Page 



Section 4. Examination of Snail Fecal Content 55 



Introduction 55 



Materials and Methods 55 



Results and Discussion 55 



Section 5. Determination of the Snail Feeding Potential . . 57 



Introduction 57 



Materials and Methods 57 



Results and Discussion 59 



Snail Density and its Effect on Sooty Mold .... 59 

 Snail Density and its Effect on Citrus Rust 



Mite 63 



CHAPTER II BIOLOGICAL STUDIES OF THE CITRUS RUST MITE 77 



Section 1. Methods for Monitoring Citrus Rust Mites .... 77 



Introduction 77 



Materials and Methods 77 



Hand Lens Method 77 



Alcohol Emersion Method 78 



Results and Discussion 78 



Section 2. Extrinsic and Intrinsic Orientation of Citrus 



Rust Mite on Valencia Orange 81 



Introduction 81 



Materials and Methods 82 



Method of Counting 82 



Results and Discussion 82 



CHAPTER III EFFECT OF DIFFERENT ACARICIDES ON CITRUS RUST 



MITE 92 



Introduction 92 



Materials and Methods 92 



1975 Field Acaricide Spray Tests 92 



1976 Field Acaricide Spray Tests 94 



Results and Discussion 95 



1975 Field Acaricide Spray Tests 95 



1976 Field Acaricide Spray Tests 120 



Comparison of 1975 and 1976 Evaluations 132 



Treatment Data 132 



Chemical Standards 134 



SUMMARY 135 



LITERATURE CITED 139 



BIOGRAPHICAL SKETCH 144 



