Thermal death kinetics and heating rate effects for fifth-instar Cydia pomonella (L.) (Lepidoptera: Tortricidae)

Abstract

Thermal death kinetic parameters of fifth-instar codling moths (Cydia pomonella (L.)) and the effect of three heating rates (11C min À1 , 101C min À1 , and 181C min À1 ) on larval mortality were determined by a heating block system. The insects were heated to four temperatures (461C, 481C, 501C, and 521C) held for predetermined periods followed by 24 h storage at 41C before mortality evaluation. Thermal death kinetics for fifth-instar codling moths followed a 0.5th order of kinetic reaction. Minimum time required to achieve 100% mortality of a given population decreased with temperature in a semi-logarithmic manner. No larval survival was observed in samples of 600 insects after exposure to 461C, 481C, 501C, and 521C for 50, 15, 5, and 2 min, respectively. Activation energy for thermal kill of fifth-instar codling moths at the heating rate of 181C min À1 was estimated to be about 472 kJ mol À1 . The lethal time accumulated during the ramp period was about 1.8, 0.2, and 0.1 min for the heating rates of 11C min À1 , 101C min À1 , and 181C min À1 , respectively. r

Reaction Orders for Thermal Mortality of Third Instars of Mexican Fruit Fly (Diptera: Tephritidae)

“…The E a values for C. cephalonica were similar to those for S. oryzae (Yan et al 2014), fifth-instar Cy. pomonella (Wang et al 2002a), fifth-instar P. interpunctella (Johnson et al 2003), fifth-instar A. transitella (Wang et al 2002b), third-instar Ce. capitata (Gazit et al 2004), and Queensland fruit fly, Bactrocera tryoni eggs (Waddell et al 2000), larger than those Caribbean fruit fly, Anastrepha suspensa eggs (Moss and Chan 1993), but smaller than those for T. castaneum ) and Ce.…”

“…This type of plot was used for thermal kinetics of Cy. pomonella by Wang et al (2002a). The z value (the temperature difference by which the mortality rate is altered by a factor of 10) was obtained from the TDT curve as described in details elsewhere .…”

“…Although only 0th order kinetic model is reported for adult rice weevil, Sitophilus oryzae (Yan et al 2014), the 0.5th order kinetic model has been mostly applied to thermal response of many insects, such as Cy. pomonella (Wang et al 2002a), Indianmeal moth, Plodia interpunctella (Johnson et al 2003), A. transitella (Wang et al 2002b), Mediterranean fruit fly, Ceratitis capitata (Gazit et al 2004, Armstrong et al 2009), red flour beetle, Tribolium castaneum , and Mexican fruit fly, Anastrepha ludens (Hallman et al 2005). To develop effective heat treatments on disinfesting walnuts, it is essential to determine the thermal death kinetic models for the C. cephalonica based on the HBS data.…”

Review Article of Radio Frequency and Microwave Heating Treatment to Disinfest Kutu Beras in Malaysian Rice

“…The result as in tabulated in Table 1. The effect of holding time is need significant consideration in designing the treatment to reach lethal temperature in order to obtain high mortality rate [24]. In term of heating rate and energy, it can be concluded that higher heating rate provide low mortality and it needs longer holding time to reach high mortality as low heating rate can provide [24].…”

“…The effect of holding time is need significant consideration in designing the treatment to reach lethal temperature in order to obtain high mortality rate [24]. In term of heating rate and energy, it can be concluded that higher heating rate provide low mortality and it needs longer holding time to reach high mortality as low heating rate can provide [24]. Siming Zhao reported complete disinfestation above energy consumption of 0.017 and 0.016 kWh/ks for adults and eggs respectively as the rice temperature from 55 to 62°C [23].…”