Castile soap is the soap to use - it is vegetable-based, chemical-free, with no synthetic ingredients or animal fat. Originally made from pure olive oil in Castile, 12th century Spain. Today, it may contain other plant-based oils such as almond, avocado, coconut, hemp, walnut. It worked for us in a commercial greenhouse in Australia. In a big area like that, the white flies do come back, so it needs to be repeated.
Castile soap is the soap to use - it is vegetable-based, chemical-free, with no synthetic ingredients or animal fat. Originally made from pure olive oil in Castile, 12th century Spain. Today, it may contain other plant-based oils such as almond, avocado, coconut, hemp, walnut. It worked for us in a commercial greenhouse in Australia. In a big area like that, the white flies do come back, so it needs to be repeated.