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• PRO

  Nick @ NM Garden Services Ltd September 16, 2012 at 9:05pm

  Berthoud Pro Comfort sprayer and Clinic Ace (contains glyphosate).
• PRO

  Brian www.mibservices.co.uk September 16, 2012 at 9:08pm

  Try this website www.progreen.co.uk for chemical. A hectare is a hell of a size to do with a backpack sprayer though. Make sure you get a triple boom attachment for it
• 

  steve September 16, 2012 at 9:12pm

  thanks nick
  
  Nick @ NM Garden Services Ltd said:

  Berthoud Pro Comfort sprayer and Clinic Ace (contains glyphosate).
• 

  steve September 16, 2012 at 9:13pm

  thanks brian   

  looking at web site now

  steve
  
  Brian www.mibservices.co.uk said:

  Try this website www.progreen.co.uk for chemical. A hectare is a hell of a size to do with a backpack sprayer though. Make sure you get a triple boom attachment for it
• 

  Benjamin O'Neill September 17, 2012 at 7:23pm

  sorry to butt in can anyone tell me what dosage of glyphos you put in a napsack sprayer per litre ?
• PRO

  Brian www.mibservices.co.uk September 17, 2012 at 7:34pm

  Benjamin your website advertises professional grounds maintenance services including herbicide application ?!?! Why are you asking what the dose rate is per litre, thats a must know piece of knowledge before you go spraying ??
  The norm is 20ml per litre.
  
  Benjamin O'Neill said:

  sorry to butt in can anyone tell me what dosage of glyphos you put in a napsack sprayer per litre ?
• 

  David Cox September 17, 2012 at 8:24pm

  Infact brian - THe 20ml per litre is way wide of the mark - the sprayer and the nozzels used all come into it when calibrating -

  For example recently I worked on a farm where the effective concentration was 10ml per L, but the spraying was done at a rate of 2l per Hectare (Glyph), therfore it was 4l of Glyph in 200 liters of water - this was to kill off an entire field of Silage maize which was a write off.

  Benjamin-  You should have covered how to calibrate your sprayer, and what dosages to use, when you did your PA1 and PA6 course. The Chemical bottles and suppliers will also happily provide the relevant data sheets for you to do your calibrations with.

  It is worth noting that ml per L is not going to help you as the calculations are based on "Area" spraying -0 if your are spot spraying, a certian type of weed then yes it would be more appropriate to mix to a given strength.

  Perhaps, as your talking of spraying 2.4 acres, subcontract this out to a local Agricultural contractor or farmer? It would take less than 15-20 mins to spray that area on a typical 80hp tractor - Id expect to pay £Chemical cost + £60 for the job.
• PRO

  Gary RK September 17, 2012 at 8:33pm

  I would support Brian's estimation which is pretty much spot on for spot spraying with 5l , 8l or 20l backpacks which is typically what commercial grounds care companies perform.
  
  Also this base mix ratio shown on instructions for backpacks.
  
  If spraying large 'regular 'areas to kill off or selectively treat areas then yes it makes sense to select nozzle and calibrate as per training and for 2 main reasons - adhering to statuary usage and cost.
  
  Observation based on too many years in the Busines....
• PRO

  Brian www.mibservices.co.uk September 17, 2012 at 8:52pm

  10 ml per litre ???? How long do you want to wait to have an area weed free. 20ml per ltr is where effective time to kill the weed is measured. At 10ml per ltr you would be 20 + days waiting on any affect taking place and it certainly wouldnt kill off docks, thistles and bay willow, which are generally what you will find on development land and would have zero effect on bramble or hog weed. 10ml yes if you want to wait weeks on results. 20ml if you want it to take effect in the time it states in the product data sheet
  
  David Cox said:

  Infact brian - THe 20ml per litre is way wide of the mark - the sprayer and the nozzels used all come into it when calibrating -

  For example recently I worked on a farm where the effective concentration was 10ml per L, but the spraying was done at a rate of 2l per Hectare (Glyph), therfore it was 4l of Glyph in 200 liters of water - this was to kill off an entire field of Silage maize which was a write off.

  Benjamin-  You should have covered how to calibrate your sprayer, and what dosages to use, when you did your PA1 and PA6 course. The Chemical bottles and suppliers will also happily provide the relevant data sheets for you to do your calibrations with.

  It is worth noting that ml per L is not going to help you as the calculations are based on "Area" spraying -0 if your are spot spraying, a certian type of weed then yes it would be more appropriate to mix to a given strength.

  Perhaps, as your talking of spraying 2.4 acres, subcontract this out to a local Agricultural contractor or farmer? It would take less than 15-20 mins to spray that area on a typical 80hp tractor - Id expect to pay £Chemical cost + £60 for the job.
• PRO

  Gary RK September 17, 2012 at 8:52pm

  Pro Biactive 360 Knapsack rate estimator
  
  A full 20 litre knapsack, applying spray at 250 litres/ha, will cover 800m2.
  Therefore, to apply Roundup at 4lt/ha, mix 320ml in 20 litres water.
  Therefore, to apply Roundup at 5lt/ha, mix 400ml in 20 litres water.
  Therefore, to apply Roundup at 6lt/ha, mix 480ml in 20 litres water.
  
  So, base mix is between 80ml to 120 ml per 5l