I have a major problem with my black tuscan kale on the plot – it is really badly infested in whitefly in spite of the expensive and hasslesome insect proof mesh I have covered them with. This has successfully eradicated all the predators from the plants while allowing the whitefly population to boom unchecked. I’d had enough on Friday so I opened it up, risking butterfly attack and even the odd pigeon. When I checked on Sunday it was full of ladybirds, hoverflies laying their eggs and parasitic wasps off all shapes and sizes and the kale and broccoli looked better already. Lesson learned.