Abstract
Abstract The mortality response of fifth instar lightbrown apple moth (LBAM; Epiphyas postvittana Walker) and longtailed mealy bug (LMB; Pseudococcus longispinus Targioni-Tozetti) on persimmons to heat treatments was examined at air temperatures between 44 °C and 50 °C. LMB were more tolerant to heat treatment than LBAM and there was no difference in mortality for both species between insects found on the surface of the fruit, or under the calyx. An estimated treatment time of 12.4 h (including a 2-h warming-up period) at 44 °C was needed to achieve 99% mortality of LMB. This time decreased with increasing temperature to about 3.8 h (including a 2-h warming-up period) at 50 °C. Further investigations should confirm hot air treatment of persimmons as a viable disinfestation method against LMB and LBAM, causing only minor levels of heat injury to the fruit but capable of inducing additional chilling resistance.
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