GLENEAGLES, Scotland (AP) England's Mark Foster shot a 6-under 66 to lead the Johnnie Walker Championship after an incomplete first round full of fog and swarming wasps.
The start was delayed by 2 hours, 40 minutes because of reduced visibility, and 51 players will have to complete their first round early Friday.
Foster held a one-shot lead over Spain's Ignacio Garrido and Argentina's Tano Goya.
Denmark's Thomas Bjorn, Ireland's Peter Lawrie and Chile's Felipe Aguilar were 4 under.
Foster has held the lead, or a share of the lead, at various stages of three tournaments this season - the French Open, the BMW International Open and the Scottish Open - but never managed to back up his win at the 2003 Dunhill Championship in South Africa.
"That could have been a special first nine holes because I three-putted the par-5 No. 16," said Foster, who is likely to make the Britain & Ireland team for next month's Vivendi Seve Trophy in Paris.
"I just have a bit more belief in myself this year. It sounds strange but I have stopped trying to win. I've stopped pitching up on a Tuesday thinking about winning - I just want to be the best I can for the week."
Foster was among a number of players affected by swarms of wasps and hover flies across the course.
"Two of the three (in his group) backed off before every shot," he said.