White oils
Oils with a narrow heat extraction range; they are almost harmless to plants but toxic to many pests, especially scale insects. The oils probably asphyxiate their target insects by blocking their spiracle and may also be toxic.
Oils with a narrow heat extraction range; they are almost harmless to plants but toxic to many pests, especially scale insects. The oils probably asphyxiate their target insects by blocking their spiracle and may also be toxic.