k{aQ --- The Society of Plant Protection of North Japan

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Annual Report of the Society of Plant Protection of North Japan: Contents


No.22i1971j

Oku, T., Kobayashi, T. & Maeta, Y. Fluctuation in the Population Density of the False Melon Beetle, Atrachya menetriesi Falldermann, in the Grassland I 11

Oku, T., Maeta, Y. & Kobayashi, T. Fluctuation in the Population Density of the False Melon Beetle, Atrachya menetriesi Falldermann, in the Grassland II 18

Kobayashi, T. & Oku, T. An Outbreak of the Spotted Spittle Bug on the Orchardgrass and its Insecticidal Control II 24

Sakamoto, Y. Notes on Japanese Species of the Genus Hypera Injurious to Leguminous Pastures 27

Imabayashi, S. The Brown Wheat Mite, Peterobia latenes(MULLER), in Hokkaido 35

Sasaki, T. & Kato, H. Climatic Factors and Synoptic Weather Charts Concerning the Initial Stage of Ocurrence of Leaf Blast on Rice Plants in the Paddy Fields 38

Tanaka, S. & Shiota, H. Transmission of Potato Leaf Roll Virus by Artificial Feeding of Aphids 44

Takakuwa, M., T. Tamada, M. Makiguchi & Kimura, H. The Damage Caused by the Infection of Water Melon with CGMMV-W at Several Stage of Plant Growth 47

Suzuki K. and Kumagai T. A Sin Ipe Method for Forecasting the Beginning of Leaf Blast Epidemic 52