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.50 (1999)

KOBAYASHI, J. : Studies on Epidemic and Forecasting of Rice Leaf Blast in its Early Stage 6

OHBA, A., TSUJI, H. and SASAHARA, M. : Occurrence of field isolates of Pyricularia oryzae compatible with the near-isogenic lines of Sasanishiki rice in Miyagi Prefecture in 1998 12

TSUJI, H., SASAHARA, M., KANNO, H., OHBA, A. and KANAGAWA, M. : Change of Pathogenic Races of Rice Blast Fungus on Multiline Cultivars 'SasanishikiBL' in Recent Years 16

FUKAYA, T., HOSAKA, M. and SHONAI, R. : Evaluation of Several Methods Predicting Onset of General Epidemics of Rice Leaf Blast in Akita 21

OYAMA, J. and SATO, K. : Development of Rice Blast Disease in the Nursling Seedling Machine Transplanting Rice Culture 25

OGASAWARA, K., YOSHINO, R., SUGIYAMA, M. and ENOYOSHI, T. : Effect of Azoxystrobin on Sporulation of Pyricularia oryzae and Cochliobolus miyabeanus 28

SAKUMA, H. : Effect of Nursery Box Application of Carpropamid (WINR4GR) on Secondary Infection and Spore Liberation of Rice Blast Fungus 32

SAYAMA, A., FUKAYA, T., KYOYA, K., IIZUKA, F. and OBARI, S. : Excess Amount Ipconazol-copper Fungicide as a Rice Seed Disinfectant is a Possible Cause of Suppression of Germination and the Following Growth of Rice Seedlings 35

HAYASHI, K., KIDOKORO, T. and OYAMA, J. : Hot-water Treatment of Rice Seeds to Control Bakanae Disease 40

SHIRAI, K., TAKEUCHI, T., SHIMIZU, M., TAKEUCHI, H. and MIYAMORI, Y. : Relations between Sheath Brown Rot Disease and Yield of Rice and Concentration of Silicic Acid and Nitrogen in Rice on the Disease Development 43

TANAKA, T and MINO, K. : Evaluation of Resistance to Pythium Snow Rot in Wheat Cultivar 'Hokushin' 47

INOUE, K., SATO, Y., SUZUKI, M. and SASAKI, K. : Selection of Effective Chemical and its Application Timing for Control of Wheat Leaf Rust 51

NAITO, S. and ITOH, N. : Occurrence of Soybean Root Rot Disease Caused by Rhizoctonia solani AG 2-3 in Japan 54

SATOU, M., HORIUCHI, S. and YAMAUCHI, N. : Inoculum Density and Temperature Condition Required for Favorable Infection of Downy Mildew of Spinach 58

SATOU, M., HORIUCHI, S. and YAMAUCHI, N. : Evaluation of Resistance of Spinach Cultivars to Downy Mildew by Using Seedling 60

SATOU, M., HORIUCHI, S. and YAMAUCHI, N. : Downy Mildew of Ta-tsuai (Broad-leaved mustard ; Brassica campestris L. (narinosa group)) Caused by Peronospora parasitica (Persoon : Fries) Fries 62

SATO, M., HATAYA, T., KAWAKAMI, K., KANO, Y. and MORI, F. : Detection of Potato Leafroll Virus in Aphids by PCR-microplate Hybridization Method 65

KURODA, T., TAKEDA, I. and SUZUKI, K. : Detection of Tomato Spotted Wilt Virus (TSWV) Using the Reverse Transcription Polymerase Chain Reaction (RT-PCR) 71

HORITA, H. : A Method for Conidial Formation of Cladosporium allii-cepae Isolated from Onion and Welsh onion 74

SUMINO, A., TANAKA, T., IYODA, R., TANAKA, M. and IWAYA, S. : Occurrence of Small Sclerotial Rot of Welsh Onion in Hokkaido 78

IYODA, R., TANAKA, M., IWAYA, S., SUMINO, A. and HANADA, T. : A Survey of Small Sclerotial Rot of Welsh Onion in Date-city of Hokkaido 82

NAKATANI, F. and HOSHI, N. : Susceptibility of Apple Leaves to Apple Blotch Disease Caused by Diplocarpon mali Harada et Sawamura 85

NAKATANI, F. and HOSHI, N. : Effects of Temperature on Incidence of Apple Blotch Disease Caused by Diplocarpon mali Harada et Sawamura 89

ASARI, M. : Control of Apple Bitter Rot and Alternaria Leaf Spot in Northern Region of Akita Prefecture 92

OGATA, T., KATSUMATA, H. and TAKAIWA, K. : Brown Rot of Grape Berry Caused by Monilia fructigena 97

FUKAYA, M. and TAKAHASHI, I. : Effect and Optimum Application Time of Strobilurins for the Control of Grape Ripe Rot 100

HORlTA, H. and KANO, M. : Occurrence of Bacterial Leaf Spot on Sunflower in Hokkaido Prefecture 104

TAKAHASHI, C., KANNO, H., HONKURA, R. and TSUKIBOSHI, T. : Nectria Blight, a New Disease of Gerbera (Gerbera spp.) Caused by Nectria haematococca complex in Japan 108

YAMAUCHI, N., SATOU, M. and HORIUCHI, S. : Gray Mold of Scarlet Sage Caused by Botrytis cinerea Persoon : Fries 112

KANNO, H. and OHKUBO, H. : Sclerotinia rot of Malabar nightshade (Basella rubra L.), Lapsana apogonoides Maxim., Bishop's weed (Ammi majus L.) Blue lace flower (Didiscus caeruleus DC.) and Portulaca oleracea L. Caused by Sclerotinia sclerotiorum 115

KANNO, H. and HORIUCHI, S. : Verticillum Wilt of Perilla (Perilla ocymoides L.), Nalta jute (Corchorus olitorius L.) and Malabar nightshade (Basella rubra L.) Caused by Verticillium dahliae 120

IITOMI, A. : Egg Mortality Factors of the Whitebacked Planthopper, Sogatella furcifera Horváth (Homoptera : Delphasidae) in Akita Prefecture, North Japan 125

KIDOKORO, T : Submerged Application Timing of Synthetic Pyrethroid for the Rice Leaf Beetle, Oulema oryzae 129

UENO, K., ABE, O., HONDA, H., NAGAMINE, J. and SAITO, T. : Practical Use of the Synthetic Sex Pheromone for the Population Monitoring of the Rice Leafroller, Cnaphalocrocis medinalis GUENÉE 133

NAGANO ,T. and UMETSU, Y. : Occurrence of Rise bug, Leptocorisa chinensis (Dallas), in Miyagi Prefecture 138

ITO, K. and NAKATA, T. : Occurrence of Dragonflies in Direct-seeded and Transplanted Rice Fields 141

KONNO, Y. : Insecticide Susceptibility of the Rice Grasshopper, Oxya yezoensis (Orthoptera : Catantopidae) 145

CHIBA, T., OHTOMO, R. and KIKUCHI, Y. : Insect Pests on Millet in Iwate Prefecture 147

CHIBA, T., OHTOMO, R. and KIKUCHI, Y. : Biological Notes of Ostrinia furnacalis in Iwate Prefecture 149

IWASAKI, A. and FURUKAWA, K. : Economic Injury Level of Barley Leaf-Miner for Spring- and Winter-Wheat, Based on Artificial Defoliation 152

FURUKAWA, K. and IWASAKI, A. : An Analysis of Damage to sugar Beet Based on Leaf Cutting, Simulating the Injury of Beet Leaf Miner, Pegomya cunicularia (Rondani), in Hokkaido 158

IWASAKI, A. : Egg-laying and Mining Habits in the First Generation of Beet Leaf-Miner, Pegomya cunicularia (Rondani) on Sugar Beet 165

MIZUKOSHI, T. and TOGAWA, H. : Developmental Zero, Effective Accumulative Temperature, and Number of Annual Generations of the Garden Pea Leafminer, Chromatomyia horticola (Goureau) (Diptera : Agromyzidae) in the Oshima District of Hokkaido 169

TOGAWA, H. and MIZUKOSHI, T. : Effect of Seven Foliar Spray Inesecticides against the Garden Pea Leafminer, Chromatomyia horticola (Goureau) (Diptera : Agromyzidae), on Garden Pea, Pisum sativum L. 173

OHTOMO, R., CHIBA, T. and ENDOU, M. : Biological Notes and Control on Allium Leafminer, Acrolepiopsis sapporensis (Matsumura) 2. Control of Allium Leafminer, Acrolepiopsis sapporensis (Matsumura) and the other Pests on Allium in Northern area of Iwate Prefecture 176

KAKIZAKI, M., SUGIE, H., NAGATA, K. and FUKUMOTO, T. : Investigation on the Fiberboard Formulation for Mass Trapping Using the Synthetic Sex Pheromone for the Yellowish Elongate Chafer, Heptophylla picea Motschulsky (Coleoptera : Scarabaeidae) 179

KAKIZAKI, M. : Relation between the Numbers of Males Captured by a Sex Pheromone Trap and the Densities of Larvae in the Yellowish Elongate Chfer, Heptophylla picea Motschulsky (Coleoptera : Scarabaeidae), on the Fields of the Blueberried Honeysuckle 183

MIZUKOSHI, T. : Field Attractiveness of the Synthetic Sex Pheromone of the Black Cutworm, Agrotis ipsilon Hufnagel (Lepidoptera : Nocutuidae) and Seasonal Attractant Prevalence in the Oshima District of Hokkaido 186

ISHITSUKA, T., WATANABE, Y. and OHSAWA, S. : Parasitoids of the Diamondback Moth Plutella xylostella (L.) Collected from Brocoli Fields in Fukushima Prefecture 190

KIKUCHI, O. : Parasitism of Macrosiphoniella yomogicola (Matsumura) on Chrysanthemum 193

KIKUCHI, O. : Discovery of Sexual Generation of Macrosiphoniella yomogicola (Matsumura) 196

NIIYAMA, T. : Monitoring Method of Flower Thrips, Frankliniella intonsa (Trybom) on a Tomato Field 198

MASUDA, T. : Seasonal Occurrence of the Adult Cupreous Chafer, Anomala cuprea (Coleoptera : Scarabaeidae), by a Light Trap and the Number of Eggs per Female Captured by a Light Trap 203

ITO, K. and NAKATA, T. : Insecticide-induced Resurgence in Aphid Populations in the Potato Field 208

TAKAIWA, K., YANAI, M., HASEGAWA, Y., NAKAMURA, A., ARAKAWA, A. and OKAZAKI, K. : Susceptibility of Panonnychuys ulmi (Koch) to Acaricides in Fukusima Prefecture 212

KIMURA, Y. : Evaluation of Acaricides against the Two-spotted Spider Mite, Tetranychus urticae, Collected from Apple Orchards in Aomori Prefecture 216

FUNAYAMA, K. : Injury Caused by Flower Visiting Beetles on Apple Flowers 220

KOSHIHARA, T. : Historical Researches on Rice Insect Pests of the Ou District in the Edo Period of Japan(1) 223