ANNUAL REPORT OF THE SOCIETY OF PLANT PROTECTION OF NORTH JAPAN

Online ISSN : 2185-4114
Print ISSN : 0368-623X
ISSN-L : 0368-623X

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Issue 52 Pages 1-

Volume 2001, Issue 52

Displaying 1-50 of 73 articles from this issue

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Biological Control of Fruit Tree Root Diseases with the Hypovirulence Factor

Naoyuki MATSUMOTO

2001 Volume 2001 Issue 52 Pages 1-3
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.1

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Effectiveness of Newly Released Systemic Fungicides Applied as Seed Disinfectants to Control Blast for Direct Sowing of Rice

Shinzo KOIZUMI, Kaoru ZENBAYASHI, Taketo ASHIZAWA

2001 Volume 2001 Issue 52 Pages 4-6
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.4

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The effectiveness of two newly released systemic fungicides (carpropamid and azxystrobin) applied as seed disinfectants to control blast was investigated for direct sowing of rice. Paddy field trials were conducted from 1998 to 2000. Seeds of rice cv. Doman-naka, whose level of partial resistance to blast is low, were treated with 40% wettable powder and 20% flowable carpropamid (4 g active ingredient, a.i./a), and 20% flowable azoxystrobin (6 g a.i.la). The seeds were then coated with 35 % calcium peroxide powder (an oxygen supplier) twice the seed weight. Blast severity was assessed after sowing the seeds in the paddies. The seed coating of carpropamid was more effective in reducing blast development than that of azoxystrobin. However, carpropamid was less effective than submerged applications of probenazole (24g a.i./a) and pyroquilon (20 a.i./a) granules.

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Occurrence of Leaf Blast in Early July in Paddy Field Rice Treated with Granular Fungicides at Nursery Boxes

Hiroshi NAKAMINAMI, Yuko MIKUMA, Ryoji KAWAMURA

2001 Volume 2001 Issue 52 Pages 7-10
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.7

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Occurrence and Cause of Rice Blast Disease of Seedlings in Akita Prefecture

Tomio FUKAYA, Manabu HOSAKA, Akiyasu IITOMI, Masakuni WAKAHATA, Seigo ...

2001 Volume 2001 Issue 52 Pages 11-13
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.11

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Pathogenic Races of Pyricularia grisea Isolated from the Rice Multiline, ‘Sasanishiki BL’, in Miyagi Prefecture from 1996 to 2000 and their Possible Inoculum Sources

Taketo ASHIZAWA, Kaoru ZENBAYASHI, Shinzo KOIZUMI

2001 Volume 2001 Issue 52 Pages 14-16
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.14

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Rice blast fungus, Pyricularia grisea, was isolated from blast lesions on paniclesof the rice multiline, 'Sasanishiki BL', in Miyagi Prefecture during 1996-2000. Sasanishiki BL consists of four isogenic lines, each of which possesses one resistance gene, Pik, Pik-m, Piz and Piz-t, respectively. Pathogenic races of the fungal isolates were identified as 003.0, 007.0 and 037.1. The former two races are incompatible with all the isogenic lines and are known to have existed in the prefecture for many years, whereas the latter 037.1 race is compatible with two of the isogenic lines, and has been rarely observed here until the introduction of Sasanishiki BL. Systematic samplings of fungal isolates from diseased Sasanishiki BL in certified seed production fields as well as from Sasanishiki BL produced from the seeds did not indicate that the compatible 037.1 race has been introduced via contamination of certified seeds.

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A Method of Cultivating Differential Rice Varieties Using Plant Growth Retardant for Identification of Blast Fungus Pathogenic Races

Atsushi OHBA, Masataka IWANO, Ryoichi SONODA, Atsushi MIYASAKA

2001 Volume 2001 Issue 52 Pages 17-20
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.17

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A Method for Artificial Inoculation of Rice Blast Fungus Using Clear Cover Materials in the Field

Takashi KOBAYASHI, Takashi NAKAJIMA, Takahiro HAMASAKI, Kiyoshi ISHIGU ...

2001 Volume 2001 Issue 52 Pages 21-23
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.21

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Seed Transmission of the False Smut of Rice

Hideaki TSUJI

2001 Volume 2001 Issue 52 Pages 24-26
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.24

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Pythium Species Isolated from Ungerminated Adzuki Bean Seeds

Takashi OKADA, Fujio KODAMA, Shohei FUJITA, Kippei MURATA, Norio KONDO ...

2001 Volume 2001 Issue 52 Pages 27-29
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.27

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Some Pythium species were isolated from ungerminated seeds of adzuki bean, which were seeded in moistened soil collected from the bean field, and then inoculated at 10°C for 10 days. The five isolates of Pythium spp. inhibited or retarded the growth of adzuki bean roots. This suggests that Pythium spp. are the causal agents of ungermination or damping-off of adzuki bean in Hokkaido.

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Effect of the Mixture of Kasugamycin and Copper Oxychloride on Bacterial Disease of Adzuki Bean Caused by Pseudomonas syringae pv. syringae van Hall

Toshiyuki HATAYA, Minako SAITO, Akio SUMINO, Hideo ABE, Sadao TSUCHIYA

2001 Volume 2001 Issue 52 Pages 30-33
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.30

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Cucumber mosaic virus in Potato and its Transmission through Tubers

Masatoshi SATO, Tadanori GOTO, Yohachiro HONDA

2001 Volume 2001 Issue 52 Pages 34-37
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.34

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A potato plant (Solanum tuberosum L.), showing yellow chlorosis, upward curling of leaf margins and stunting, was collected in Sapporo, Hokkaido, in 1990. Based on the host range, symptoms, serological relationships and particle morphology, the causal agent was identified as Cucumber mosaic virus (CMV). Potato plants inoculated with CMV showed systemic symptoms and produced CMV-infected tubers. The percentages of CMV transmission through tubers in cv. Irish Cobbler were 35.2%, cv. May Queen, 36.5% and cv. Kon-kei No.59, 19.4 %.

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Validation of Potato Late Blight Forecasts in Hokkaido

Masayasu KATO, Tadayuki SHIMANUKI

2001 Volume 2001 Issue 52 Pages 38-41
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.38

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Three forecast models for potato late blight, namely, BLITECAST, Simcast, and PhytoPRE, were examined for their validity in Sapporo, Hokkaido in 1999 and 2000. The diseased leaf areas of an unsprayed susceptible cultivar, Irish Cobbler, were less than 5% and 36.6%, in 1999 and 2000, respectively, at harvest. Four or eight applications of mancozeb resulted in a very low occurrence of potato late blight in both years. In the two years, Simcast for susceptible cultivars and BLITECAST recommended spraying between nine and twelve times during the season, indicating that both models recommended unnecessary sprays. Simcast for moderately resistant cultivars and PhytoPRE for resistant cultivars recommended four to five applications, comparable to the number of fungicide applications with which the disease was almost completely controlled.

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Anthracnose of Lettuce Caused by Microdochium panattonianum in Hokkaido

Harukuni HORITA, Shinji YASUOKA, Shizuka OZAWA, Motoki SATO

2001 Volume 2001 Issue 52 Pages 42-44
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.42

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In 1998 and 1999, a disease suggested to be anthracnose was detected in lettuce in Hokkaido. Diseased leaves developed brown sunken lesions on the veins and shot-hole lesions on the leaf blades. Isolates collected from the diseased leaves were pathogenic to various lettuce cultivars, but not to Cichorium spp. and other Asteraceae plants tested. Colonies on PDA exhibited slow growth and were pale pink without aerial mycelium. Conidia were fusiform, curved, 14.4×3.9μm in size, and produced in great abundance on PDA. Thus, the causal fungus was identified as Microdochium panattonianum. This is the first report of anthracnose disease of lettuce in Hokkaido.

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Control Effect of Dazomet Soil Fumigation on Verticillium Black Spot of Japanese Radish

(1) Treatment Dose and Depth

Akio SUMINO, Kuniaki KITABATAKE, Hiroyuki YANAGIYAMA, Tamio TANAKA, Ta ...

2001 Volume 2001 Issue 52 Pages 45-48
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.45

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Control Effect of Dazomet Soil Fumigation on Verticillium Black Spot of Japanese Radish

(2) Mulched Ridge Fumigation Using Three-ply Polyethylene Film

Akio SUMINO, Kuniaki KITABATAKE, Takayuki SASAKI, Hiroyuki YANAGIYAMA, ...

2001 Volume 2001 Issue 52 Pages 49-52
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.49

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Control Effect of Dazomet Soil Fumigation on Verticillium Black Spot of Japanese Radish

(3) Treatment Immediately before Snow Cover without Polyethylene Film

Tsutomu KOMATSU, Akio SUMINO, Kuniaki KITABATAKE, Hiroyuki YANAGIYAMA

2001 Volume 2001 Issue 52 Pages 53-55
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.53

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Control Effect of Dazomet Soil Fumigation on Verticillium Black Spot of Japanese Radish

(4) Combination of Mulched Ridge Fumigation and Resistance Cultivar Planting

Tsutomu KOMATSU, Akio SUMINO, Kuniaki KITABATAKE, Hiroyuki YANAGIYAMA

2001 Volume 2001 Issue 52 Pages 56-58
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.56

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A New Bacterial Rot Disease of Chinese Mustard Caused by Pseudomonas viridiflava

Akira SAYAMA, Hirosuke SHINOHARA, Naoya FUJII, Koushi NISHIYAMA

2001 Volume 2001 Issue 52 Pages 59-62
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.59

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A new bacterial rot disease was observed in Chinese mustard (Brassica campestris L., chinensis group) in Yuzawa, Akita Prefecture in 1998. Diseased plants exhibited leaf yellowing, crispation of leaf margin, browning and rot of petioles. The causal bacterium was identified as Pseudomonas viridiflava (Burkholder 1930) Dowson 1939 on the basis of bacteriological characteristics. This bacterium was pathogenic to Chinese mustard in the presence of freezing injury, suggesting that freezing injury promotes the occurrence of this disease. This is the first report for this bacterial rot of Chinese mustard.

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Occurrence of Bacterial Soft Rot of Zucchini (Cucurbita pepo L.) Caused by Erwinia carotovora subsp. carotovora

Naoya FUJII, Hirosuke SHINOHARA, Akira SAYAMA, Tomio FUKAYA, Koushi NI ...

2001 Volume 2001 Issue 52 Pages 63-66
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.63

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Mycelial Rot of Welsh Onion (Allium fistulosum L.) Caused by Botrytis byssoidea Walker

Hideo ABE, Akinori SHINMURA, Makoto IKEDA

2001 Volume 2001 Issue 52 Pages 67-71
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.67

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Inoculation of Fungi Causing Onion Basal Rot into Onion Seedlings

Nobuyuki ISHIZAKA, Kiyoshi TAKAHASHI, Kisaku YANAGITA

2001 Volume 2001 Issue 52 Pages 72-75
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.72

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Studies on the Occurence and Control of Watermelon Bacetrial Fruit Blotch

2. Effect of Antibiotics and Synthetic Organic Chemicals

Tomohiro KATOH, Kenji SATO

2001 Volume 2001 Issue 52 Pages 76-78
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.76

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Disease Development and Effects of Various Fungicides for the Control of White Smut of Cosmos Caused by Entyloma sp.

Harukuni HORITA

2001 Volume 2001 Issue 52 Pages 79-81
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.79

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White smut of cosmos caused by Entyloma sp. is one of the most severe plant diseases in Hokkaido. The disease reduces the commercial value of fresh cut flowers and seedlings. In late July, the first symptoms are observed as tiny whitish spots on the surface of the lower leaves. Between 7 and 12 days later, the number of whitish spots increases markedly. Efficient control of the disease can be achieved using the systemic ergosterol-biosynthesis-inhibiting (EBI) fungicides such as imibenconazole, cyproconazole and difenoconazole.

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A Survey of Chrysanthemum stunt viroid in Akita Prefecture

Hideki YAMAMOTO, Tadahiko KIGUCHI, Toshihide OHYA

2001 Volume 2001 Issue 52 Pages 82-84
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.82

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RT-PCR was conducted to detect Chrysanthemum stunt viroid, and the viroid was found in chrysanthemum plants exhibiting characteristic stunting symptoms in 1996 in Akita Prefecture, Japan. A survey of the viroid showed that it was widely distributed in chrysanthemum fields in the prefecture and that it was highly detected from spray-type chrysanthemums showing poor growth.

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Detection of Chrysanthemum virus B by RT-PCR

Hideki YAMAMOTO, Tadahiko KIGUCHI, Toshihide OHYA

2001 Volume 2001 Issue 52 Pages 85-86
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.85

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We established a RT-PCR assay to detect part of the gene for the coat protein of Chrysanthemum virus B. This assay revealed that approximately 20% of chrysanthemum plants used as a stock Were infected with the virus in Akita Prefecture, Japan.

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Occurrence of Necrosis Disease of Lisianthus, Eustoma russellianum (Don.) Griseb, Caused by Lisianthus necrosis virus in Hokkaido

Tomoo MISAWA, Takashi HAGITA

2001 Volume 2001 Issue 52 Pages 87-91
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.87

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A virus, which is spherical with a diameter of 35nm, was isolated from lisianthus, Eustoma russellianum (Don.) Griseb, exhibiting systemic necrosis in Hokkaido, Japan. The virus was transmitted by sap inoculation and infected 23 species in eight plant families. The thermal inactivation point of the virus was more than 90°C for 10min, its dilution end point was more than 10^-10, and its longevity in vitro was 71-79 days at 20°C. The virus positively reacted with antiserum against lisianthus necrosis virus. The molecular weight of the total protein of the virus was determined to be 37, 500-38, 500 daltons. These results indicate that the virus is Lisianthus necrosis virus.

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Control of Cucumber Mosaic Virus by Mulching with Aluminium Vacuum Metalizing Film in Lisianthus Field

Hiroshi ABE, Kimie WADACHI, Fusaharu NAKATANI

2001 Volume 2001 Issue 52 Pages 92-94
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.92

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Conditions Affecting the Outbreak of Penicillium Root Rot of Russell Prailie Gentian (Eustoma russellianum G. Don) Caused by Penicillium sp.

Kiichi TAIRAKO, Mitsuyo ONO

2001 Volume 2001 Issue 52 Pages 95-97
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.95

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Control of Penicillium Root Rot of Russell Prailie Gentian (Eustoma russellianum G. Don) Caused by Penicillium sp.

Kiichi TAIRAKO, Mitsuyo ONO

2001 Volume 2001 Issue 52 Pages 98-100
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.98

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Distribution of Fungicide-Resistant Botrytis cinerea in Hokkaido and Change in the Susceptibility under Plastic House Conditions

Megumi NAGAHAMA, Tomoo MISAWA, Sachiko IKEDA, Kazuko MAEDA, Yoko OKETA ...

2001 Volume 2001 Issue 52 Pages 101-104
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.101

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Occurrence of Crown Gall on Apple Rootstock ‘JM’ Strain

Syuuichi NEKODUKA, Takehiro KAWAMURA, Fusaharu NAKATANI, Hitoshi SASAK ...

2001 Volume 2001 Issue 52 Pages 105-108
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.105

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The Dispersal of Ascospore of Apple Blotch Fungus in Miyagi Prefecture

Masafumi KOBAYASHI, Masashi SASAHARA

2001 Volume 2001 Issue 52 Pages 109-112
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.109

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Curative Effects of Fenbuconazole and Simeconazole against Leaf Lesions of Apple Blossom Blight Caused by Monilinia mali

Tomoya AKAHIRA, Kinsuke YUKITA

2001 Volume 2001 Issue 52 Pages 113-116
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.113

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Chemical Control of Japanese Pear Core Rot Caused by Phomopsis sp.

Masako FUKAYA, Isao TAKAHASHI

2001 Volume 2001 Issue 52 Pages 117-119
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.117

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A New Control System for Brown Rot and Phomopsis Rot of Peach

1. Selection of Effective Disinfectants against Brown Rot and Phomopsis Rot of Peach

Eiji KANNO, Masatake SASAKI, Haruo KATSUMATA, Keizou ITO

2001 Volume 2001 Issue 52 Pages 120-122
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.120

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A New Control System for Brown Rot and Phomopsis Rot of Peach

2. Effectiveness of Reduced Disinfectant Application of the New Control System

Eiji KANNO, Masatake SASAKI, Haruo KATUMATA, Keizou ITO

2001 Volume 2001 Issue 52 Pages 123-125
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.123

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Adult Emergence Density of Two Sympetrum Dragonflies in Paddy Fields

Kazuhiko HACHIYA

2001 Volume 2001 Issue 52 Pages 126-128
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.126

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Width of Marginal Transplantation of Rice Seedlings Treated with Insecticide Necessary for the Control of the Rice Grasshopper, Oxya yezoensis Shiraki, and Reduction in the Rate of Pesticide Use

Takashi KIDOKORO, Tohru ONO

2001 Volume 2001 Issue 52 Pages 129-131
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.129

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Insecticide Susceptibility of the Rice Grasshopper, Oxya yezoensis Shiraki, in Aomori Prefecture

Masaki ISHIOKA, Toshiyuki KIMURA

2001 Volume 2001 Issue 52 Pages 132-134
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.132

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Investigation of Test Methods for a Sex Pheromone of the Rice Leaf Bug, Trigonotylus caelestialium (Kirkaldy) (Heteroptera: Miridae)

Masashi KAKIZAKI

2001 Volume 2001 Issue 52 Pages 135-137
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.135

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Some methods for testing an attraction activity of a sex pheromone of Trigonotylus caelestialium were investigated. Laboratory tests using a glass tube wind tunnel, net cage, and flask did not reveal an attraction activity for females or their body extracts. In field tests, synthetic compounds of sex pheromone, a mixture of hexyl caproate and (E)-2-hexenyl caproate, showed an attraction activity, although the body extracts by hexane did not show such an activity.

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Forecast of Pecky Rice Damage by Sweeping of Rice Leaf Bugs (Trigonotylus caelestialium (Kirkaldy)) (Heteroptera: Miridae)

Kazuhiro WATANABE, Tadashi KANAYA, Hiroo HONDA, Osachi ABE

2001 Volume 2001 Issue 52 Pages 138-142
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.138

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Effect of Weed Mowing on the Abundance of Trigonotylus caelestialium (Kirkaldy) (Heteroptera: Miridae)

Atsushi KIKUCHI, Tetsuya KOBAYASHI

2001 Volume 2001 Issue 52 Pages 143-145
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.143

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Occurrence of Pecky Rice Caused by Release of Rice Bugs

Yumiko UMETSU, Youichi MONMA, Toshimitsu NAGANO

2001 Volume 2001 Issue 52 Pages 146-148
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.146

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Outbreaks of Pecky Rice Bugs and Strategies for Conrtroling them in Yamagata Prefecture

1. Characteristics and Factors of Outbreaks of Pecky Rice Bugs

Hiroo HONDA, Shuichi ENDOH, Kazuhiho WATANABE, Osachi ABE, Junichi NAG ...

2001 Volume 2001 Issue 52 Pages 149-153
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.149

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Occurrence of an Abnormal Rice Kernel “Kokuten-Shoujoumai” in Akita Prefecture

Tokumitsu NIIYAMA, Tomohiro KUTSUZAWA, Masahiko SATO

2001 Volume 2001 Issue 52 Pages 154-158
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.154

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Change in Rice Damage by the Feeding Time of the White-Backed Rice Planthopper, Sogatella furcifera Horvath (Hemiptera, Delphacidae)

Akiyasu IITOMI, Tokumitsu NIIYAMA

2001 Volume 2001 Issue 52 Pages 159-162
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.159

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An investigation on the feeding time of Sogatella furcifera was carried out to clarify its relationship to rice damage using the variety Akitakomachi in Akita Prefecture in 2000. Transplanting date was on May 15 and the rice crop reached heading stage on July 31. The insect pest was introduced into the plots on July 5, July 15, July 25, August 5, and August 15 as treatments for a period of 35 days. There was no introduction of the insect pest in the control plot. In July 5 and July 15 treatment plots, culm length and the number of spikelets per panicle had lower values as compared to the control plot. However, reduction in yield was minimal. On the other hand, in July 25, August 5, and August 15 treatment plots, the percentage of ripened grains and the weight of 1000 kernels was low and yield loss was evident. This suggests that compensation reaction of rice growth is difficult in the late stage of the crop. Economic injury level should be studied in relation to the growth stage of the rice plant.

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Synoptic Relationship between the Occurrence of Planthopper, Sogatella furcifera, on Growing Rice and Unusually Cool Weather of Summer in the Tohoku District in Northeastern Japan

Tatsuo KOSHIHARA

2001 Volume 2001 Issue 52 Pages 163-167
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.163

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Suppression of Reproduction of the Foxglove Aphid (Aulacorthum solani) by High Temperature

A Thought on the Outbreak of the Foxglove Aphid in Tohoku District in 2000

Toshimichi OKUBO

2001 Volume 2001 Issue 52 Pages 168-171
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.168

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Outbreak of the Foxglove Aphid, Aulacorthum solani, in Soybean Fields

I. Survey of Occurrence in Miyagi Prefecture

Toshimitsu NAGANO, Yumiko UMETSU, Kazuhide ONODERA, Takashi KIDOKORO

2001 Volume 2001 Issue 52 Pages 172-174
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.172

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Outbreak of the Foxglove Aphid, Aulacorthum solani (Kaltenbach), in Soybean Fields of Miyagi Prefecture

II. Effect on Soybean Yield

Toshimitsu NAGANO, Yumiko UMETSU, Nobuyuki HOSHI, Takashi KIDOKORO

2001 Volume 2001 Issue 52 Pages 175-177
Published: November 30, 2001
Released on J-STAGE: August 11, 2011

DOIhttps://doi.org/10.11455/kitanihon1966.2001.175

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