Quote:
Originally Posted by MarkOlliethe2nd
Im having an ant problem in my tunnel, they been there since I put the tunnel up. I have sat and watched then mincing up and down the tunnel but cant track them to a specific place (nest) But they are becoming a real pain as they seem to of taken a liking to my pepper leaves. Some of the leaves that touched the ground or the side of the tunnel seemed to be most effected with them munching, I cut back a few leaves that were in contact with the ground or sides and the munching on leaves wasnt so bad, but seen as the peppers are growing more mucned leaves appear but not on my toms and they are bigger and more accessible to the ants, but they havent taken a liking to the toms.... I noticed in the garden centre ant powders where not recommended for crops, such a pain in the a**e!!!! 
(My recent tsunami did nothing either, infact the ants told me it was better then the log flume at alton towers!!!)
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Ants can be a pain in tunnels, and more especially to peppers/chillies. The clever buggers farm aphids on the plants. They'll pick them up and move them around. They even milk them like cows. They're after the honey dew that aphids secrete and tickle the aphids to make them deposit the honey dew.
The best tip I heard was to grow some mint in your polytunnel (obviously in a container planted in the ground to stop it invading) I did this last year and have not seen another ant in there since.
Don't use ant powders