In contrast to Pyrethrum which works as a contact insecticide, Neem oil works on ingestion. Neem oil isn’t effective unless the insect swallows the product, making it less effective than Pyrethrum.
In contrast to Pyrethrum which works as a contact insecticide, Neem oil works on ingestion. Neem oil isn’t effective unless the insect swallows the product, making it less effective than Pyrethrum.