The stem borer and its relatives steal the livelihood of millions of small corn farmers.

Last year at least 125 Kenyans, most of them children, died from eating corn with toxins created by the stem borer.

Kenya has just begun trials of a corn identical to the local variety but carrying genes that increase its resistance to the stem borer.

Maybe a stem borer has gotten into the plant.

In colder climates, planting of squash is often delayed for the same reason, to avoid invasion by stem borers.

The larva then continues feeding as a stem borer.

They mainly live as a stem borer, but when almost fully fed it lives in a case for a short while.

Larvae are oligophagous stem borer, feeding on the stems of plants.

The later instars are stem borers, primarily within the galls.

There could be stem borers, root problems and other causes.