島根大学農学部
島根大学農学部研究報告

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島根大学農学部研究報告 Volume 14
published_at 1980-12-15

桑条表面で越冬するクワ裏うどんこ病子嚢穀の空間分布

Spatial Distribution of Perithecia of Phyllactinia moricola Wintering on Mulberry Twig
Nagasawa Sumio
Ushirokita Mineyuki
Kusunoki Shinji
Kondo Masahiko
Yamashita Hiroki
full_text_file
d0030014n020.pdf ( 1.08 MB )
Descriptions
The spatial distribution of perithecia of Phyllactinia moricola(P. Henn.) Homma wintering on mulberry twigs was well fitted by the mathematical modelvof negative binomial distribution. Fitting a common index of dispersion k_c, however, was impossilble to all series of negative binomial distributions. The method of Nass provided a suitable goodness-of-fit criterion for the negative binomial distribution when expectations are small.