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This Blog section is for news about Rainbow & Brown products and their application but especially new products.

General information about farming, weed control, herbicides, seaweed, fertlisers and other.

05 Sep Exploring the Potential of Plant Based Amino Acids
Shayne 0 3379
Exploring the Potential of Plant Based Amino Acids We have been conducting research and trial work on using plant based amino acids on pasture which we would like to share with our readers. The initial results have been very interesting and quite exciting. While traditional amino acids are sourced from fish, our plant based amino acids are derive..
04 Aug WIN - WIN - WIN
Shayne 0 3831
BOOSTING GROWTH, SAVING COSTS, SUPPORTING SUSTAINABILITY WITH GIBBERELLIC ACID (GA3) We have been supplying gibberellic acid for over 15 years so we have spoken to many people who have asked us if gibberellic acid really works. Gibberellic acid (our Gibb-Gro or Gibber 900) is a plant hormone that was discovered in 1953 and was mainly used on plan..
31 Jul The Second Life of Asulam
Shayne 0 4385
Asulam meets YBG It sounds like another episode in the Harry Potter series but no, it is definitely herbicide-related. Asulam was introduced around 1965 by a company called May & Baker. Some of us oldies will no doubt remember them. It’s a carbamate-based herbicide with a mode of action being a DHP inhibitor. Its primary target weeds are docks an..
30 Jul A Day out Spraying Foliar Fertiliser
Shayne 0 3626
A Day out Spraying Foliar Fertiliser Article written by Shayne McNamara A colleague recently spent some time with Rik Morris from RM Spraying learning about how some of the Rainbow & Brown foliar fertiliser products are used in the field.  RM Spraying is based out of Gore and applies foliar fertilisers to mostly dairy and sheep/beef farms in the ..
30 Apr Withholding Period for Herbicides
Shayne 0 55691
Withholding Period for Herbicides Although this information is available on our labels, we frequently receive inquiries about withholding periods. To address this, we have prepared a summary of the ACVM approved withholding periods for our product range. PRODUCT WITHOLDING PERIOD – STOCK AND/OR PLANT BACK WHACK – 2,4-D 800 ..
21 Feb Spraying Driveways and Waste Ground
Shayne 0 11087
My personal opinion... When I was spraying my driveway at home I got fed up with respraying, and although being a manufacturer where I get herbicides very cheaply, I decided to go and buy a competitor product called TAG G2(1) that you can get from most Farm supply stores.   I gave up on this as although TAG G2(1) is a very good product containing..
12 Feb The ABC of Ragwort Control
Shayne 0 5318
The ABC of Ragwort Control Ragwort is not a weed that lets you get away with a spur-of-the moment approach.   There are two reasons for that.  First is that this normally biennial plant has the ability to morph into a very hard-to-kill multi-crown perennial if it’s been mowed, slashed or ineffectually sprayed.  And each mature plant can produce 2..
17 Jan Unlocking the Secrets of Soil: A Beginner's Guide to the Art of Soil Conditioning
Shayne 0 3867
Unlocking the Secrets of Soil: A Beginner’s Guide to the Art of Soil Conditioning   Generally, improving soil depends on the Cation Exchange Capacity (CEC) of the soil that you are working with. Exchange capacity is merely a measure of the capacity of the soil to exchange nutrients.   Whether the CEC is large or small, it affects the soil’s cap..
12 Sep Does Water Quality Affect Herbicides?
Shayne 0 11360
Does Water Quality Affect Herbicides? A simple question and a resounding yes.  For instance, most of you know that some herbicides, glyphosate being one of them, lose activity in the soil but that also applies to soil particles in the water.  So if you are dragging water from a pond, even if you are filtering you need to be careful that the filter..
26 May Grass and Pasture Friendly Herbicides
Shayne 0 13321
Which Rainbow & Brown Herbicides are Grass and Clover Friendly? Below is a handy reference table to show which of our products are safe to use on pasture and / or clover and which have some residual effect which might affect replanting. Note: in some circumstances and at certain times of the year or at the rates required to control some weeds the..
25 May Controlling Weeds in New Pasture
Shayne 0 9442
Controlling Weeds in New Pasture This one can be tricky as many of the herbicides used for general weed control in established pasture are just too tough on new pasture and you risk damaging your new pasture. Whether grass weeds or broadleaf weeds they can be either annual or perennial. It is really important that you are on top of perennial weed..
10 Jan How Long Does it take for Herbicides to Kill Weeds
Shayne 0 39878
How long should it take stuff to die, after you’ve sprayed it?     It depends on three things.   First is the species, size and maturity of the weed involved.  Fast growing species, especially annuals, will die quickly because the herbicide is transported right through their smaller and simpler structures very quickly. Older, larger, and more ma..
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26 Oct Farm Chemical Compliance NZ: What WorkSafe Is Finding in Farm Sheds
Casey 0 646
Every NZ farm that uses hazardous substances needs an up-to-date chemical inventory and a current safety data sheet (SDS) for each product, kept where workers and emergency services can get to them. When WorkSafe checked 680 sheep, beef and dairy farms in late 2025, missing SDSs and inventories were behind 94% of the improvement notices issued. B..
08 Oct How to Choose the Right Wetter for Herbicide Spraying NZ
Casey 0 2131
A wetter helps spray droplets spread across a leaf and stay there, instead of beading up and rolling off before the herbicide gets in. Use a non-ionic wetter for everyday spraying, and step up to an organosilicone wetter for waxy, hairy, dusty or stressed weeds. Always check the herbicide label first, because it tells you whether a wetter is need..
30 Sep How to Trap Wasp Queens in Spring NZ
Casey 0 3420
Spring is the only time of year a wasp queen is on her own. She's out of hibernation, building a small nest by herself and feeding her first larvae with no workers to back her up. Catch her now and that nest never forms, which means no colony of thousands and no new queens next autumn. ✓Queens are active from early spring, roughly September to..