Polyphagous Shot Hole Borer (PSHB) treatment protocols and delivery methods

arboristreg

New Member
Over the past 10 years the Polyphagous Shot Hole Borer (PSHB) has reared it's ugly head in several countries (US, Israel, South Africa) and different control and treatment strategies have been developed.

I would like to find out some practical experiences that have been learnt in the field.

What chemicals have the best results (short term and long term)?
What organics and bio stimulants are recommended to boost tree health?
What is the optimal treatment intervals for reactive treatment vs preventative treatment?
Which tree genus responds best to which treatment protocol?
Is truck spray effective, and which surfactant works best to penetrate the tree's vascular system?
As an arborists what are the advantages and disadvantages of the professional injection systems?
What injection systems are best for private use?
 

arboristreg

New Member
Research that was published in the Journal of Economic Entomology in January 2019 concludes that:

"There are no sustainable control options for polyphagous shot hole borer other than maintaining tree vigor and removal of severely infested host material."

It also evaluates the effectiveness of therapeutic treatments of an injected systemic insecticide containing emamectin benzoate (EB) alone and in combination with a systemic fungicide.

Does anyone have experience with the injection of emamectin benzoate formulations that are not specifically designed for tree I.V.?
 
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