Monday 20 June 2005 3.24pm
A big powerful hand sprayer, filled with soapy water, is the standard organic response. Works well on the aphids on our tomatoes, but I expect you might need a fairly strong blast to get rid of caterpillars.
Otherwise it's a case of picking them off by hand, or of getting a tame bird (or other predator).
...if you press it, they will come.