Bulletin of the Faculty of Agriculture, Shimane University

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Bulletin of the Faculty of Agriculture, Shimane University 14
1980-12-15 発行

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
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Description
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.