Weeds of the Pacific Islands.
The history of weed invasions in the Pacific Ocean islands is discussed, together with the mechanisms by which they have dispersed or been spread. The relationships between weeds and crops are considered. The physical, socioeconomic and technical constraints to weed control are outlined. Eighteen major weeds in the region are described, and for each, information on life history, habitat preferences and pest status is given. Control methods for the 20 most important weeds in the region are outlined. A checklist is presented of weeds collected during surveys conducted in Apr.-Jun. 1988 and Jun. 1990 to identify weeds of Pacific Ocean island countries and territories; the first survey covered Melanesia and Polynesia, while the second concentrated on Micronesia. A total of 517 species of weeds recorded are listed by family, together with common names and synonyms. The distribution and relative importance of the weeds in the countries and territories surveyed, and in the main cropping systems of the region are also given.