The two major factors that have a significant impact on the development of psyllid population, and their survival, are the availability of new growth flushes for the female ACP to lay their eggs and the temperature. In laboratory studies it was observed that approximately 50 percent of the ACP population can tolerate low temperatures at or below freezing (32-F) for two days, These temperatures are below most citrus growing areas. ACP subjected to higher temperatures of 104-F to 114-F the survival rate decreased by 95 percent to 100 percent. Therefor, it would appear that as temperatures increase or decrease from the optimal life temperature range of 68-F to 77-F, the rate of ACP mortality is affected. The impact of higher temperatures have greater effect on the death rate than exposure to lower temperatures.