The pumpkins were stolen either late Sept. 30 or early Monday at the Rottkamp Farm in Calverton, the New York Daily News reported Saturday.
"Obviously, whoever took them is going to sell them," said Detective Timothy Hubbard of the Riverhead Town Police.
"I can't imagine anybody having another use for 600 pumpkins," he added. "That would be a lot of pie."
Ray Liotta sues skin care company over use of likeness
Aaron Carter is still in love with Hilary Duff