1. Possibility of Generic Cold Treatments
PTTEG Meeting
17-20 Aug 2015
Citrus Research International
Nelspruit, South Africa

2. Involves extrapolation
Generic treatment: one specific treatment schedule is used for a group of quarantine pests and or commodities although not all were tested for efficacy.*
Involves extrapolation
*Hallman, GJ Generic phytosanitary irradiation treatments. Rad. Physics Chem. 81:

3. PI is where the generic concept has had notable success
Term began being used for phytosanitary irradiation treatments by the ICGFI and IAEA in the 1980s; two generic PI treatments were ambitiously proposed at that time:
150 Gy: all tephritid fruit flies on all hosts 300 Gy: all insects on all hosts
PI is where the generic concept has had notable success
Benebión PI facility Mexico

4. Can generic treatments besides PI be developed?
Actually, they have been long ago.
E.g., the USDA-APHIS-PPQ Treatment Manual has some generic cold treatments;
T107-a-1 is for 18 fruits against Anastrepha spp (less A. ludens) although not all fruits and species of Anastrepha were studied.
Anastrepha fraterculus

5. The range of cold treatment doses is roughly of the same magnitude:
The range of doses for PI against Tephritidae is 50 (Rhagoletis) to 150 Gy (Zeugodacus).
The range of cold treatment doses is roughly of the same magnitude:
15 (Ceratitis) to 40 days (Rhagoletis).
However, commodity tolerance and time required to apply a 40 d treatment make a proposed generic cold treatment of 40 d for Tephritidae impractical.
Rhagoletis pomonella

6. Nevertheless, useful generic doses narrower than “all Tephritidae” can be developed.
Removing Rhagoletis and other temperate tephritids would lower the dose.
Treatments generic for host commodity would be a great improvement.

7. For discussion:
Are generic cold treatment doses possible and worth the effort?
What would these doses look like?
What work would be required to achieve useful generic doses?
If they look promising, who will work on this project?