One of the most vexing pest problems facing California growers is a group of microscopic worms called nematodes, which suck away at the roots of fruit and nut trees, vines and vegetables, and nursery crops. With diminishing options for controlling these pests chemically, research into alternatives is increasing. "This is a timely and important issue," says Howard Ferris, chair of the nematology department at UC Davis. "The use of methyl bromide, one of the major pesticides used for control of crop-damaging nematodes, is being examined because of its potential human health threats and because it is suspected of contributing to the earth's ozone depletion." Ferris and other UC scientists will bring the state's pest-control professionals up-to-date on nematode research and control March 25 at the 25th annual California Nematology Workshop in Stockton. Topics will include a nematode nursery control program, the status and future of methyl bromide, biological control, the use of nematodes to control insects, nematode parasites of animals, nematode symptoms, diagnosis and identification, sampling for nematodes, and new methods for applying nematicides.