Phosphine Resistance Spreads Across Major Producing Regions
Populations of lesser grain borer and red flour beetle showing reduced susceptibility have been documented across India, Australia, Brazil, and China, with roughly 37% of tested populations now affected to some degree. Decades of partial exposures in leaky structures selected for it steadily. Resistant populations require longer exposure and higher concentration, which raises consumption in the short term and threatens the active entirely in the long term. No replacement exists at comparable cost for bulk grain storage anywhere. Suppliers benefit commercially from higher doses in the short run and lose the active entirely in the long one.
Market Impact: Treatment costs USD 1.90 per tonne








