National Institute of Agro-Environmental Sciences

Fruit Tree Research Station, 237 Institut National de la Recharche Agronomique, 353 Mycogen Corporation, 105 National Institute of Agro-Environmental Sciences, 237... 

We thank Dr. Miyoshi of the Department of Applied life Science, Kyoto University, for the study of the mode of action of penthiopyrad, and Dr. Ishii of National Institute of Agro-Environmental Sciences for work on the resistant fungi. 

The National Institute of Agro-Environmental Sciences, Ministry of Agriculture, Forestry, and Fisheries. Fertilizer Control Law of Japan, Tsukubchshi, lbaraki4ien, Japan. 

Chemical Ecology Unit, Department of Biological Safety, National Institute of Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, Ibaraki 305-8604, Japan... 

Soil samples were taken from the experimental field in which spinach is cultivated at the National Institute for Agro-environmental Sciences, Tsukuba, Japan. The top 10 cm of soil was collected from 15 points and then mixed, air-dried, and passed through a 2-mm sieve. For comparison, surface soil was also taken from the adjacent non-cultivated land. The soil classification based on the world reference base for soil resources is Andosols. Relevant soil properties are shown in Table 1. A distinctive feature of this soil is a high amount of organic matter and a higher capacity for phosphate adsorption due to the presence of non-crystalline minerals. 

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