MOVEMENT FROM FIELD TO FIELD

Poor self-dispersal by nematodes is compensated by the ability of the various survival stages of nematode species (e.g., eggs in cysts or egg masses, fourth stage juveniles resistant to desiccation) to survive transportation by any soil-moving operations and in propagative plant materials. This ability can introduce infestations into new agricultural regions. For example, lettuce and sugarbeet harvesting equipment and trucks have been moved for many years in both directions between northern California, where old established infestations of sugarbeet cyst nematode occur, and the Imperial Valley, where infestations have developed more recently.

From: McKenry, M.V. and P. A. Roberts. 1985. Phytonematology Study Guide. University of California, Division of Agriculture and Natural Resources. Publication 4045.

NEXT

UNIT INDEX

MAIN INDEX