2. Plant Regulator 480 or 720gms/L of Ethephon Releases
Ethylene Ripening Senescence Nut drop Leaf drop
3. AMS has a permit from APVMA for ALL varieties ALL growing
regions Label is WRONG Needs to be addressed
4. Standard spray equipment (air blaster) Poorly translocated
in tree Good uniform coverage important Recommend use with a non
ionic surfactant Spray to point of run off (inside and outside of
tree)
5. Accelerates nut drop It does NOT initiate nut drop Nut drop
MUST have started to drop nut before application Balance between In
NSW April is suitable
6. Successful rate and application will cause Nut drop in 2-3
weeks after application Depending on variety between 60 90% nut
drop
7. Reduced harvest costs Improvement kernel quality Opportunity
to undertake other orchard operations Break pest/disease cycle
Improved rat control Removes need for hand harvesting in young
trees
8. Parasitic leaves aredropped Benefit to productive plant
growth Leaf drop in tight varieites (A16 & Daddow) Increase
light into canopy Improves spray penetration into canopy
9. Liaise with neighbours Very low toxicity Common courtesy
Managing leaf fall No loss in yield in following season due to leaf
fall Rate is different for each variety
10. Ethrel does not manage sticktights Sticktight is dead
tissue Does not absorb ethylene Application needs to be prior to
sticktights forming Trees under stress should NOT be sprayed with
Ethrel Phytophthora, Canker, poor nutritionWet weather
restrictingaccess for application
11. Logistics requires careful planning Application to blocks
staged over several weeks Spray different areas at different times
Harvester capacity Block 1 Block 2 Dehusking capcity SHED Block 3
Shed capacity Block 5 Block 4
12. Dose Rate For Different Varieties (Northern Rivers NSW)
(Based on data given to AMS to support APVMA Permit Application.
Interpretation by Patch, Quinlan and Gillett observations)
Suggested Nut Drop Leaf Drop Scale Dose Rate compared toVariety
unsprayed control (1=excess Comments (480 gms/lt a.i as 5=moderate
mls/100 lts 14 days 21 days 10=low) water) A16 180-250 45% 75% 7
Works better at higher rate A38 80-125 64% 94% 7 Very effective A4
80-125 59% 93% 8 Leaf drop at 125mls/100lts 849 125 66% 92% 7 Very
effective 246 125 57% 80% 5 Very effective344/741 80-125 63% 96% 4
Very effective 814 80-125 60% 70% 9 Leaf drop at 125mls/100lts 842
80-100 50% 83% 8 Leaf drop at 125mls/100lts