ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Disinfestation of leafroller and mite pests using a high-temperature controlled atmosphere.

Whiting, D. C.; Heuvel, J. van den;

Acta Horticulturae Year: 1998 Issue: No. 464 Pages: 267-271 Ref: 13 ref.

1998

บทคัดย่อ

Mortality responses of 3-day-old eggs and 1st, 3rd and 5th instars of Epiphyas postvittana, Planotortrix octo, Ctenopseustis obliquana and diapausing adult Tetranychus urticae to a high-temperature controlled atmosphere (1.2% O2 with 1% CO2 at 40 deg C) were determined in the absence of host fruit. The treatment incorporated a 21-h protocol to serially establish the target controlled atmosphere and temperature conditions. E. postvittana was the most tolerant leafroller to controlled atmosphere treatment. The mean treatment time for 99% mortality (LT99) for life stages of E. postvittana decreased in the following order: 3rd instars approx equal to 5th instars > 1st instars approx equal to 3-day-old eggs. Controlled atmosphere treatment was more effective against this species than air at 40 deg C (3th instar LT99 values of 34.6 and 44.2 h, respectively). P. octo and C. obliquana were equally susceptible to the controlled atmosphere treatment, and the life stages tested exhibited similar mortality

responses (LT99 values ranging between a minimum of 18.5 h to a maximum of 21.4 h). Both these leafrollers were more sensitive to air at 40 deg C than E. postvittana. T. urticae was more tolerant of the controlled atmosphere than the 3 leafroller species (mean LT99 value of 120.5 h). The mortality responses of diapausing T. urticae were similar under controlled atmosphere or air treatment at 40 deg C.