Migration and early population development of aphids (Hemiptera: Aphididae) in winter cereals [Elektronische Ressource] / A. Michael Klüken

Michael Klueken

Informations

• Publié par: gottfried_wilhelm_leibniz_universitat_hannover
• Publié le: 01 janvier 2008
• Nombre de lectures: 53
• Langue: Deutsch
• Poids de l'ouvrage: 2 Mo

Extrait

Migration and early population development of
aphids (Hemiptera: Aphididae) in winter cereals


Von der Naturwissenschaftlichen Fakultät
der Gottfried Wilhelm Leibniz Universität Hannover
zur Erlangung des akademischen Grades

Doktor der Gartenbauwissenschaften
Dr. rer. hort.

genehmigte Dissertation von
Dipl.-Ing. agr. A. Michael Klüken, geboren am 15.09.1973 in Krefeld
Hannover, Januar 2008






















1. Referent: Prof. Dr. B. Hau

2. Referent: Prof. Dr. B. Freier

Tag der Promotion (mündlichen Prüfung): 27.02.2008







Soli Dei Gloria
































Eidesstattliche Erklärung


Hiermit erkläre ich an Eides statt, dass ich die vorliegende Arbeit selbstständig angefertigt
habe und keine anderen als die angegebenen Quellen und Hilfsmittel verwendet habe, sowie
dass diese Arbeit noch keiner anderen Prüfungskommission als Diplomarbeit oder ähnlicher
Prüfungsarbeit vorgelegt worden ist.


Hannover, 07.01.2008



A. Michael Klüken











Table of contents v
Table of contents
TABLE OF CONTENTS .......................................................................................................... V
LIST OF ABBREVIATIONS .................................................................................................XII
SUMMARY .......................................................................................................................... XIV
RESUME............................................................................................................................... XVI
ZUSAMMENFASSUNG...................................................................................................... XIX
GLOBAL INTRODUCTION .................................................................................................. 23
IMPORTANCE OF CEREAL APHIDS ....................................................................................................... 23
THRESHOLD LEVEL CONCEPTS AND THEIR PROBLEMS..................................................................... 24
POPULATION MODELS.......................................................................................................................... 26
MIGRATION .......................................................................................................................................... 27
EVALUATION OF CEREAL APHID POPULATIONS................................................................................. 30
LANDSCAPE STRUCTURE AND POPULATION GENETICS ..................................................................... 31
HOST PLANT SPECIALISATION............................................................................................................. 32
OBJECTIVES AND CHAPTER TITLES ............................................................................... 34
CHAPTER 1: COMPARISON AND VALIDATION OF POPULATION MODELS FOR
CEREAL APHIDS................................................................................................................... 36
ABSTRACT............................................................................................................................................. 36
INTRODUCTION .................................................................................................................................... 37
MATERIALS AND METHODS ................................................................................................................. 39 Table of contents vi
FIELD EVALUATION ............................................................................................................................... 39
MODEL SIMLAUS ................................................................................................................................ 40
MODEL LAUS ....................................................................................................................................... 41
MODEL GETLAUS01............................................................................................................................ 42
VALIDATION AND STATISTICAL ANALYSIS............................................................................................ 43
RESULTS ............................................................................................................................................... 44
GENERAL RESULTS ................................................................................................................................ 44
MODEL SIMLAUS ................................................................................................................................ 44
MODEL LAUS ....................................................................................................................................... 47
MODEL GETLAUS01............................................................................................................................ 48
DISCUSSION .......................................................................................................................................... 54
MODEL SIMLAUS ................................................................................................................................ 55
MODEL LAUS ....................................................................................................................................... 56
MODEL GETLAUS01............................................................................................................................ 58
CONCLUSIONS........................................................................................................................................ 62
Acknowledgements ............................................................................................................................... 62
CHAPTER 2: FORECASTING GRADATION OF CEREAL APHIDS (HEMIPTERA:
APHIDIDAE) IN WINTER WHEAT AT EAR EMERGENCE............................................. 64
ABSTRACT............................................................................................................................................. 64
INTRODUCTION .................................................................................................................................... 65
MATERIALS AND METHODS ................................................................................................................ 67
FIELD DATA EVALUATION ..................................................................................................................... 67
SUCTION TRAP SAMPLES........................................................................................................................ 67
METEOROLOGICAL PARAMETERS.......................................................................................................... 69
DEFINITION OF VARIABLES.................................................................................................................... 69
STATISTICAL ANALYSES........................................................................................................................ 69
LOGISTIC REGRESSION ANALYSES (LOG RA) ........................................................................................ 70
LINEAR DISCRIMINANT ANALYSES (LIN DA) ........................................................................................ 71
MODEL VALIDATION.............................................................................................................................. 72
RESULTS ............................................................................................................................................... 73
GENERAL RESULTS ................................................................................................................................ 73
LOGISTIC REGRESSION ANALYSES (LOG RA) ........................................................................................ 74
LINEAR DISCRIMINANT ANALYSES (LIN DA)......................................................................................... 81
EXAMPLES FOR LIN DA AND LOG RA ................................................................................................... 83
MODEL VALIDATION.............................................................................................................................. 84 Table of contents vii
DISCUSSION .......................................................................................................................................... 85
GENERAL DISCUSSION ........................................................................................................................... 85
ESTABLISHMENT OF “WINTER CONDITIONS” AND “REAL MIGRATION” SUBMODELS ............................ 86
COMPARISONS OF METHODS.................................................................................................