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Masatoshi MATSUO
1999 Volume 1999 Issue 46 Pages
1-6
Published: November 01, 1999
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Naoki EGUCHI, Tooru YAMASHITA, Reiichi AKANUMA, Hideki NAITO
1999 Volume 1999 Issue 46 Pages
7-8
Published: November 01, 1999
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Atsushi MIYASAKA, Ryoichi SONODA, Hideki NAITO
1999 Volume 1999 Issue 46 Pages
9-10
Published: November 01, 1999
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In hydroponically raised seedling method for long-mat type rice cultivation, influences of seed disinfectants on seedling growth were examined. Damage from the disinfectants appeared severely in the roots than in the upper part of rice seedlings, so the extension of roots was obstructed. On the other hand, the restraint of root extension in seedlings treated with pefurazoate or benomyl was lesser than in the seedlings treated with other disinfectants. These results suggest that pefurazoate and benomyl could be applied to hydroponically raised seedling method for long-mat type rice cultivation.
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Satoshi SHIBATA
1999 Volume 1999 Issue 46 Pages
11-13
Published: November 01, 1999
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Hiroshi ONO, Shingo YONEYAMA, Jayakody Arachchige, Sumanasiri JAYAKODY
1999 Volume 1999 Issue 46 Pages
15-17
Published: November 01, 1999
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The control effect of chemicals on the root-rot caused by
Pythium sp. in Cocoyam (
Xanthosoma sagittifolium) was investigated in Sri Lanka. The effect was observed in two treatments: one was the treatment of metalaxyl (ridomil) solution applied to inoculated soil, and the other was the treatment of dipping inoculated sucker to metalaxyl solution in the field, the effect of metalaxyl solution was also investigated. Thirty-seven days after the application of metalaxyl solution, increase of leaf number and plant height was observed and showed well plant growth, and the infectivity index decreased. Treatments of dipping suckers and application of metalaxylto the soil were effective in controlling this disease.
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Masashi FUJINAGA, Hideki OGISO, Takehiko KASHIYAMA, Junichi SHIRAISHI, ...
1999 Volume 1999 Issue 46 Pages
19-21
Published: November 01, 1999
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Masashi FUJINAGA, Yuji TAKEHANA, Hidehiro SEKIGUCHI, Takeo Wada, Yoshi ...
1999 Volume 1999 Issue 46 Pages
23-26
Published: November 01, 1999
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Itsuro KOBAYASHI, Isao KEMMOCHI, Kunio OTSUKA, Shoko ICHIKAWA, Minoru ...
1999 Volume 1999 Issue 46 Pages
27-29
Published: November 01, 1999
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Isao KEMMOCHI, Hiroshi SAKAI, Tosimasa SHIRAISHI
1999 Volume 1999 Issue 46 Pages
31-34
Published: November 01, 1999
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Kei SATO, Kazuo SUYAMA, Seiji UEMATSU, Taeko MATSUO, Hiromitsu NEGISHI ...
1999 Volume 1999 Issue 46 Pages
35-38
Published: November 01, 1999
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Hideki OGISO, Tokiya SHIMIZU
1999 Volume 1999 Issue 46 Pages
39-42
Published: November 01, 1999
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Noriko ORIHARA, Hidetoshi UEKUSA, Kazutaka KUSANO
1999 Volume 1999 Issue 46 Pages
43-45
Published: November 01, 1999
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Katsumi HIROMA, Yasuhiko IWANAMI
1999 Volume 1999 Issue 46 Pages
47-48
Published: November 01, 1999
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Yasunori TOMITA, Hideki OGISO
1999 Volume 1999 Issue 46 Pages
49-51
Published: November 01, 1999
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Jun TAKEUCHI, Hiromichi HORIE
1999 Volume 1999 Issue 46 Pages
53-55
Published: November 01, 1999
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Stem and root rots of perennial spiraea (
Astilbe×
arendsii) and
Otacanthus caeruleus occurred in Tokyo Metropolis in 1998. 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. This is the first report on these diseases in Japan.
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Jun TAKEUCHI, Hiromichi HORIE
1999 Volume 1999 Issue 46 Pages
57-59
Published: November 01, 1999
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Sclerotinia rot of aster (
Aster pilosus Willd.) and strawflower (
Helichrysum bracteatum Willd.) occurred in Tokyo Metropolis in 1998. The causal fungus isolated from the diseasd plants was identified as
Sclerotinia sclerotiorum (Libert) de Bary by morphological observations and inoculation tests. This is the first report on the disease in Japan.
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Toshihiko URUSHIBARA, Hiroshi SAKAI, Hiroshi HAGIWARA, Satoshi IZUTSU, ...
1999 Volume 1999 Issue 46 Pages
61-62
Published: November 01, 1999
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Toshihiko URUSHIBARA, Reiko SYONAI, Hiroshi HAGIWARA, Satoshi IZUTSU, ...
1999 Volume 1999 Issue 46 Pages
63-64
Published: November 01, 1999
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Toshihiko SHOJI, Hiroshi HAGIWARA, Satoshi IZUTSU
1999 Volume 1999 Issue 46 Pages
65-67
Published: November 01, 1999
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Root rot of New Guinea Impatiens occurred in Saitama Prefecture in 1998. A fungus isolated from the diseased plants was identified as
Pythium spinosum Sawada. The inoculation experiment showed that the fungus was the causal agent of the disease.
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Toshihiko SHOJI, Hiroshi HAGIWARA, Satoshi IZUTSU
1999 Volume 1999 Issue 46 Pages
69-72
Published: November 01, 1999
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Toshihiko SHOJI
1999 Volume 1999 Issue 46 Pages
73-75
Published: November 01, 1999
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Yoshiyuki TAKAHASHI, Kokichi TAKAHASHI, Kunio ODA, Toshiro KAWANO
1999 Volume 1999 Issue 46 Pages
77-79
Published: November 01, 1999
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Takatoshi UENO
1999 Volume 1999 Issue 46 Pages
81-83
Published: November 01, 1999
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Experiments were conducted to assess whether two strains of the pupal parasitoid wasp Itoplectis naranyae could differ in offspring production and sex ratio.
Galleria mellonella was used as a host.
Galleria mellonella was highly suitable for the develpment of parasitoid offspring, and the percentages parasitoid emergence did not differ between the two strains, regardless of host size. Females of Kobe strain produced more female offspring than Tsukuba strain did. Factors that caused this sex-ratio difference were discussed.
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Koichi TANAKA
1999 Volume 1999 Issue 46 Pages
85-88
Published: November 01, 1999
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Virulence of the brown planthopper
Nilaparvata lugens that immigrated into Japan in 1991, 1992, 1995 and 1996 was examined on four indica rice varieties, IR26 (carrying a resistance gene
Bph-1), Mudgo (
Bph-1), ASD7 (
bph-2) and Babawee (
bph-4) and on two
japonica rice lines, Saikai 190 (
Bph-1) and Norin PL10 (
Bph-3). The planthoppers were reared on a susceptible
japonica rice variety Reiho, and the newly-emerging brachypterous females were released on 5-to 7-week-old test rice plants at tillering stage. I defined the females whose abdomina became swollen within five days after releasing or those which have survived for five days as virulent individuals. The 1995- and 1996-populations of
N. lugens had higher proportions of virulent females on the
Bph-1-carrying rice varieties, 54-79% on IR26, 39-66% on Mudgo and 95% on Saikai 190, than the 1991- and 1992-populations. However, all the tested populations had still low proportions of virulent females on the rice varieties carrying
bph-2, Bph-3, or
bph-4, especially those carrying
Bph-3 or
bph-4. These results show that virulence to
Bph-1 in the
N. lugens populations immigrating into Japan has become stronger after 1988-1990 in which change of the virulence was first found, and suggest that the resistance of
Bph-1 has been broken down for this
N. lugens population.
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Masahiko OIKAWA, Hiroyuki NAGAOKA, Kazuhiro MORITA, Shoji ASANO
1999 Volume 1999 Issue 46 Pages
89-92
Published: November 01, 1999
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Takeshi MARUYAMA, Satoshi YANAGISAWA, Tomoko IWASA, Kazunobu SAKANAKA
1999 Volume 1999 Issue 46 Pages
93-95
Published: November 01, 1999
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Kazuhisa OHTSU, Masahiko KUWAHARA, Shozo ENDO
1999 Volume 1999 Issue 46 Pages
97-100
Published: November 01, 1999
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Kuniatsu KUWAZAWA
1999 Volume 1999 Issue 46 Pages
101-103
Published: November 01, 1999
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Takehiko KASHIYAMA, Masasi FUJINAGA, Yoshiro ARAI
1999 Volume 1999 Issue 46 Pages
105-107
Published: November 01, 1999
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Mitsuaki OTA, Akihito OZAWA, Hisatoshi KOBAYASHI
1999 Volume 1999 Issue 46 Pages
109-112
Published: November 01, 1999
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To evaluate the effects of
Beauveria bassiana preparations (Botani Gard
™) as control agents of whiteflies, two experiments were conducted on tomato. First, the tomatoes in a plastic house were sprayed with emulsifiable suspension formulation (ES) of the agent on May 19 and 26 and June 2 to control
Trialeurodes vaporariorum. The temperature and relative humidity in the plastic house were moderate (daily average temperature: 19.6-21.7°C) and higher (daily average humidity: 78.1-84.7%), and the most effective control of the whitefly was obtained. Secondly, other tomatoes in a vinyl house were sprayed with wettable powder formulation (WP) on October 14, 21 and 28 to control
Bemisia argentifolii that had been artificially introduced in the plants in advance. The whitefly was also effectively controlled in spite of the lower temperature and relative humidity. These results show that
B. bassiana preparations are useful for the management of whiteflies attacking tomatoes.
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Survival Period of Adults Reared on Distilled Water under Various Temperatures
Kenji KOYAMA, Masaharu MATSUI
1999 Volume 1999 Issue 46 Pages
113-114
Published: November 01, 1999
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Seiichi MORIYA
1999 Volume 1999 Issue 46 Pages
115-117
Published: November 01, 1999
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A laboratory strain was established on the ragweed beetle,
Ophraella communa LeSage, which has recently been introduced into Japan. The original population was collected in Tsukuba, Japan in September and October 1998. At 25°C of 16L-8D and 60% RH conditions, the durations of egg, hatching to adult emergence and preoviposition were about 6, 18 and 5 days, respectively, with the ragweed,
Ambrosia artemisiifolia L. grown in a greenhouse as a host plant.
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Akio TATARA
1999 Volume 1999 Issue 46 Pages
119-122
Published: November 01, 1999
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Yukio KOSUGI
1999 Volume 1999 Issue 46 Pages
123-126
Published: November 01, 1999
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Yukio KOSUGI
1999 Volume 1999 Issue 46 Pages
127-128
Published: November 01, 1999
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Yukio KOSUGI
1999 Volume 1999 Issue 46 Pages
129-131
Published: November 01, 1999
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Kinji USHIYAMA
1999 Volume 1999 Issue 46 Pages
133-136
Published: November 01, 1999
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Kinji USHIYAMA
1999 Volume 1999 Issue 46 Pages
137-140
Published: November 01, 1999
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Jun TAKEUCHI, Takayuki MIZUKUBO, Hiromichi HORIE, Fujio KAIHO, Koki EI ...
1999 Volume 1999 Issue 46 Pages
141-144
Published: November 01, 1999
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Leaf blight symptoms of
Bouvardia×
hibrida have broken out in two areas in Oshima Island, Tokyo Metropolis in 1998. The nematodes isolated from the diseased plants were identified as
Apherenchoides fragariae by morphological observation and morphometrics. To confirm the virulence of the nematodes, 200 individuals extracted from the field
Bouvardia were inoculated on the leaves of healthy
Bouvardia sp.,
Primula sp.,
Begonia sp.,
Gerbera sp. and
Eustoma sp. in pots with three replications. These tests were successful in reproducing the leaf blight symptom characteristic to the nematode and in establishing nematode colonies on all the plants tested. This is the first record on the leaf blight disease of
Bouvardia caused by
A. fragariae in Japan.
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Tosaku MIHIRA, Taeko TAKEUCHI, Hiroshi FUKUDA, Takashi KAWAKAMI, Futam ...
1999 Volume 1999 Issue 46 Pages
145-148
Published: November 01, 1999
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Tsuneo CHIBA, Yasunori TOMITA, Takashi ISHII, Masakazu FUJII
1999 Volume 1999 Issue 46 Pages
149-151
Published: November 01, 1999
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Hiromichi HORIE, Ken-ichi NUMAZAWA, Jun TAKEUCHI
1999 Volume 1999 Issue 46 Pages
153-157
Published: November 01, 1999
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Yasuhiro NAKAMURA, Kouichi AOKI, Shun-ichi HAGIYA
1999 Volume 1999 Issue 46 Pages
159-161
Published: November 01, 1999
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1999 Volume 1999 Issue 46 Pages
163-167
Published: November 01, 1999
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