Hazel in the Gironde estuary, France
In reply to Noisette:
Hazel C said:Box-moth caterpillars
Is that Cydalima perspectalis Noisette? If so, what are you using against that?
In reply to Miroslav R.:
We think that the Parus Major citations were in Ornis and BioTerra. My partner's writing to them today to check that out.
In reply to Dave - CH:
Dave - CH said:
Hazel C said:
Hi Dave, Yes it is & it's causing huge damage, especially in the wild. In public gardens they are using a chemical that means the area has to be closed to the public for 6 hours, not my idea of a solution.
In our garden we cut the bush down to about quarter height & its been ok, slowly growing back, but they came back last year. On the insect forum they came up with a purée of dead adults, diluted & sprayed on the bushes, but I'm not sure whether it worked.
Hazel C said:Hi Dave, Yes it is & it's causing huge damage
Hmmm... thought so.
It really kicked off here around five or so years ago, having (I have it on reasonable authority) come in on infected plants at the airport in Basel around 13 years earlier.
The damage is absolutely shocking. And it's so common that I'd never plant Box again (having just bought a house from a topiary enthusiast).
We're now at over 800 m and it's far less prevalent. Down at 460 or so, I would spend around three days spraying between May and autumn. Faster with a 20 L satchel-type sprayer, or with a motorized one (which does a three-hour job in 10 minutes).
Here we use a product called Delphin, made by Andermatt BioGarden. It may still be the only effective treatment available in Switzerland.
Spray twice around 10 days apart to get the full cycle. Not toxic to humans or animals (to my knowledge); so no need to close areas off.
Perhaps something to look into?
Or move up to 800m+.
Or dig up the Box and plant Yew.
Best regards -
Hazel C said: I don't worry about the box in my garden, it's the thousands of plants in the wild
Yes, of course. You are right.
I've seen a lot of damage in woodland. I don't know how long it takes individual plants to give up the ghost. I've seen Box come back from repeated infestations (over years) (where, for example, the people who "own" them simply don't care about them, and so don't treat them). But I suppose that eventually the plants will be so weak that they will simply die.
I wonder why one is stopped from taking a ham sandwich or an extra 20g of butter across a border, but we can move things like this from country to country (or continent to continent) at the drop of a hat.
I once spent an hour at the Swiss--Italien border while a border guard calculated our fine for forgetting the litre of beer that we had in the cooler. But he never talked about the plants, which we shouldn't have been allowed to import.
Practically unlimited travel (for the relatively wealthy) and huge international flows of goods probably don't help.
The garden as zoo, perhaps.
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