| TABLE OF CONTENTS | 第3-8页 |
| LIST OF TABLES | 第8-9页 |
| LIST OF FIGURES | 第9-12页 |
| ABSTRACT | 第12-14页 |
| 摘要 | 第15-17页 |
| CHAPTER ONE Introduction and Literature Review | 第17-33页 |
| 1. Introduction | 第17-20页 |
| 2. Literature Review | 第20-33页 |
| 2.1 History of rice cultivation | 第20页 |
| 2.2 Insect pests of rice | 第20-22页 |
| 2.2.1 Rice brown plant hopper | 第21-22页 |
| 2.2.2 Insect Damage | 第22页 |
| 2.3 Effect of insecticides on Brown Planthopper | 第22-26页 |
| 2.4 insecticides resistance | 第26-29页 |
| 2.5 Insecticide induced BPH Resurgence | 第29-33页 |
| 2.5.1 History of Insecticide Induced Resurgence in Rice | 第29-30页 |
| 2.5.2 Causes of BPH Resurgence | 第30-33页 |
| CHAPTER TWO Comparisons of stimulation effects of series of concentrations ofFour insecticides on the reproduction of Nilaparvata lugens | 第33-60页 |
| Abstract | 第33-34页 |
| 1. Introduction | 第34-36页 |
| 2. Materials and methods | 第36-38页 |
| 2.1 Rice variety, insects and insecticides | 第36页 |
| 2.2 Bioassay | 第36-37页 |
| 2.3 Effect of insecticide concentration on stimulation Reproduction of N.lugens | 第37-38页 |
| 2.4 Statistics analysis | 第38页 |
| 3. Results | 第38-58页 |
| 3.1 Toxicity insecticides to third instar N. lugens nymphs | 第38-39页 |
| 3.2 Effect of insecticide concentration on fecundity of N. lugens | 第39-44页 |
| 3.3 Effect of insecticide concentrations on preoviposition duration (PD) of N. lugens | 第44-49页 |
| 3.4 Effect of insecticide concentration on oviposition duration (OD) of N. lugens | 第49-52页 |
| 3.5 Effect of insecticide concentration on longevity of female (LOF) of N. lugens | 第52-54页 |
| 3.6 Effect of insecticide concentration on viability of N.lugens eggs | 第54-58页 |
| 4. Discussion | 第58-60页 |
| CHAPTER THREE Imidacloprid-induced transference effect on some elements inrice plants and the brown planthopper Nilaparvata lugens | 第60-73页 |
| Abstract | 第60-61页 |
| 1. Introduction | 第61-62页 |
| 2. Materials and methods | 第62-65页 |
| 2.1 Insecticide,rice variety and insect | 第62-63页 |
| 2.2 Effect of different rates of imidacloprid on elements of rice plants,N.lugens and honeydew excretion | 第63页 |
| 2.3 Quantifications of chemical elements of rice plants, N.lugens and honeydew | 第63-64页 |
| 2.4 Standard solution | 第64页 |
| 2.5 Measurement of several elements in plants and N.lugens from rice fields in two regions | 第64-65页 |
| 2.6 Statistical Analyses | 第65页 |
| 3. Results | 第65-70页 |
| 3.1 Effects of imidacloprid foliar sprays on elements of rice leaf sheaths and leaf blades | 第65-67页 |
| 3.2 Effects of imidacloprid foliar sprays on elements in adult females and their honeydew | 第67-68页 |
| 3.3 Transference of imidacloprid-induced element changes between rice plants and N. lugens | 第68页 |
| 3.4 Differences in the element contents of rice plants and N. lugens in the rice field | 第68-70页 |
| 4. Discussion | 第70-73页 |
| CHAPTER FOUR Effect of Ethiprole on resurgence of brown planthopper andits effects on physiology and biochemistry of rice plant | 第73-87页 |
| ABSTRACT | 第73-74页 |
| 1. Introduction | 第74-75页 |
| 2. Materials and methods | 第75-78页 |
| 2.1 Rice variety, insects and insecticides | 第75页 |
| 2.2 Bioassay | 第75-76页 |
| 2.3 Effect of series of concentrations of ethiprole on stimulation of reproduction of N. lugens | 第76页 |
| 2.4 Determination of reducing sugar in rice plants | 第76-77页 |
| 2.5 Determination of oxalic acid | 第77-78页 |
| 2.6 Statistical Analysis | 第78页 |
| 3. RESULTS | 第78-84页 |
| 3.1 Toxicity regressions of four insecticides to third instar Nymphs of N. lugens | 第78-79页 |
| 3.2 Effect of series concentrations of ethiprole on reproduction of N. lugens | 第79-80页 |
| 3.3 Effect of different treatments on the reducing sugar in rice plants | 第80-82页 |
| 3.4 Effect of different treatments on the oxalic acid in rice plants | 第82-84页 |
| 4. DISCUSSION | 第84-87页 |
| CHAPTER FIVE SUMMARY AND CONCLUSION | 第87-89页 |
| ACKNOWLEDGEMENTS | 第89-91页 |
| REFERENCES | 第91-108页 |
| PAPERS PUBLISHED IN JOURNALS DURING STUDY PERIOD | 第108-109页 |
