The decision has been made to cancel the Bank Holiday Monday fixture and the meeting at Chepstow Racecourse, which has now been transferred to Bath Racecourse on the same day.
The meeting last Thursday was also cancelled as officials at the Welsh venue and clerk of the course Keith Ottesen, were concerned with some sections of the course and specialists have since confirmed an emergence of root gall nematodes.
Ottesen requested an examination of the course for 9am Monday morning, but after inspecting the track, he has decided the sections involved will not improve quickly enough for the Bank Holiday meeting and it is necessary to move the event to Bath Racecourse.
Root gall nematodes are microscopic parasitic worms who lay inactive in imported organics, such as divot repair substances. Recent wet conditions, following by warm or hot days, creates ideal situations for them to thrive, severely depleting the access of nutrients and moisture to the turf.
Ottesen said, "We don't think the track will be ready for racing next week and we're not going to take a chance having not yet eradicated the problem.
"The meeting will be transferred to Bath racecourse on the same day and we're just working on the details of that now.
"We've got more meetings to have with the scientists involved who actually know about this problem before we continue the work that needs to be done."