Help with my Cert. Arb please

[Kveldssanger]

The question doesn't suggest chronology. There are periods in my life when I am run down, stressed, or otherwise. Blame the question for being too open to interpretation.

[DanClimbsTrees]

The question doesn't suggest chronology. There are periods in my life when I am run down, stressed, or otherwise. Blame the question for being too open to interpretation.

 

Haha

 

A fair few of the questions are written in that style so usually I just go by gut instinct which worked in most part for the first unit!

 

Cheers

[jaime bray]

Period one, production. During production; I.e from seed to seedling a tree is susceptible to a, b, c, etc.

Period two, establishment; from nursery stock bed to urban/commercial planting a tree is susceptible to a, b, c, etc.

 

Identify and state the period, this will show a sufficient knowledge of a trees life cycle, therefore demonstrating a more rounded knowledge. Consequently, this will also enable you to create your answer and direct the flow of the answer to benefit the ease at which the reader takes in the information, whilst highlighting the salient points.

 

Edit, I question whether production is the best word, but this may be satisfactory given the description afterwards. I find that interpretation of questions in arb academia is as subjective as the whole subject full stop. Good luck!

Edited June 28, 2015 by jaime bray

[DanClimbsTrees]

Period one, production. During production; I.e from seed to seedling a tree is susceptible to a, b, c, etc.

Period two, establishment; from nursery stock bed to urban/commercial planting a tree is susceptible to a, b, c, etc.

 

Identify and state the period, this will show a sufficient knowledge of a trees life cycle, therefore demonstrating a more rounded knowledge. Consequently, this will also enable you to create your answer and direct the flow of the answer to benefit the ease at which the reader takes in the information, whilst highlighting the salient points.

 

Edit, I question whether production is the best word, but this may be satisfactory given the description afterwards. I find that interpretation of questions in arb academia is as subjective as the whole subject full stop. Good luck!

 

Just seen your comment, Jaime, thanks very much

[DanClimbsTrees]

Ok. So, next question.

 

Fungal colonisation strategies

 

What does it mean? I've looked over my usual websites and even my Shigo book and it's not explained clearly.

 

Is the strategy simply the part of the tree which the fungi enters through or is it the part of the tree which the fungi affects?

 

Cheers,

Dan

Edited July 16, 2015 by DanClimbsTrees

[daltontrees]

Ok. So, next question.

 

Fungal colonisation strategies

 

What does it mean? I've looked over my usual websites and even my Shigo book and it's not explained clearly.

 

Is the strategy simply the part of the tree which the fungi enters through or is it the part of the tree which the fungi affects?

 

Cheers,

Dan

 

I seem to remember being told to be careful to distinguish between colonisation and infection. Colonisation is the establishment of the pathogen on the tree, perhaps a spore in a wound. Infection is when the germinated spore enters into the cells of the host tree.

 

So I think it refers to how the fungus gets in. The primary ones are sapwood intact, sapwood exposed, active pathogenisis and heartwood.

 

If I'm right. it's not the same as decay strategies which relate to the woody component attacked (lignin, cellulose, hemi-cellulose) and come usually under the headings of white, brown and simultaneous rots. These are infection rather than colonisation.

 

So again if I'm right the main ways for a fungus to get in is through a wound, through a decayed taproot or deep wound into heartwood, by being there dormant since the tree's infancy or by forcing its way in through the roots.

[jaime bray]

They're was a piece of work written many a year ago. It was particular to this question, or vice versa. The phrases your after address, sap woods exposed, sap wood intact, heartwood exposed. Or something similar to that. There were three to four written about in arb literature and one author described then in this way. That is the standard answer for this question. Mattheny and Clark spring to mind

[jaime bray]

Alan Rayner was author of key terms you require.

[jaime bray]

Sorry Jules, just saw you had already written about the key terms/phrase. Didn't read all your post

[daltontrees]

Sorry Jules, just saw you had already written about the key terms/phrase. Didn't read all your post

 

And that was one of my uncharacteristically short ones!