In continuation of the cultivation tests carried out in 1950 and 1951, cultivation tests on
Chenopodium ambrosioides L. var.
anthelminticum A. Gray were carried out in cooler regions, i.e. highlands of Nagano Prefecture, Tohoku districts, and in the Hokkaido, during 1952. Distillation tests and determination of ascaridol were carried out on the crop and the summarized results of tests carried out during the three years are as follows:
1) Growth, yields of crop and fruits, content of essential oil, and content of ascaridol during 1952 are shown in Table I. Atmospheric temperature and rainfall in various regions during this year are shown in Table II.
2) It was found that the growth, especially at the outset, is retarded in the cooler regions, compared to that in the standard plot, but the yields of crop and fruits are not necessarily inferior to those of the warm region.
3) The contents of essential oil and ascaridol are also not necessarily inferior in the crop from the cooler regions to those from the warm region.
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