Spraying rhododendron.

[bulltaco]

Just been given a photocopy of FC practice note, Managing and Controlling invasive rhododendron.

2% roundup is recommended dilution.

Edited August 25, 2010 by bulltaco
spelling

[porky]

Here is the Roundup Pro Biactive label just out of interest. It confirms the FC guide, after a lot of reading! : -

 

http://www2.monsanto-ag.co.uk/publications/ProBiactive_product_information_guide_final.pdf

[blue beastie]

yep sorry ignore me, still on the first coffee of the day, its 20% for stump treatment

 

I have only done stump treatment on fresh cuts, never used it for foliar application, Has anyone used dyes in tank mixtures, to make treated stumps easier to spot, its not a route i have gone down but would be interested in identifying suitable dyes to use

 

Would be interested in this too.

[slack ma girdle]

Interesting, that the label recomends that you spray glyophosate in May. Trials in N Wales by CCw and the National trust found that November was the best time to spray Rhoddie. Spraying at this time had the highest kill rate.

Generally i use a fan nozzle with the largest diameter hole, and the pressure set on its lowerest setting. This gets the leaves really wet.

Gylophsate is supposed to have a sticking agent already mixed in, but in practice it does not make much difference, therefore adding Mixture B is needed to make it stick to the shiney leaves.

[Quickthorn]

yep sorry ignore me, still on the first coffee of the day, its 20% for stump treatment

 

I have only done stump treatment on fresh cuts, never used it for foliar application, Has anyone used dyes in tank mixtures, to make treated stumps easier to spot, its not a route i have gone down but would be interested in identifying suitable dyes to use

 

i tend to use a dye or pattern indicator on most jobs where there's a chance of getting lost. I use something called Amenitywise pattern indicator - a blue dye - but I'd imagine it's very similar to dyofix . It looks about the same price - £30/l, but it does go a long way. Cheaper than having to come back weeks or months later when it becomes obvious you've missed stuff out !

[APC]

I have totally nuked about half an acre of rhodie with a 2% roundup biactive from a CP3 with a green nozzle. Did most of it last year in August. This year, the stuff I have sprayed is dead, dried up and brittle sticks. The bits I missed have been done this August. Will hopefully finish it off next year.

[porky]

Did you use a wetting agent with it?

[APC]

Did you use a wetting agent with it?

 

 

Nothing at all!

 

For reference, the rhodie had been cut probably 2-3 years previously and was up to a metre and a half high with stems up to thumb thickness, from larger wrist thickness stools. Totally brownbread.

[porky]

Nice one! That's valuable information.