It’s not just avocados.

President Trump’s threat to impose new tariffs on Mexican imports could affect prices for cars, televisions, clothing, alcohol and the fuel that Mexico regularly sends to the United States.

The tax, which is meant to take effect on June 10, would start at 5 percent and “gradually increase” unless the flow of undocumented immigrants across the United States border is stemmed, Mr. Trump said Thursday while announcing the tariff on Twitter. It could rise to 25 percent.

Several business groups — including corn growers, pork producers and retailers — pushed back. The United States Chamber of Commerce called it “exactly the wrong move.” The head of the National Association of Manufacturers said it was a “Molotov cocktail of policy.”

Mr. Trump also recently threatened to close the border entirely, jeopardizing nearly $1.7 billion in products and services that traverse it each day. Many items are made in Mexico using materials or parts first produced in the United States. And no country supplies the United States with more agricultural products.