There’s nothing plain about the vanilla market.

The price of the bean used to flavor everything from ice cream and chocolate to cola and pastries more than tripled in the past year as output slipped and quality suffered. That should have been a boon for top producer Madagascar, the island nation off Africa’s southeast coast. Instead, the government is imposing measures to improve supply and quality to protect its market share.

Vanilla demand is growing, particularly in developing countries, as Nestle and Whole Foods Market are using more natural flavors in food products. But a prolonged price slump led to smaller global harvests.

In Madagascar, which supplies half the world’s beans, farmers took short-cuts in the process to create the aromatic qualities prized by consumers.

“The branding of Madagascar vanilla in the international market is threatened,” Commerce Minister Henri Rabesahala said in a telephone interview from the capital, Antananarivo.

In recent years, after a decade of low vanilla prices, production declined in places like China, Indonesia and Uganda as farmers switched to other crops and inventories shrank, data from the United Nations Food and Agriculture Organization show. Madagascar remained a low-cost supplier because the labor-intensive harvesting and curing of vanilla remained mostly profitable, with workers paid $1.50 a day, compared with $10 elsewhere, according to Cook Flavoring Co., a U.S. processor that buys from several countries.

As prices improved, growers in Madagascar started harvesting more pods sooner than normal and packaging them in vacuum-sealed containers rather than curing and drying them. This was partly to avoid theft, but also to capitalize on the rally. The packaging gave wholesalers the flexibility to wait for higher prices as global supply shrank. But because the beans were so immature, they hadn’t fully developed the compound – vanillin – responsible for all the flavor and aroma. It was almost like picking wine grapes before their time.

With a smaller Madagascar crop last year and fewer good-quality beans, prices surged in the U.S., the world’s biggest buyer, where vanilla ice cream remains the most-popular flavor.

To discourage lower-grade beans, Madagascar agreed this month to block exports of immature green vanilla, imposed a ban on vacuum-packed pods and increased the power of local security organizations to act against transgressors.

In recent weeks, the government burned hundreds of kilograms of seized green vanilla, Rabesahala said.

Vanilla didn’t originate in Madagascar. The Aztecs were the first to cultivate it in what is now Mexico, where vanilla was mixed with cocoa to make chocolate eaten mostly by aristocrats. Early Spanish explorers initially thought it was a perfume – a use that continues today – and began exporting it to Europe. The plant would only grow in Mexico because its pollination was dependent on a type of bee unique to the country.

That changed in the 19th century when a manual pollinating technique was developed for the vine-like orchid. But it remained labor intensive because the flowers only bloom for a one day per season, requiring workers to tramp through the jungle looking for blossoms.

High prices may not last. With the rally in its fourth year, more production is on the way, and Madagascar will harvest a bigger crop this year than last, in keeping with the plant’s biennial cycle, said Lochhead at the Cook Flavoring. In 2002, prices fell from more than $500 to $15 in just a few months, once it became clear supplies were increasing, she said.

This year’s harvest in Madagascar, which begins in July, probably will rise to about 2,000 tons from about 1,200 to 1,600 tons in 2015, according to Rabesahala, the commerce minister.

The country’s National Vanilla Platform, a government and industry body created in December, is preparing an inventory of an estimated 100,000 growers, as well as collectors and exporters, as it prepares to ensure the quality of the crop when it reaches the world market later this year.

“We are very serious about this,” Rabesahala said. “We’re not joking. We don’t want to jeopardize the next campaign.”