Establishment potential and damage probability of Meloidogyne chitwoodi in Germany.
Determination of the establishment potential was mainly based on the availability of host plants and the influence of temperature in connection with the biological characteristics of M. chitwoodi. Analysis of these parameters revealed that the nematode could become established in many places in Germany, especially in the potato-growing regions. On the basis of temperature accumulation, 2 or 3 generations of the nematode may be possible in Germany; but completion of a 3rd generation or possible hatching of a 4th would be restricted to a few places and to climatically favourable years. The multiplication rate and damage probability of M. chitwoodi seems to depend mainly on weather conditions in spring and temperature accumulation during the vegetation period. Damage probability decreases from west to east in the northern lowland of Germany, where the main potato growing regions are located. The coastal regions are less at risk.