• Chemical Freeze Protection of Citrus 1988/1989

      Butler, Marvin; Brown, Paul; Butler, Marvin (College of Agriculture, University of Arizona (Tucson, AZ), 1991-01)
      Five chemical frost protectants and a water treatment were applied to Lisbon lemons by dipping branches to insure complete coverage. A constant temperature bath was used to determine the effect of chemical frost protectants on the freezing temperature for leaf samples placed in test tubes with 10 ml of distilled water. Although the relative temperature at which the different treatments froze remained fairly constant, the differences were not significant.
    • Chemical Freeze Protection of Citrus 1989/1990

      Butler, Marvin; Brown, Paul; Butler, Marvin (College of Agriculture, University of Arizona (Tucson, AZ), 1991-01)
      Three chemical frost protectants were applied to Lisbon lemons using a hand gun operated from a John Bean sprayer. Leaf samples were placed in test tubes with 10 ml of distilled water to determine the temperature at which they froze using a constant temperature bath. Although the sample size was increased by 50 percent over the previous year, the treatments were not significantly different from the untreated.