On behalf of Nick and others:
This excerpt from the following article on the westernfarmpress.com website may shed some light on the move to Mankocide in recent years.
Walnut blight: What went wrong this season? Aug. 29, 2012
Joe Grant, UCCE Farm Advisor and Jim Adaskaveg, Plant Pathologist, UC Riverside
Tank-mixing copper with Manzate fungicide (mancozeb) in all applications. High levels of bacterial copper resistance have now been documented in many walnut districts, orchards, and varieties. As currently understood, copper-resistant walnut blight bacteria have an enhanced ability to protect them-selves by “pumping out” copper ions that penetrate cell membranes. Manzate disrupts cell membranes, overcoming this protective mechanism.
Thanks for your replies, they are very informative.
I have just purchased 10kg of Kocide Opti from CRT.
We needed to get into spraying fairly hastily as budburst is happening & I was in a flap!
Took the day off work to get sorted & went shopping.
The spray tank all 1000l of it when fill was too heavy for the hydraulics on our aging International tractor to lift.
Swapped to the trusty Ford tractor & away I went wheelstanding as I went.
As our trees are mostly on slopey land I had to back up the hills spraying as I went, steering with the tractor brakes.
Our boom sprayer was redundant as the other tractor was fitted with that so I resorted to spraying almost vertically with the handgun which worked.but was very wetting when the wind changed( I’m wearing protective gear by the way!)
With one paddock done I have managed to use 200litres of mix so the other tractor wont lift the tank yet.
I topped off the day by backing the tractor into the shed used for the other tractor & bent the exhaust on the roof!
Sounds like a comedy skit but that’s life some days.
I forgot to add I sprayed 8 trees initially with the backpack initially which was tiring as I am still healing after breaking my Tibia & Fibula 9 months ago.
Sorry to prattle on a bit but thought you may get a laugh out of my crap day.
I hope tomorrow is better with 2 paddocks to spray.
Andy & Karen Philpott
Sounds like a normal day for a small block owner.
What puzzles me, is that I do not intend to spray until the 1st week in November, and you would think bud burst would be earlier in the Bay of Plenty than Timaru. One of us has got our timing wrong!
All the best