Using neem leaves instead of oil

[Marcin]

Neem oil spray kills many citrus pests but it can also damage the plant, especially when used during hot weather. It seems that neem leaves make a good insecticide as well, and such leaf extract spray shouldn't cause any harm to citrus, so it can be used year-round.
http://www.oisat.org/control_methods/plants_in_pest_control/neem.html
https://www.youtube.com/watch?v=ENpjyM46ViY

Has anyone tried spraying citrus with neem leaf extract instead of neem oil? If yes, did you use fresh leaves or dried? And how did it work?

[waxy]

I've used a combination of water, neem oil and orange oil.
5 gallons, 1 table spoon of each oil.

I only use it during a cool cloudy day or even the evening when the sun is down.
Spraying during the day is not only a bad idea, but it'll prevent bees from pollinating your flowers.

[Millet]

Neem works well, but I don't like the smell.  I always use Ultra Pure horticultural oil to control aphids, mealy bugs, thrip and scale.