In the past it was the practice for gardeners to get out the chemical
sprays as soon as a pest or disease problem was noticed but nowadays, thankfully, we are much more enlightened and as a result lean towards safer chemical products or natural remedies to do the job.

Listed in the article are a few home-made remedies but I hasten to point out that some recipes contain products which are not totally harmless to humans, predators or the environment so care needs to be taken in their use and storage.