KILIMANJARO, June 13 -- FOR decades, rice farming has been a reliable source of income and food security for thousands of households across Tanzania. From the irrigated plains of Mabogini in Kilimanjaro region to the vast rice fields of Morogoro, Mbeya and the Lake Zone, farmers have depended on the crop to sustain their livelihoods.

Today, however, a tiny insect no larger than a grain of rice is emerging as one of the biggest threats to the countrys rice production. The Yellow Sugarcane Aphid (YSA), scientifically known as Sipha flava, is rapidly spreading across Tanzanias ricegrowing regions, causing severe crop damage and threatening the incomes of thousands of farmers.

Researchers warn that unless effective and sustainable control m...