• The Ash Whitefly as a Pest of Citrus

      Byrne, David N.; Butler, Marvin; Department of Entomology (College of Agriculture, University of Arizona (Tucson, AZ), 1991-01)
    • Control of Insects and Mites Associated with Citrus in Yuma, Arizona

      Byrne, David N. (College of Agriculture, University of Arizona (Tucson, AZ), 1986-12)
      A variety of insecticides have been tested during the last three years to keep pace with the ever-present demand for effective materials to control mites and thrips on citrus. This need is particularly acute with the recent loss of dicofol (Kelthane), which for years was an industry standard for mite control. Some of the more promising new compounds include Avermectin and NC 21314. Comments are included concerning the registration status of some of the compounds we tested. Cautions are given concerning the development of resistance to compounds which are soon to be available.
    • Evaluation of Materials for Control of Citrus Thrips

      Butler, Marvin; Byrne, David N. (College of Agriculture, University of Arizona (Tucson, AZ), 1986-12)
      The control of citrus thrips is a major concern for citrus growers in the Yuma area. Five materials were evaluated for control of citrus thrips on Lisbon lemons at the Yuma Mesa Agricultural Center during July and August of 1985. Although there was no statistically significant differences between treatments, Mavrik appeared to provide the best control of the materials tested. Dimethoate (Cygon) and formetanate hydrochloride (Carzol) were not tested.
    • Evaluation of Potato Leafhopper, Empoasca fabae L., Populations in Arizona Citrus

      Byrne, David N.; Draeger, Erich A.; Wright, Glenn (College of Agriculture, University of Arizona (Tucson, AZ), 1997-11)
      The potato leafhopper, Empoasca fabae L., is a significant pest in the United States, and elsewhere, of alfalfa and potatoes In Arizona and in Coastal and Central California it can also be a pest of citrus. In 1994 and 1995 we collected information concerning their seasonal abundance in a large citrus orchard near Newman Peak Arizona. To do so we employed yellow sticky traps around the orchard periphery, at the same time using a D-Vac® vacuum sampler in the weeds growing in the interior of the orchard During both years peak populations occurred near mid April. This was correlated with a drop in relative humidity and a rise in ambient air temperature.