Posted: 23/01/2014 at 13:29
I have tried, really tried, to control weevils in my small garden, my neighbour doesn't bother and sadly, as fast as I remove mine completely, his continue to thrive because downcast be bothere to treat.
The past 2 years I've only used nematode a in spring and autumn. They seem to work well. Unfortunately, this year less so and I am noticing many new notches in a container- grown evergreen and around my photinia, heucheras and a climbing rose.
i can't re-treat with nematodes now, as the soil is too cold - should I try something else like Provado?
i know it's lethal for wildlife, which is why I've never used it, but it is winter and I'm hoping some kind soul on here will put my mind at rest and assure me I'm not a mass-murderer of pollinating insects!
I do have a couple of resident frogs hibernating somewhere in the garden as well, so I'm keen not to use anything that would harm them...does anyone know if chemicals like Provado stay in the soil for a long time? Will they destroy the grubs?