Soybean aphid

on insect pest management. He joined Rothamsted Experimental Station in September 1943, where he studied DDT and other new insecticides. He made two major contributions to the world of entomology. The first contribution was a study on peach-potato aphid and the second pointed out during a debate in the 70’s on ecosystem diversity and stability, that for any pest problem, “how with the introduction of just one element of new diversity would usually be all that was needed to improve control. (

Introduction to Hydroponics and Controlled Environment Agriculture by Patricia A. Rorabaugh, Ph.D. University of Arizona Controlled Environment Agriculture Center 1951 E. Roger Road Tucson, AZ 85719 Revised December, 2012 TABLE OF CONTENTS CHAPTER 1: Controlled Environment Agriculture and Hydroponics: Past, Present and Future The Plant How to grow greenhouse crops Plant Protection: Insects and Diseases Basic Principals of Hydroponics Transplant Production Pollination, Fertilization and Bee