Mealybugs are best controlled when detected early. Scout especially just above the fruits underneath the dried up remains of the flower.At an early stage they can be squashed and whiped off by hand. They can also be washed off with a strong waterjet from a hosepipe. The water can mixed with a small amount of liquid dishwashing soap (1 Tablespoon per 5 liter).
For a stronger infestation you should still need to be careful not to use a pesticide that will also harm beneficial insects. One of the most powerful helpers in your plantation is a small black ladybug, called Cryptolaemus montrouzieri, with a bright orange head. This beetle and its larvae feed exclusively on mealybugs and will clean your plantation if left in peace to multiply without being disturbed. You need to be very careful to distinguish between the pest and the beneficial, as the larvae of the mealybug eating beetle almost looks like a mealybug itself. It can be found in the middle of mealybugs, on which it feeds and can be distinguished by its slightly bigger size.
The other option is made from 1 garlic bulb, 1 small onion, and 1 teaspoon of chili powder (or any multiple of it). Process all ingredients together into a paste, either with a food processor or with a mortar and pestle. Mix the paste with 1 litre of water and let it steep for 1 hour. Strain through a cloth to remove any parts that could clog your sprayer and add 1 tablespoon of liquid dishwashing soap. Mix well. Spray on all infested areas. Repeat weekly if necessary. Only if infestation can not be controlled within a month you should consider using chemical pesticides.