Yes, my friends, one of the most tenacious pest have reared their ugly little heads in my neighborhood. As whiteflies have become increasingly resistant to chemical control throughout the U.S, we are faced with a real dilemma. Chemical control is difficult and expensive which makes the cost of treatment prohibitive. There have been studies that suggest that treating resistant whitefly populations with certain insecticides could actually increase the population growth. It could be because they lay more eggs when under biochemical stress or because pesticides eliminate natural predators. Rotating different classes of chemical compounds every other spray is about the only way to effect control. Soaps and oils are one of the few things that whiteflies are unlikely to develop a resistance to and should be used as much as possible before using chemicals. An effective IPM coupled with rotated chemical control such as pyrethroids ( Karate, Asana, Ambush), carbamates (Vydate) chlorinated hydrocarbons (Thiodan) organophosphates ( Orthene, Lorsban) and insect growth regulators (fenoxicarb, Applaud) may allow us to eventually gain control. Even the best pesticide, however, will fail if there is substandard coverage. Most whitefly are located under the leaf where they are protected from spray applications and the the instar stages ( except the crawler stage) are immobile and are not exposed. Are there any recommendations as far as the eradication of this pest that I have not touched on?