The LT50 (50% lethal time) and LT99 of various instars of the Madeira mealybug, Phenacoccus madeirensis were determined after exposing to various time periods (3 to 72 hours) at low (-5, 0, 5, and 10 oC) and high (35, 40, 45, and 50 oC) constant temperatures. At high temperatures, mortality rates increased with increased exposure time and temperature. Exposure time of 3 hours at 50 oC was sufficient in causing 100% mortality in all instars. No significant effects of temperature and exposure time on the mortality rates of the mealybugs were detected at low temperatures. Implications of the results in the sanitization of greenhouses will be discussed.
Species 1: Homoptera Pseudococcidae Phenacoccus madeirensis (Madeira mealybug)
Keywords: time-mortality, sanitation
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