Some times garlic is a good remedy. You can use dry garlic, is very important that it does not contain salt. Also you can use fresh garlic. 1/2 spoonful of tea in a liter of water to sprinkle the plants. Also it is possible to use this solution for irrigation.

It may work in some pest, not all, but its easy to use and its safe... Odor is a problem, but it may vanish in 10-14 days.