No.21 (1970)
Tanaka, S. & Shiota, H. Transmission of Potato Leaf Roll Virus by Different Strains and Form of Green Peach Aphid (Myzus pericae SULZER) 1
Hukusima, S. & Miyafuji, M. Life Histories and Habits of Misumenops tricuspidatus FABRICIUS(Araneae : Thomisidae) 5
Kobayashi, T. & Oku, T. An Outbreak of the Spotted Spittlebug on the Orchardgrass and Its Insecticidal Control. 13
Ujiye. & Wakou, M. Residual Toxicity of Several Pesticides Against the Adult of Holcothorax testaceipes RATZEBURG (Hymenoptera : Encyrtidae) 17
Yanagita, K & Yaegashi, H. Effects of Primary Infection on the Resistance of Rice Plant to Blast Disease 21
Mogi, S & Yanagita, K. Reactions of the Zenith type Varieties of Rice to Races of Pyricularia oryzae in Japan 24
Takakura, S. & Yamamoto, T. Studies on the Nematode Genus Hirschmanniella I. The seasonal Fluctuation of the population Dencity of Hirschmanniella oryzae and H, immamuri in Hokkaido 27
Katube, T. & Koshimizu, Y. Node Blast due to Lodging of Rice Plant 32