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

This is the place to come to ask a question or find an answer about what is that weed and how best to deal with it for your specific circumstances.

02 Feb CONTROL MERCER GRASS IN A POND
Shayne 0 10472
Q.  We have a problem weed, I don’t know what it is called, in one of our ponds, and have been trying to get rid of it, but to no avail, it just keeps coming back, just wondering if you would have any suggestion about a suitable spray to use to eliminate it all together. I have attached a photo of the weed in the pond, and one of it close up, hopin..
28 Nov LAWN INVADER (PASPALUM)
Shayne 0 11342
Control of Invasive Lawn Weed Q.  Hello Paul & the folks at R & B.  Are you able to inform me as to the name of this invasive grass weed that is attempting to take over our lawn?It struggles to survive the winter when young, but goes for it in this hot weather.  Any suggestions for control?Enjoy your newsletter. A.  The weed in your lawn is a paspa..
28 Nov WEED IDENTIFICATION & CONTROL : OXALIS
Shayne 0 13589
Q.  Hi, I spoke to Rachael a couple of days ago In regards to a coastal weedI'm having problems getting rid of. I've tried lawn master and banvine,?,both at optimal spraying times. I hope these photos are enough for you towork with, I look forward to your reply.  A.  The plant in your pictures is definitely an oxalis species, most probably Oxalis c..
12 Nov PASTURE GROWTH SLOW AFTER SPRAYING DECISION?
Shayne 0 7800
Enquiry from a customer regarding possible causes of slow pasture growth. This follows our phone conversation of today. Situation:11 hectares affected by poor pasture growth.  2,4-D had been applied some weeks earlier.  75kg/ha urea applied the day before Decision was applied at 50g/Ha.  That was about 4 weeks ago.  The buttercups targeted by the D..
12 Nov CONTROLLING CUT-LEAVED GERANIUM AND DOVES FOOT IN PASTURE.
Shayne 0 10938
You¹ve asked about controlling cranesbill and plantains in pasture. By cranesbill I think you¹re referring to Erodium cicutarium which is actually called storksbill but it's probably called cranesbill in some local regions.  Looks as much like a crane as it does a stork, as far as I can see.  Just check the attached weed file to be sure I am on th..
12 Nov GRASSMATE APPLICATION RATES
Shayne 0 22796
In answer to a question about Grassmate from a customer about control of broadleaf weeds in lawns, Our product GrassMate is an excellent product for removing all broadleaf species, including clovers etc, from a lawn without damage to the grass. For your situation a rate equivalent to 2L/Ha is about right.  So for a 1.5 acre lawn, that's a total o..
25 Oct WHAT HERBICIDES TO USE IN CHICORY BASED PASTURE
Shayne 0 16712
CONTROLLING WEEDS IN CHICORY BASED PASTUREReply to a question on weed control in a horse pasture containg some chicory.The presence of chicory limits the herbicide choices very severely, because almost all the good broadleaf weed sprays will damage chicory.However, all authorities do agree that flumetsulam (i.e. our product “Decision") is the No 1 ..
23 Oct DECISION WITHHOLDING PERIOD
Shayne 0 8464
In answer to a question regarding the withholding period for Decision herbicide. Short answer is that it’s very low risk.  In fact it’s really only got a withholding period due to the fact that Decision will kill some poisonous weeds that then become more palatable (i.e. less repellent to taste) as they die off, but that remain poisonous even thoug..
23 Oct SUITABILITY OF GRASSMATE TO CONTROL CONVOLVULUS AMONG NATIVE SPECIES.
Shayne 0 7833
IN REPLY TO A QUESTION ABOUT THE SUITABILITY OF GRASSMATE FOR THE CONTROL OF THE CONVOLVULUS AMONGST NATIVES THAT YOU WANT TO PROTECTGrassmate is a good choice for the job, because it is effective against all the bindweeds, including field convolvulus.  And it’s not volatile, meaning that it doesn’t form a lighter than air vapour that drifts unexpe..
12 Oct WILL TRICLO CONTROL PASPALUM AND COUCH?
Shayne 0 10157
Triclo isn't registered for either paspalum or couch, but as you say it does kill kikuyu and there are some similarities between those species.You're going to have to try a small area and give it a couple of weeks to evaluate, before you try a larger area.  I have seen a couple of anecdotal references to triclopyr (i.e. Triclo) being effective agai..
06 Oct ARUM LILY CONTROL
Shayne 0 14164
In response to a cusomer question about lily control. I think you must be referring to Arum Lily?    But my advice is much the same for all lilies anyway. According to all the best authorities on lily control, you should not need the paraquat part of your proposed mix.  As an example go to the ARC (Auckland Regional Council) info page about the Aru..
06 Oct CONTROLLING GORSE IN FLAX
Shayne 0 29083
In reply to a customer question about controlling gorse in amongst Flax. I don't have a clear answer, at least not from practical experience. I once tried several weed sprays on some unwanted flax (a small stand of flax that was going to have to be removed) to see what was safe and what wasn't.  It was not a very illuminating experiment!   Glyphosa..
Showing 37 to 48 of 52 (5 Pages)
15 Jun How to Keep Horse Paddocks Healthy in NZ: Weeds, Flies, and Nutrition
Casey 0 315
Healthy horse paddocks in NZ need a three-pronged seasonal approach: weed control for persistent species like docks and buttercups, residual fly and tick management through summer, and trace mineral support to fill gaps that good pasture alone can miss. ✓Docks and buttercups reduce pasture quality and can irritate horses; treat in early spring..
28 May Foliar Fertilisation in NZ: When It Works, When It Doesn't, and How to Get It Right
Casey 0 418
Foliar fertilisation means spraying dissolved nutrients directly onto plant leaves, where they're absorbed through the leaf surface and bypass the soil entirely. It's most useful for correcting mid-season deficiencies quickly, delivering micronutrients that soil chemistry is locking up, and supporting plants at critical growth stages when you can..
10 Mar What to Use Instead of Banvine
Shayne 0 12863
Note: This article was last updated March 2026 What Can We Use Instead of Banvine(1)? Quick answer: Banvine(1) contained 200g/L 2,4-D and 100g/L dicamba. The closest ready-mixed alternative from Rainbow & Brown is LawnMate. A lower-cost option is to use individual herbicides such as WHACK – 2,4-D 800 and Rainbow & Brown Dicamba 500 SL, but any ..