Agricultural insecticides were a key factor, according to a study focused on the Midwest, though researchers emphasized the importance of climate change and habitat loss.

Readers recount their experiences coping with the disease. Also: A mother’s dementia; the B.D.S. movement; dangers of factory farms.

Here’s who needs to worry right now.

La medida, motivada por el temor sobre la seguridad de los trabajadores del Departamento de Agricultura de EE. UU., podría acabar afectando los suministros de aguacate en el país si no se reanudan las inspecciones.

Archaeologists discovered the glass bottles in the cellar during a restoration project.

The move, prompted by fears for agency workers’ safety, could eventually affect U.S. avocado supplies if the inspections are not resumed.