From 1993 to 1995 the effectiveness of various insecticides applied as
a seed-coating to control Thrips tabaci in winter leeks (Allium porru
m L.) was investigated in the field. Seed-coatings with fipronil and i
midacloprid gave a good control, but carbofuran, diflubenzuron, methio
carb, teflubenzuron and vamidothion were not effective. The most effec
tive insecticide, fipronil, did not cause phytotoxicity, whereas imida
cloprid reduced and slowed germination. (C) 1997 Elsevier Science Ltd.