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My knowlegde as someone that treats JKW is that dormancy can be induced by multiple factors - the main one being 'any' attack on its ability to grow will/can cause it to go dormant for 10+ years.
Such 'attacks' can be - hard pruning, barrier method (ie removal of ability to photsynthise), chemical attack, etc.
I'm sure there's a more eloquent way to say that, but....
So, are we talking semantics ? In my mind its is not the product that causes it, it is the action against the plant that activates/triggers the plants defence mechanism.
It is a b*gger of a plant, in fact I've been out to survey a small outbreak today at a site of one of our commercial clients. The cost to deal with it will be reasonably substantial. Most of the outbreaks I deal with are small enough that makes stem injection a very effective method. I have only sprayed as a method to deal with JKW once.
Hi Gary, can you enlighten me as to whether there is a legal requirement to attend a JKW stem injection course, or if not is it worthwhile to attend one or would the knowledge you gain from PA6 suffice?
Phil, read this thread. It will help.
http://www.landscapejuicenetwork.com/forum/topics/qualifications-ne...
Utlimately the answer is yes - PA6D - now whether anyone is going to go ape if you have PA1/PA6 but not the D is another matter.
The additional training is minuscule when doing normal training. It is mainly concerned with high pressure contained with injector and sufficient mechanical safe guards for operator, such a PPE/wrap round eye protection/face guard etc as you are close to possible 'squirt back' ;-)