Anthony Wain was convicted last week of spraying Roundup around nine of the 18 holes at Bloxwich Golf Course, Walsall, in September.
Club secretary-manager Rob Wormstone said: "Brown scars will have to be reseeded next year. It could cost £10,000 to repair."
The club wrote to the gardeners of 15 allotments on its land proposing to increase rents from £10 a year per allotment, charged since 1977, to £100.
Wain, who turned himself in to Wormstone after the attack, said he thought allotment holders were being thrown off the land.
Wormstone said the damage was covered by insurance.
Walsall magistrates' court ordered Wain to pay £1,000 compensation and costs, and to undertake a 12-month community order. This includes doing 160 hours of unpaid work and obeying a two-month 7pm-to-7am curfew.