Question: I see white butterflies landing on my kale, then later green caterpillars decimate the leaves. What do I need to do to stop this from happening, since I love kale? Answer: The arrival of ...

Cruciferous plants, such as cabbage, rapeseed, horseradish or mustard, have a special defense strategy against herbivores called the "mustard oil bomb". They store glucosinolates as defensive ...