No.38 (1987)

MATSUMOTO, Y. : A way to discovery of a potent attractant from the host selection studies 1

IWANO, M. : Variation in virulence and aggressiveness of mutation isolates in rice blast fungus 5

IWANO, M. : Biological control of blast disease through resistance of rice plant induced by incompatible strain of blast fungus 10

LI. J. L., and FUJITA, Y. : Races of rice blast fungus isolated from Oomagari, Senboku area and Sannai-village of Akita prefecture in 1986 12

HORINO, O. and SHINDO, K. : Relationship between the occurrence of spikelet blast and the lapse of day after heading of some rice varieties with different resistance genes and different level of field resistance 14

HONKURA, R., INOUE, T. and OIKAWA, T. : Fungicide sensitivity of Pyricularia orizae Cavara to IBP, EDDP, and Isoprothiolane 19

HONKURA, R., TSUJI, H. and MIURA, Y. : Distribution of fungicide resistant strains of Pyricularia orizae Cavara in small area 23

SUZUKI, H., TAKAHASHI, S., FUJITA, Y. and SONODA, R. : Yield loss by transplantation of elongated rice seedling infected with bakanae disease fungus 26

OHTA, K., IMAI, T., OIKAWA, K., and SHIMADA, K. : Distribution of benomyl-resistant strains of Gibberella fujikuroi (Sawada) S. Ito in Aomori prefecture and effect of seed-treatment fungicides for control of benomyl-resistant strains 29

TAKADA, S. and OGAWA, K. : Influence of the wetting period of leaf sheath on the lesion development of the sheath blight of rice plant caused by Rhyzoctonia solani Kuhn 33

TAKEDA, T., TOHKAIRIN, H. and FUJITA, Y. : The development of sclerotium diseases of the rice plant in consolidated paddy field 36

NAGANO, T., HONKURA, R., FUJISAKI, Y. and SATO, S. : Control of rice stripe disease in Miyagi prefecture 38

SASAKI, T. : Studies on the ecology of bacterial canker of tomato 3. Dissemination of causal bacteria from contaminated seeds and seedlings in the nursery bed 40

SASAKI, T. : Studies on the ecology of bacterial canker of tomato 5. Relations between occurrence of symptoms and growth of pathogenic bacteria in solanaceous plants 43

MASUDA, T., HONKURA, R., MAEDA, M. and OTOMO, Y. : Studies on the ecology and control of leaf spot of strawberry I. Occurrence of leaf spot and temperature response of the pathogenic fungus, Mycospherella fragariae (Tul.) Lindau 45

ISAWA, K. and OYAMADA, M. : The first occurrence of downy mildew on salt-wort (Salsola komarovii Ilijin) in Japan 48

ISAWA, K., HIRAYAMA, S. and KIMURA, T. : The chemical control of downy mildew of salt-wort by Peronospora sp. 51

OIKAWA, K., KUWATA, H. and SHIMADA, K. : Mycocentrospora acerina (Hartig) Deighton, conidial state of the causal fungus of black root rot of carrot in Japan 54

TAKEUCHI, S. : Efficient identification of F. oxysporum f. sp. raphani using Daikon seedling 57

KIMURA, S. and KODAMA, K. : Population growth of uredium of Puccinia allii on welsh onion leaves in the paddy field 60

HAYASHI, S. and OCHIAI, M. : Studies on the ring rot of apples 5. Difference in susceptibility to the disease among apple varieties 63

SATO, S., NAKATANI, F. and HIRARAGI, T. : Effects and treatments of eradicant fungicides on trunk lesions formed by causal fungus of the ring rot of apples 65

NAKATANI, F. and HIRARAGI, T. : Occurrence of canker of dwarf apple trees caused by Phomopsis mali 68

OSANAI, M., SUZUKI, N., FUKUSHIMA, C. and TANAKA, Y. : Reduced sensitivity to captan of Alternaria mali Roberts 72

MITSUEDA, T., HANEDA, H. and MATSUZAKI, I. : Effect of organic materials application to the soil on root-infecting fungi 5. Antagonism against four soil-born pathogens of the microorganisms isolated from silkworm-faces and the soil applied silkworm-faces 75

MATSUZAKI, I., HANEDA, H., and MITSUEDA, T. : Effect of organic materials application to the soil on root-infecting fungi 6. Effect of antagonistic microorganisms application to the soil on occurrence of the soil-born diseases 77

WATANABE, K., SAITOH, T., ENDO, S. and SHOJI, T. : Analysis of yield loss caused by the rice water weevil, Lissorhoptrus oryzoophilus Kuschel in Yamagata prefecture 80

FUJISAKI, Y., NAGANO, T., TAKANO, T., KIDOKORO, T, YASUI, T. and MIURA, M. : A yield decrease on rice by rice water weevil, Lissorhoptrus oryzophilus Kuschel, in Miyagi prefecture 83

TAKEDA, M. and NAGATA, T. : Flight muscle development and immigration of the rice water weevil, Lissorhoptlus oryzophilus, in relation to day-degree accumulation 85

NAGANO, T., FUJISAKI, Y., HONKURA, R. and OIKAWA, T. : Rice water weevil, Lissorhoptrus oryzophilus Kuschel, parasitized by green muscardine fungus, Metarhizium sp. 90

IITOMI, A. : Reproduction of the white-backed planthopper, Sogatella furcifera Hovath on the late-season culture of rice 92

ARAYA, E., FUJIMURA, T., KIMURA, T. and ICHITA, T. : Migration of the white-backed planthopper, Sogatella furcifera Horvath, to Aomori prefecture in 1985 and 1986 96

SAITO, T. and FUSE, H. :Yield losses of rice caused by sucking on the small brown planthopper, Laodelphax striatellus Fallen 101

TAKEDA, M. and NAGATA, T. :Seasonal fluctuation of antibiosis to the green rice leafhopper, Nephotettix cincticeps, in the resistant parent lines of rice 103

HAYAKAWA, H., TSUTSUI, H. and GOTO, C. : Wireworms infested on maize plants at the Tokachi district in Hokkaido 107

SHIMIZU, K. and MITSUI, Y. : Varietal difference of azuki bean and kidney bean in susceptibility to the races of the soybean cyst nematode, Heterodera glycines Ichinohe, 1952 109

HAYAKAWA, H. TSUTSUI, H. and GOTO, C. : Studies on the biology and control of the seed-corn maggot 4. Effect of application methods of insecticides on control of the seed-corn maggot in soybeans 111

ARAYA, E., ICHITA, T. and FUJIMURA, T. : Correlations between atomospheric temperatures in July to September and injury of cultivars, of the soy bean by the soy bean pod border, Leguminivora glycinivorella Matsumura 113

TSUTSUI, H., HAYAKAWA, H., GOTO, C., HARA, Y., and YAMASHITA, Y. : Control of the foxglove aphid, Aulacorthum solani Kaltenbach, on potato plants by low volume application of insectsides 117

HAYAKAWA, H., TSUTSUI, H. and GOTO, C. : Scarabid beetles as soil insect pests captured by a light trap at the upland farming center of the Tokachi district in Hokkaido 121

KOHNO, K., HIRAI, K. and KEGASAWA, K. : Effects of light sources and setting positions on the number of phytophagous scarab-beetles attracted by light traps 125

TSUTSUI, H., HAYAKAWA, H. and GOTO, C. : Relationship between the damage of sugar beet by the spotted cutworm and the vegetational environoment in and around fields 127

GOTO, C., TSUTSUI, H., HAYAKAWA, H., HARA, Y, and YAMASHIMA, Y. : Control of cabbage armyworm, Mamestra brassicae Linne, on sugar beet by low volume application of insecticides 129

HONDA, K. and MIYAHARA, Y. : Estimation of the hibernating areas of the diamond-back moth, Plutella xylostell Linne, in the Tohoku district 133

KIMURA, T., FUJIMURA, T. and ARAYA, E. : Overwintering of the diamondback moth, Plutella xylostella Linne, in Aomori prefecture 1. Field reseach on survivors after winter 135

KIMURA, T., FUJIMURA, T. and ARAYA, E. : Overwintering of the diamondback moth, Plutella xylostella Linne, in Aomori prefecture 2. Overwintering of adults, larvae and pupae released in a field or in a glass house before winter 138

KIMURA, T., FUJIMURA, T. and ARAYA, E. : Overwintering of the diamondback moth, Plutella xylostella Linne, in Aomori prefecture 3. Mortality of the second inster larvae under the snow 141

TSUTSUMI, M. and MITSUI, Y. : Seasonal prevalence of occurrence of onion and seed-corn flies, Hylemya antiqua and H. platura (Diptera : Anthomyiidae) using by the attractant mixture of 2-phenylethanol and n-valeric acid 143

TSUTSUMI, M. and MITSUI, Y. : Effects of baits on survival and development of ovary of onion fly (Hylemia antiqua) 146

KAZINO, Y. and HANADA, T. : Control of seed-corn maggot by mixing dichlofenthion with organic fertilizer 149

AKASAKA, Y., SUZUKI, T. and IIMURA, S. : Evasion response of over wintered adult of the larger potato lady beetle (Epilachna vigintioctomaculata) to the polyethylene film mulching 152

SAITO, T. and FUSE, H. : Comparison of the black cutworm moth catches between the synthetic sex pheromone and the black light trap in Shonai district 155

FUKUCHI, Y. : Notes on the swift moth, Endoclyta excrescens Butler, engraving radish plants 157

TSUTSUI, H., HONMA. K., GOTO, C. and HAYAKAWA, H. : The role of cocoons and cold hardiness in overwintering mature larvae of the crucifer caterpillar, Evergestis ficaicalis Linne 159

OHSAWA, S. and WATANABE, T. : Effects of insectisides on the cotton aphid, (Aphis gossypii), on cucumber in Fukushima prefecture 161

SAKAKI, J. : KOHYAMA, Y. and SASOH, Y. : Insecticidal activity of a chitin synthesis inhibitor teflubenzuron (Nomolt TM) 1. Insecticidal activity against different stages of the apple leaf miner, Phyllonorycter ringoniella 164

KOHYAMA, Y., SAKAI, J. and SASOH, Y. : Insecticidal activity of a chitin synthesis inhibitor teflubenzuron (Nomolt TM) 2. Insecticidal property against the apple leaf miner (Phyllonorycter ringoniella) 168

KAWASHIMA, K. : Influence of chemical treatments upon two apple aphids, Ovatus malicolens (Hori) and Aphis gossypii Glover 171

AMANO, K. : Laboratory tests to determine susceptibility of Musca hervei Vill, adults to permethrin 175

YAMASHITA, N., HASEGAWA, T. and YASUDA, S. : Biological control of the dung breeding fly, Musca herbei, by the activity of the dung beetle, Onthophagus gazella 177