Number of pests. Six insect pest species were found in
Chinese kale plots throughout the growing season:
diamondback moth (DBM- Plutella xylostella), common
cutworm (CCW-Spodoptera litura), flea beetle (FBTPhyllotreta
sinuata), aphids (APH-Aphis gossypii Glover),
cabbage looper (CBL- Trichoplusia ni) and cabbage
webworm (CWW- H. undalis). However, repellence effects
were observed only for CWW, CCW and FBT (Table I).