Japanese knotweed?

daveyjp

To ensure knotweed won't spread it needs to be buried in a pit at least 5m deep, covered with teram textile and back filled with each backfill layer rolled.

Any barrier system will be completely ineffective.

kinger101

glasgowdan wrote: »

I'm a professional ground maintenance contractor with first hand experience of eradicating knotweed.

Any experience on mare's tail? It think's glyphosate is food so I'm trying some rather expensive glufosinate (Kurtail) at the moment. Plan C is ammonium sulphamate.

TheGardener

kinger101 wrote: »

Any experience on mare's tail?

This plant has a silicone like coating that is water resistant to spray - the only way any spray will work on this plant is if you bruise it first - batter it with sticks - get kids to play football on it - anything to bruise and break the surface of the leaves before you spray it.

Dan83

There used to be a chemical called para-quat or something like it. It kills everything, but is now banned in the uk, I've seen it for sale on Chinese sites.

If you know anyone is the chemical industry, ask if they can get hold of some, or search old relative's sheds for weed killer from the 80's.

Perelandra

From personal experience with weedkillers on horsetail:

Glyphosate (Roundup / Gallup) is inneffective in consumer-level concentrations (Roundup), but in agricultural strengths it can be effective. Requires bruising of the plants.

Glufosinate-ammonium (Kurtail Gold) will scorch the visible plant, turning it black and dead, but plant will regrow the following year, as the root is not targetted. Can only be applied by qualified professionals, and not amateur gardeners. It's a nasty chemical.

Ammonium sulphamate (Root-out) is effective, although some re-application is needed the following year. Does not require plant bruising, and is classified as "non-hazardous". However, it's no longer legal to use this as a herbicide in the EU. It can be bought as a compost accelerator.

deFoix

The "professionals have access to industrial strength glyphosate" argument is stupid. You can buy Roundup Concentrate and make the solution as strong as you want - however it's better to follow the instructions as if the solution is too strong it won't be taken down into the roots of the plant and be as effective.

You can easily eradicate a bush of JK like that yourself over a few seasons. The glyphosate is effective if you spray just before the plant flowers (end of growing season) on both sides of the leaves.

There is NO need to pay thousands to get it done by a 3rd party.

Regards,

co-op_lover

glasgowdan wrote: »

I'm a professional ground maintenance contractor with first hand experience of eradicating knotweed.

Lies I'm guessing

Davesnave

Dan83 wrote: »

There used to be a chemical called para-quat or something like it. It kills everything, but is now banned in the uk, I've seen it for sale on Chinese sites.

If you know anyone is the chemical industry, ask if they can get hold of some, or search old relative's sheds for weed killer from the 80's.

Why the 80s? Paraquat wasn't banned in Europe until well into the noughties. It's still used in food production in less regulated parts of the world, where its links with Parkinson's disease are maybe of lesser concern.

Anyway, it isnt terribly effective on deep-rooted weeds, so it's likely JK would not be fully controlled.

hammergirl28

We didn't buy a property because of this issue you need it removed by a professional it's expensive and takes years and if you allow it to spread onto another persons property boundary you could be subject to a £5000 fine or up two two years in prison.

moneyistooshorttomention

hammergirl28 wrote: »

We didn't buy a property because of this issue you need it removed by a professional it's expensive and takes years and if you allow it to spread onto another persons property boundary you could be subject to a £5000 fine or up two two years in prison.

...and I am certainly watching that one with interest - as a friend of mine has found JK in her garden and its very clear its got there by spreading in from the next door property.

As you can imagine - I'm urging her to "go for it" regarding dealing with this antisocial neighbour:cool:.