For Mealybugs, at least two applications are required, the first to remove their protective wax and a second to kill the mealybug. Heavy infestations of pests like Spider mite and Whitefly will require more than one application. If predators are present, repeated applications will harm their development, so try to use before their introduction or on areas of the plant where predators and parasites are not present. No harmful residues will be left on the plant to harm them. Do not spray on open blooms or mix with other products. Also avoid spraying in hot conditions to avoid scorch.
Dilution rate is different for the concentrated products;
500ml concentrate; 10ml concentrate to 1 litre of water
1 litre concentrate; 1ml concentrate to 1 litre of water