Distribution of two rotation-resistant corn pests in eastern Iowa and effects of soybean varieties on biology of Diabrotica virgifera virgifera

20 Introduction 20 Methods 25 Results 30 Discussion 33 Acknowledgments 38 Reference Cited 39 CHAPTER 3. EFFECT OF SOYBEAN VARIETIES ON WESTERN CORN ROOTWORM SURVIVAL AND FECUNDITY 60 Abstract 60 Introduction 60 Methods 64 Results 67 Discussion 69 Acknowledgments 73 Reference Cited 7360 Introduction 60 Methods 64 Results 67 Discussion 69 Acknowledgments 73 Reference Cited 73 CHAPTER 4. GENERAL CONCLUSIONS 85