''Farm owners are planting less because they are selling less, since people are buying less,'' said Alger, whose business is one of South Florida's largest growers of sweet corn and trees for landscaping. ``Nurseries are dying because of the real-estate crisis.''

Last year, at the height of the immigration reform debate, Commerce Secretary Carlos Gutierrez warned that without enough foreign workers, landscaping, farms and healthcare companies would suffer.

''We will see rotting fruit,'' Gutierrez said in June 2007. ``We will see lawns that don't get cared for. We will see patients who don't get cared for.''

IMMIGRANTS' STORIES

From Homestead to Fort Lauderdale to West Palm Beach, the stories of undocumented immigrants confirm the findings of immigration experts that an increasing number of illegal workers are leaving and a decreasing number are arriving.

''The economy is no longer working,'' said William, a 28-year-old Guatemalan who seeks work daily at a laborer pickup site on U.S. 441 near Interstate 595 in Broward County.

He was one of about two dozen undocumented workers interviewed over the past two months in South Florida.

William, who asked that his last name not be published because he feared discovery by authorities, said he was saving money to buy a plane ticket home.

So was Lázaro Rodríguez, of the Mexican border town of Matamoros, across from Brownsville, Texas.

''I used to send about $500 every two weeks home when work was good, but now I send $50 here or $100 there,'' said Rodríguez, 46, who stands at a laborer pickup site in West Miami-Dade, on Bird Road near Florida's Turnpike.

LIMITED INCOME

Rodríguez said he doesn't earn enough to send money to his wife and children because he can't find work as easily as when he arrived after crossing the Rio Grande on a smuggler's boat two years ago.

As Gaspar contemplates future possibilities, Tina Reyes -- his wife -- remains in South Miami-Dade with their four children, two born in Mexico and two in Miami.

Reyes hopes that the economy will improve and that President-elect Barack Obama will resurrect immigration reform after taking office.

''For now, all we have is hope,'' she said.

Reyes, who works in a South Miami-Dade nursery, said the economic crisis has eroded her family's income -- from about $800 a week six months ago to less than $300.

''I still have my job, but managers have cut hours,'' Reyes said in an interview at her home, two weeks after her husband had left for Zimatlán de Alvarez.

Jobs started to vanish six months ago.

''Until then, I worked every day,'' she said. ``In recent months, I was only able to work once or twice a week.''

While the case of Gaspar and his family offers only a microscopic example of a larger trend, the departure of foreign workers could further weaken an already ailing economy.

''It's not just the undocumented who are returning home, but also the documented, investors, entrepreneurs and managers of international companies,'' Fox-Isicoff said.

FEAR OF DISCOVERY

Gaspar intends to return to South Florida, but he is not sure that he could sneak across the border as easily as he did in 1996, when he used a migrant smuggler to enter the United States west of Sasabe, across from Arizona.

''My greatest fear is getting caught by immigration authorities after crossing the border,'' he said.

Like Gaspar and his family, most of the undocumented immigrants interviewed had crossed the border with the help of a smuggler, sneaking in near Sasabe.

Gaspar worked in Oregon, picking strawberries, before heading to Florida in 1997.

Within two years, he had saved enough money to bring his family to this country.

INCOME DOUBLED

Life was hard at first. But problems in adapting to South Florida were outweighed by an increase in family income.

''Back then, there was a lot of work,'' Gaspar recalled. ``When I was by myself, I earned about $300 per week, and when my wife arrived, we doubled our income.''

Residential developments, part of a hot real-estate market, began to swallow farmland.

''The first to disappear were the lemons,'' Gaspar said. ``Then other vegetables vanished. Now, we barely make $150, or less than $300 a week between the two of us.''

By October, Gaspar was back in Zimatlán de Alvarez, taking care of his mother -- and scouting the local job market in case the situation in the United States does not improve.

''If we can no longer make ends meet, we'll come back,'' Gaspar said. ``The idea would be to have a plot of land and plant corn, beans or flowers to sell, while my children, who speak English well, work in the tourist hotels.''

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