Vegetable Research & Innovation

Insecticides and host plants for New Zealand yam (Oxalis tuberosa)

Two field trials were carried out to examine the effect of three insecticides (applied at different dates and times) on populations of grass grubs and white fringed weevils in yam crops. They found that the treatment with Confidor against grass grubs produced good results, especially when applied late and Oats were found to be good hosts for the white fringed weevil in the pot plant greenhouse trial.