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Yukiomi KOMOTO
1996 Volume 1996 Issue 43 Pages
1-8
Published: November 01, 1996
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Eizi YANO
1996 Volume 1996 Issue 43 Pages
9-14
Published: November 01, 1996
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Yuichi TANAKA
1996 Volume 1996 Issue 43 Pages
15-17
Published: November 01, 1996
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Naoki EGUCHI, Toru YAMASHITA
1996 Volume 1996 Issue 43 Pages
19-20
Published: November 01, 1996
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Naoki EGUCHI, Toru YAMASHITA
1996 Volume 1996 Issue 43 Pages
21-22
Published: November 01, 1996
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(1) Occurrence in Gunma Prefecture
Satoshi SHIBATA, Akihisa NARIZUKA
1996 Volume 1996 Issue 43 Pages
23-25
Published: November 01, 1996
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(2) Damage Analysis
Satoshi SHIBATA, Akihisa NARIZUKA
1996 Volume 1996 Issue 43 Pages
27-29
Published: November 01, 1996
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Shinichi YANAGI, Setsuo SHIMIZU
1996 Volume 1996 Issue 43 Pages
31-34
Published: November 01, 1996
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Fumihiro NEMOTO, Hideki NAITO, Kaoru ZENBAYASHI, Nagao HAYASHI
1996 Volume 1996 Issue 43 Pages
35-39
Published: November 01, 1996
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The spectrophotometer was used for the numerical evaluation of the relation between the tone of rice leaf color and the susceptibility to rice blast. It was able to evaluate precisely the numerical value of the seven tone grades of the rice leaf color scale by analyzing the brightness, coloration, tonality and reflection rate at 550nm wave length. It was also used for the evaluation of the relation between the tone of rice leaf color and the degree of susceptibility to rice blast after the nitrogen application as topdressing. It was able to detect the delicate change of leaf color just after nitrogen topdressing. Values of brightness, coloration and reflection rate at 550nm wave length reached the minimum 3 days after topdressing and the value of tonality reached the maximum. The susceptibility to rice blast began to increase just after nitrogen topdressing and reached the maximum 3 days later. These results suggested that using the spectrophotometer for detection of the change of leaf color afternitrogen topdressing was effective for the evaluation of the degree of susceptibility to rice blast.
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Yoshiyuki TAKAHASHI, Tadashi OGAWA, Shu ISHII, Toshiro KAWANO
1996 Volume 1996 Issue 43 Pages
41-43
Published: November 01, 1996
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Satoshi NODA
1996 Volume 1996 Issue 43 Pages
45-47
Published: November 01, 1996
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Chiharu TAKAHASHI, Satoshi NODA, Tsuneo UETAKE
1996 Volume 1996 Issue 43 Pages
49-51
Published: November 01, 1996
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Kouki OHTA
1996 Volume 1996 Issue 43 Pages
53-55
Published: November 01, 1996
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Hiroshi HAGIWARA, Takeshi SATO, Hatsuo SAITOH
1996 Volume 1996 Issue 43 Pages
57-58
Published: November 01, 1996
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Satoshi SHIBATA, Jun SHIMOYAMA, Hiroaki SAITO, Takeo HONDA
1996 Volume 1996 Issue 43 Pages
59-61
Published: November 01, 1996
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Mitsutaka MORI, Hiroshi HAGIWARA, Toshiaki TAKEHARA
1996 Volume 1996 Issue 43 Pages
63-66
Published: November 01, 1996
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Pythium rot of cabbage,
Brassica oleracea L., occurred in Tsukuba city, Ibaraki Prefecture in September, 1995. The stems just above the soil surface were affected and diseased tissues turned white in color, showing dry rot symptom. Both
Pythium aphanidermatum (Edson) Fitzpatrick and
Pythium sp. group ‘HS’ isolated from diseased plants were demonstrated as causal pathogens. This is the first report on stem rot of cabbage caused by
Pythium species.
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Jun TAKEUCHI, Hiromichi HORIE
1996 Volume 1996 Issue 43 Pages
67-70
Published: November 01, 1996
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Sclerotinia rot of
Brassica campestris L. (chinensis group),
Angelica keiskei Koidz., beard-tongue
Penstemon hybrids (
P. gloxinioides hort.), bladder campion
Silene vulgaris Garcke and verbena
Verbena officinalis L. occurred in Tokyo Metropolis between 1990 and 1995. The causal fungus isolated from the diseased plants was identified as
Sclerotinia sclerotiorum (Libert) de Bary by morphological observations and inoculation tests.
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(1) The Relationship between Disease Occurrence and Distance from Soil Surface to Fruit Apex
Masayuki TOGAWA
1996 Volume 1996 Issue 43 Pages
71-72
Published: November 01, 1996
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Takeharu KOIZUMI, Katsusuke MIYAHARA
1996 Volume 1996 Issue 43 Pages
73-74
Published: November 01, 1996
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Toshiro KAWANO, Hideki OGISO, Yoshiyuki TAKAHASHI
1996 Volume 1996 Issue 43 Pages
75-77
Published: November 01, 1996
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Kazuko UCHIYAMA
1996 Volume 1996 Issue 43 Pages
79-80
Published: November 01, 1996
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Toshihiko SHOJI
1996 Volume 1996 Issue 43 Pages
81-82
Published: November 01, 1996
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Yoshibumi OHNO, Kiichi NAKAYAMA, Syuichiro YAMAZAKI, Seiju ISHIKAWA
1996 Volume 1996 Issue 43 Pages
83-85
Published: November 01, 1996
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Yoshiro MIKOSHIBA, Yuki OHDAIRA, Ichiro FUJISAWA
1996 Volume 1996 Issue 43 Pages
87-89
Published: November 01, 1996
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Tsuneo CHIBA, Yasunori TOMITA, Yasuhiro MIYAZAKI
1996 Volume 1996 Issue 43 Pages
91-93
Published: November 01, 1996
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Seiju ISHIKAWA, Syuichiro YAMAZAKI, Yoshibumi OHNO
1996 Volume 1996 Issue 43 Pages
95-97
Published: November 01, 1996
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Strawberry Anthracnose (
Glomerella cingulata) causes severe loses in strawberry nurseries throughout Japan, despite the use of recommended fungicide. This study was carried out to evaluate the activity of two rice blast granule chemicals on the disease. In the nursery bed, probenazole at 9g a. i./m
2 and pyroquilon at 4g a. i./m
2 controlled the disease by row application. In raising seedlings in pots (9cm in diameter, 300
ml in capacity), only probenazole at 5g per pot adequately controlled the disease. Probenazole was the most active material against strawberry anthracnose in nursery bed and raising seedlings in pots.
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Takeharu KOIZUMI, Manabu YOKOTA, Toshimasa SHIRAISHI, Naoki IWATA
1996 Volume 1996 Issue 43 Pages
99-101
Published: November 01, 1996
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Yoko MIYAMA, Izumi FUKUHARA, Isao NAGAYAMA
1996 Volume 1996 Issue 43 Pages
103-105
Published: November 01, 1996
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Toshimasa SHIRAISHI, Hiroshi SAKAI
1996 Volume 1996 Issue 43 Pages
107-108
Published: November 01, 1996
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Mitsuaki ONO, Takahiro TEZUKA, Toyozo SATO, Yasuo TERAI, Taichi FUNAKU ...
1996 Volume 1996 Issue 43 Pages
109-112
Published: November 01, 1996
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Tokiya SHIMIZU, Hideki OGISO, Yasuhiko IWANAMI
1996 Volume 1996 Issue 43 Pages
113-116
Published: November 01, 1996
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Yoshibumi OHNO, Joji TSUNEMI, Seiju ISHIKAWA, Syuichiro YAMAZAKI
1996 Volume 1996 Issue 43 Pages
117-119
Published: November 01, 1996
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Toshihiko SHOJI
1996 Volume 1996 Issue 43 Pages
121-122
Published: November 01, 1996
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Gray mold of
Steirodiscus tagetes occurred in Saitama prefecture in 1995. A
Botrytis species isolated from diseased plants was identified as
B. cinerea. The inoculation experiment showed that the fungus was the causal agent of the disease.
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Toshihiko SHOJI
1996 Volume 1996 Issue 43 Pages
123-124
Published: November 01, 1996
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Southern blight of
Eupatorium fortunei occurred in Saitama prefecture in 1994. A
Sclerotium species isolated from diseased plants was identified as
S. rolfsii. The inoculation experiment showed that the fungus was the causal agent of the disease.
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Jun TAKEUCHI, Hiromichi HORIE
1996 Volume 1996 Issue 43 Pages
125-127
Published: November 01, 1996
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Verticillium wilt of balloonflower
Platycodon grandiflorum A. DC. and safflower
Carthamus tinctorius L. occurred in Tokyo Metropolis in 1995. The causal fungus isolated from the diseased plants was identified as
Verticillium dahliae Klebahn by morphological observations and inoculation tests.
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Jun TAKEUCHI, Hiromichi HORIE, Toshio KANAGAWA, Kazuo ARAMAKI
1996 Volume 1996 Issue 43 Pages
129-131
Published: November 01, 1996
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Southern blight of Cyrtanthus,
Cyrtanthus mackenii Hook. f., moss
phlox, Phlox subulata L., and beard-tongue,
Penstemon hybrids occurred in Tokyo Metropolis in 1995. The causal fungus isolated from diseased plants was identified as
Sclerotium rolfsii Saccardo by morphological observations and inoculation tests.
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Jun TAKEUCHI, Hiromichi HORIE, Kazuo ARAMAKI
1996 Volume 1996 Issue 43 Pages
133-135
Published: November 01, 1996
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Leafblight of copper alternanthera,
Alternanthera ficoidea (L.) R. Br. ex Roem. et Schult., lion'sear,
Leonotis leonurus (L.) R. Br., Egyptian star-cluster,
Pentas lanceolata (Forssk.) Deflers and stem and root rot of moss phlox,
Phlox subulata L. occurred in Tokyo Metropolis from 1994 to 1995. A
Rhizoctonia species isolated from the diseased plants was identified as
Rhizoctonia solani Kühn. Inoculation tests showed that the fungus was the causal agent of these diseases.
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Haruhiko KAGAWA
1996 Volume 1996 Issue 43 Pages
137-139
Published: November 01, 1996
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Syuichiro YAMAZAKI, Seiju ISHIKAWA, Yoshibumi OHNO
1996 Volume 1996 Issue 43 Pages
141-143
Published: November 01, 1996
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The simplified diagnostic method has been developed for latent infection of strawberry anthracnose. We applied this method to latent infection of cyclamen anthracnose. After dipping into 70% ethanol for 30 seconds, the leaves were incubated at 22°C, 25°C, 28°C, 31°C and 34°C. Pink masses of sporulation which were signs of anthracnose highly developed at 28°C after 20 days. This result supports that the method is useful for detection of latent infection of cyclamen anthracnose.
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Jun TAKEUCHI, Hiromichi HORIE
1996 Volume 1996 Issue 43 Pages
145-147
Published: November 01, 1996
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Yoshifumi ITO, Kohki OHTA
1996 Volume 1996 Issue 43 Pages
149-152
Published: November 01, 1996
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Toshiki SHIOMI, Minoru TANAKA
1996 Volume 1996 Issue 43 Pages
153-155
Published: November 01, 1996
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Akira UDAGAWA
1996 Volume 1996 Issue 43 Pages
157-162
Published: November 01, 1996
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Hiroaki TAKEUCHI, Kazuo HIRAI
1996 Volume 1996 Issue 43 Pages
163-165
Published: November 01, 1996
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Hiroaki TAKEUCH, Kazuo HIRAI
1996 Volume 1996 Issue 43 Pages
167-170
Published: November 01, 1996
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Kenji KOYAMA
1996 Volume 1996 Issue 43 Pages
171-172
Published: November 01, 1996
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Eiji YOSHIZAWA
1996 Volume 1996 Issue 43 Pages
173-174
Published: November 01, 1996
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Takatoshi UENO
1996 Volume 1996 Issue 43 Pages
175-178
Published: November 01, 1996
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Superparasitism and sex allocation in parasitized hosts in
Itoplectis naranyae and the effects of superparasitism on offspring survival and sex ratio at wasp emergence were studied. Female wasps accepted the majority of parasitized hosts for oviposition and did not change sex allocation in response to them. There is no significant difference in the percentage of wasp emergence between singly and plurally parasitized hosts. Superparatisitism did not influence sex ratio at wasp emergence.
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Takatoshi UENO
1996 Volume 1996 Issue 43 Pages
179-181
Published: November 01, 1996
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Larval competition in the solitary parasitoid wasp
Itoplectis naranyae was studied. When superparasitism occurred, competition took place between 24h and 48h after parasitism. Early instar larvae attacked competitive eggs and larvae and killed them, using the mandibles. The elimination of competitive eggs by larvae could be advantageous for larvae in superparasitism and partly explains why superparasitism has no effect on the fitness of surviving larvae.
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Kazuo HIRAI
1996 Volume 1996 Issue 43 Pages
183-184
Published: November 01, 1996
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A 12μm-thickness low density polyethylene ⌈PE⌋ film without fatty acid ester was good for manufacturing artificial eggs for rearing
Trichogramma sp. Ten μm-thickness high density PE, parafilm
® (American Can Co Ltd), Fuji Sealon film (Fuji photofilm Co. Ltd) and Urethane resin film were not suitable for processing artificial eggs. 20-30μm thickness PE was good for processing, but
Trichogramma wasps could not penetrate their ovipositors into them.
Trichogramma wasps laid their eggs into a 12μm-PE artificial egg. Their larvae and pupae grew inside filled with culture medium containing 2.5
ml of pupal fluids of
Mamestra brassicae, 1.5
ml of cow milk, 1.0
ml of egg yolk, and 0.5
ml solutions of mineral elements. The number of oviposited eggs was 55 among 58 tested ones. An average number of larvae grown inside an artificial eggs was 18.5, 5% of oviposited eggs could become adult with swollen abdomen and shrunk wings.
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