How can I keep potato tuber moths off our spuds?
With difficulty. The potato tuber moth is a worldwide pest found throughout NZ. And sprays aren’t much use, with up to six generations per year to contend with. Potatoes planted too shallow or exposed through cracked soils are more likely to be attacked, so plant them in a trench around 20cm deep before covering with 10cm of soil. Then keep earthing them up, which prevents frost damage as well as foiling the moth in the meantime. Frequent watering also helps. If you have a garden question email Glenys at