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Rampant Growth of Weedy Rice Threatens Asia’s Rice Production, Causing Up to 80% Harvest Loss

Weedy Rice

Asia’s historic role as the world’s supplier is under siege by an unexpected adversary: weedy rice, a troublesome relative of the beloved staple. With a texture unfit for consumption and a knack for outcompeting regular crop varieties, weedy rice has wreaked havoc on harvest quality, yields, and market value across the region.

The Rise of Weedy Rice

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According to South China Morning Post, originating from unclear sources, rice has gained prominence in the past two decades, with many suspecting its lineage to hybrid varieties introduced in the 1980s. Its aggressive growth and ability to hybridize with wild rice varieties have made it a formidable foe for farmers.

A major weedy rice infestation can decimate crop yields by over 80%, resulting in significant economic losses for producing nations. The US alone witnessed crop losses equivalent to feeding 12 million people due to rice damage in recent years.

Challenges and Countermeasures

Efforts to combat weedy rice have been met with challenges, as some varieties have evolved to withstand herbicides, rendering traditional control methods ineffective. Thai farmers have resorted to various strategies, including cutting rice panicles and using chemicals, but long-term solutions remain elusive.


Industrialized agriculture and mechanized farming practices have exacerbated the proliferation of rice, hindering manual weed removal efforts. Even regions like South America have felt the impact, with Brazil reporting crop production setbacks due to rice infestations.

Looking Ahead

Combating the weedy rice menace requires enhanced farmer education and stricter herbicide regulations. Alongside innovative breeding techniques for resistant rice varieties. This holistic approach aims to effectively mitigate the spread of rice. Failure to curb its spread could have dire consequences for Asia’s rice-dependent economies.

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