TABLE OF CONTENTS 



Page 



ACKNOWLEDGEMENTS ii 



ABSTRACT vi 



LITERATURE REVIEW 1 



Citrus Tree Snail 1 



Biology 2 



Physical Requirements 3 



Predators, Parasites, and Pathogens 4 



Chemicals 5 



•Food Sources 5 



•Effects on Yield 6 



Citrus Rust Mite 6 



Egg 7 



Larva 7 



Adult 7 



Sex Determination 7 



Rust Mite Dispersion 8 



Cultural Practices 9 



Chemical Control 10 



Injury to Citrus Fruit 10 



Methods of Sampling 11 



GENERAL INTRODUCTION 12 



CHAPTER I ' BIOLOGICAL STUDIES ON THE CITRUS TREE SNAIL .... 14 



Section 1. Seasonal Fluctuations of Snails in Groves .... 14 



Introduction 14 



•Materials and Methods 14 



Results and Discussion 14 



Section 2. Effects of Relative Humidity on Snail 



Activity 21 



Introduction 21 



Materials and Methods 21 



Results and Discussion 22 



Section 3. Effect of Snail Movement on Fruit Microbiota 



using Scanning Electron Microscopy 27 



Introduction 27 



Materials and Methods 27 



Results and Discussion 28 



Control Area 29 



Ambulatory Movement 29 



Areas of Snail Grazing 43 



IV 



