than on sweet pepper. On petunia a positive effect of plant content of potassium and indications of a positive effect of nitrogen fertilisation were found while on sweet pepper both nitrogen and of potassium had negative influence. On both plant species, however, a negative influence of sulphur was found. The two aphid species reacted differently to fertilisation and plant content of nutrients. For M. euphorbiae fresh weight was decreased by fertilisation while for M. persicae the influence varied with experiment. For M. persicae a high N:K ratio was favourable while for M. euphorbiae plant contents of N and K were both negative. Plant content of sulphur and potassium influenced tibia length of A. ervi positively in M. euphorbiae. In M. persicae plant fertilisation was positive but the composition of the plant fertilisation did not seem important for the parasitoid. Plant fertilisation enhanced parasitization rate in M. euphorbiae but not in M. persicae. Parasitoid performance was, however, more improved by fertilisation in M. persicae than in M. euphorbiae. The parasitoid both preferred, and developed faster in, M. persicae compared to M. euphorbiae. The results of this study show that it is possible to influence both aphid performance and performance of A. ervi with plant fertilisation but the influence varies with both plant and aphid species.

Authors/Creators:Jansson, Johanna
Title:The influence of plant fertilisation regime on plant-aphid-parasitoid interactions
Series Name/Journal:Acta Universitatis Agriculturae Sueciae. Agraria
Year of publishing :September 2003
Number of Pages:29
ALLI. Jansson, J. & Ekbom, B. 2002. The effect of different plant nutrient regimes on the aphid Macrosiphum euphorbiae growing on petunia. Entomologia Experimentalis et Applicata 104, 109-116. II. Jansson, J. & Ekbom, B. The influence of sweet pepper plant nutrient regime on the performance of the aphid Macrosiphum euphorbiae and its natural enemy Aphidius ervi. (Submitted Manuscript). III. Jansson, J. The influence of sweet pepper plant nutrient regime on the performance of the aphid Myzus persicae and its natural enemy Aphidius ervi. (Manuscript). IV. Abugor, I., Jansson, J. & Ekbom, B. Preference and performance of a parasitic wasp on two species of aphids feeding on plants with different fertilisation levels. (Manuscript).
Place of Publication:Uppsala
Associated Programs and Other Stakeholders:Z - SLU - Library > Odla mera
ISBN for printed version:91-576-6441-2
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:H Protection of plants and stored products > H20 Plant diseases
H Protection of plants and stored products > H10 Pests of plants
Subjects:Not in use, please see Agris categories
Agrovoc terms:petunia, capsicum annuum, plant condition, parasitoids, plant diseases, biological control, herbivores
Keywords:Petunia axillaris hybrida, Capsicum annuum, tritrophic interactions, Plant quality, host quality, insect performance, biological control
Permanent URL:
ID Code:358
Department:(NL, NJ) > Dept. of Entomology (until 061231)
Deposited By: Johanna Jansson
Deposited On:18 Sep 2003 00:00
Metadata Last Modified:22 Mar 2015 15:12

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