No need. Lotus white refers to kale. Kale is a cruciferous, brassica plant. Kale should mainly control aphids, cabbage greenfly, small cabbage moth and other pests, do not need to prevent root nematodes, because kale rhizome is shorter, root nematodes can not gnaw and lay eggs. Root nematode, also known as the root knot nematode, is an insect of the phylum Animalia, nematode, is a pest that harms the root of vegetables.