[Robin Redbreast]

i didnt really but an idea has formed or maybe an experiment! I am an hairdresser by trade and something i know to work on nits is tea tree oil!
Now i am not suggesting you put this straight on your plants but most insects that i am aware of do not like this natural oil and will steer clear of it!
I think i may put a cold glass of oil near my plants to see if it maybe beneficial to getting rid of e.g. carrot fly not dissimilar to the nit also known as pediculosis capitas, i am always interested to see if ideas that forem can create difference,just wondered if anyone would like to take this journey or maybe already has been done with what effect?

[arugula]

Interesting RRB, let us know how you get on. I've done a forum search and have seen its use mentioned in relation to onions.

[Kirpi]

maybe just a few (10?) drops neat into a dosage glass put under a plant (to keep rain out) and let the oil evaporate slowly on the plot?

[Matt31]

Would maybe a few drops of an essential oil maybe do the same job.  Something like Lavender oil.  Not an expert but just got my thinking juices going as well.

Having said that I just put a small fence of fleece or enviromesh around my carrots at my house garden and never had any trouble from carrot fly!!

As I understand it carrot fly can only fly close to the ground so a 18" high fleece fence around carrots should be ok as long as there are no gaps underneath that the little blighters can get through!!

Matt