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Jiro KOBAYASHI
1999 Volume 1999 Issue 50 Pages
6-11
Published: November 30, 1999
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Atsushi OHBA, Hideaki TSUJI, Masashi SASAHARA
1999 Volume 1999 Issue 50 Pages
12-15
Published: November 30, 1999
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Hideaki TSUJI, Masashi SASAHARA, Hiroei KANNO, Atsushi OHBA, Masao KAN ...
1999 Volume 1999 Issue 50 Pages
16-20
Published: November 30, 1999
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Tomio FUKAYA, Manabu HOSAKA, Reiko SHONAI
1999 Volume 1999 Issue 50 Pages
21-24
Published: November 30, 1999
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Jun OYAMA, Kenji SATO
1999 Volume 1999 Issue 50 Pages
25-27
Published: November 30, 1999
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Koichi OGASAWARA, Reiichi YOSHINO, Minoru SUGIYAMA, Toshio ENOYOSHI
1999 Volume 1999 Issue 50 Pages
28-31
Published: November 30, 1999
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Haruhiko SAKUMA
1999 Volume 1999 Issue 50 Pages
32-34
Published: November 30, 1999
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Nursery box application of carpropamid 4%GR (WIN
®) at 50-100g/ box firmly reduced secondary infection of
Pyricularia grisea in the greenhouse. Moreover, the nursery box application of the granule at 50g / box suppressed spore release from rice leaves in the paddy field as well as in the greenhouse. The results suggest that nursery box application of the carpropamid granule at 50g / box stably inhibit secondary infection of rice blast fungus in the paddy field.
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Akira SAYAMA, Tomio FUKAYA, Kaoru KYOYA, Fumio IIZUKA, Satoru OBARI
1999 Volume 1999 Issue 50 Pages
35-39
Published: November 30, 1999
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Kazuyo HAYASHI, Takashi KIDOKORO, Jun OYAMA
1999 Volume 1999 Issue 50 Pages
40-42
Published: November 30, 1999
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Kayo SHIRAI, Toru TAKEUCHI, Motoshige SHIMIZU, Harunobu TAKEUCHI, Yasu ...
1999 Volume 1999 Issue 50 Pages
43-46
Published: November 30, 1999
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Tamio TANAKA, Ken-ichi MINO
1999 Volume 1999 Issue 50 Pages
47-50
Published: November 30, 1999
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Kazuhiro INOUE, Yuko SATO, Mitsuyoshi SUZUKI, Kazunori SASAKI
1999 Volume 1999 Issue 50 Pages
51-53
Published: November 30, 1999
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Shigeo NAITO, Nobuo ITOH
1999 Volume 1999 Issue 50 Pages
54-57
Published: November 30, 1999
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Soybean root rot disease occurred in the field converted from a paddy field in Tohoku District, in the middle of June, 1996. Object of this study is to identify pathogens associated with root rot disease showing severe wilt symptoms at the growth stage V
3-V
4.
Rhizoctonia solani anastomosis group (AG) 1-1 B, AG 2-3, AG 5 and binucleate
Rhizoctonia sp. were isolated from the diseased roots. Among these AGs, AG 2-3 was highly pathogenic to soybean roots, and caused root rot with aerial wilt symptoms. This is the first record of soybean root rot caused by
R. solani AG 2-3 in Japan.
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Mamoru SATOU, Seizo HORIUCHI, Norihito YAMAUCHI
1999 Volume 1999 Issue 50 Pages
58-59
Published: November 30, 1999
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Mamoru SATOU, Seizo HORIUCHI, Norihito YAMAUCHI
1999 Volume 1999 Issue 50 Pages
60-61
Published: November 30, 1999
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Mamoru SATOU, Seizo HORILTCHI, Norihito YAMAUCHI
1999 Volume 1999 Issue 50 Pages
62-64
Published: November 30, 1999
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Masatoshi SATO, Tatsuji HATAYA, Kenichi KAWAKAMI, Yasushi KANO, Fumie ...
1999 Volume 1999 Issue 50 Pages
65-70
Published: November 30, 1999
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Potato leafroll virus (PLRV) was detected in a single green peach aphid (
Myzus persicae SuLz.) by PCR-microplate hybridization method. As little as 5 min feeding of aphids on PLRV-infected potato leaves gave the PLRV-positive reactions in 5.6% of aphids. The percentage of PLRV-positive aphids increased with longer acquisition-feeding period on infected leaves, and reached more than 80% after 8hr and 100% after 72hr feeding. PLRV could be detected from the groups consisted of a single viruliferous aphid and 29 non-viruliferous aphids. In addition, PLRV was detected not only from apterous (wingless) aphids but also from alate (winged) aphids. No significant difference in the detectable rate was observed in the both aphids between stored in 70% ethanol and kept in water for 3 days. PLRV was detected from aphids caught in yellow-pan water traps placed in potato fields where leafroll disease had not occurred. Therefore, this method is useful to detect viruliferous aphids for the control of leafroll disease in the fields.
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Tomohisa KURODA, Ikuko TAKEDA, Kazumi SUZUKI
1999 Volume 1999 Issue 50 Pages
71-73
Published: November 30, 1999
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Harukuni HORITA
1999 Volume 1999 Issue 50 Pages
74-77
Published: November 30, 1999
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Akio SUMINO, Tamio TANAKA, Ryu IYODA, Makoto TANAKA, Shozo IWAYA
1999 Volume 1999 Issue 50 Pages
78-81
Published: November 30, 1999
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Ryu IYODA, Makoto TANAKA, Shozo IWAYA, Akio SUMINO, Tsutomu HANADA
1999 Volume 1999 Issue 50 Pages
82-84
Published: November 30, 1999
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Fusaharu NAKATANI, Nobue HOSHI
1999 Volume 1999 Issue 50 Pages
85-88
Published: November 30, 1999
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Fusaharu NAKATANI, Nobue HOSHI
1999 Volume 1999 Issue 50 Pages
89-91
Published: November 30, 1999
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Masayoshi ASARI
1999 Volume 1999 Issue 50 Pages
92-96
Published: November 30, 1999
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Tadashi OGATA, Haruo KATSUMATA, Kazuchika TAKAIWA
1999 Volume 1999 Issue 50 Pages
97-99
Published: November 30, 1999
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Masako FUKAYA, Isao TAKAHASHI
1999 Volume 1999 Issue 50 Pages
100-103
Published: November 30, 1999
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Harukuni HORITA, Makoto KANO
1999 Volume 1999 Issue 50 Pages
104-107
Published: November 30, 1999
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In 1997, a bacterial disease indicated as leaf spot was found on sunflower in Hokkaido Prefecture. The symptoms were expressed by brown spots with water-soaked halo on the leaves. The bacterium isolated was pathogenic to sunflower by artificial inoculation, but not to 24 other plant species tested. The causal organism produced fluorescent pigment on King's B medium, and belongedto the group Ia from LOPAT reaction. The bacterium liquefied gelatin slowly, failed to hydrolyse arbutin and esculin, utilized erythritol, mannitol, sorbitol, gluconate and L-tartrate as a sole carbonsource. Thus, the bacterium was identified as
Pseudomonas syringae pv.
helianthi. The present reportis the first record of bacterial leaf spot disease of sunflower in Hokkaido Prefecture.
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Chieko TAKAHASHI, Hiroei KANNO, Ryoso HONKURA, Takao TSUKIBOSHI
1999 Volume 1999 Issue 50 Pages
108-111
Published: November 30, 1999
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Norihito YAMAUCHI, Mamoru SATOU, Seizo HORIUCHI
1999 Volume 1999 Issue 50 Pages
112-114
Published: November 30, 1999
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Hiroei KANNO, Hiroto OHKUBO
1999 Volume 1999 Issue 50 Pages
115-119
Published: November 30, 1999
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Undescribed diseases 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. have occurred in Miyagi Prefecture from 1997, 1996, 1997, 1997 and 1997, respectively. Pathogenicity of isolates from all the diseased plants to each host plant was demonstrated by the inoculation tests and the isolates were identified as
Sclerotinia sclerotiorum (Libert) de Bary on the basis of morphological and cultural characteristics. This is the first report on Sclerotinia rot of them in Japan.
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Hiroei KANNO, Seizo HORIUCHI
1999 Volume 1999 Issue 50 Pages
120-124
Published: November 30, 1999
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Undescribed diseases occurred on Perilla (
Perilla ocymoides L.), Nalta jute (
Corchorus olitorius L.) and Malabar nightshade (
Basella rubra L.) in Miyagi Prefecture in 1996 to 1998. Fungal isolates obtained from the diseased plants showed pathogenicity to the host plants by inoculation tests. All isolates were identified as
Verticillium dahliae Klebahn on the basis of morphological and cultural characteristics. This is the first report on Verticillium wilt of these plants in Japan.
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Akiyasu IITOMI
1999 Volume 1999 Issue 50 Pages
125-128
Published: November 30, 1999
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From 1997 to 1998, egg mortality factors of
Sogatella furcifera were evaluated in paddy fields in Akita Prefecture, North Japan. The percentage of egg mortality decreased from about 70% to 30% at 10 days before appearing of 50% of panicle-node. The physiological death occupied 70% to 90% of egg mortality and fluctuated depending on the forming of watery lesion which caused by plant reaction to oviposition sites in the leaf tissues. Other factors of prey, parasitism and inactivity after hatching occupied 10% to 30% of egg mortality and these might not be contributed to dynamics of the insect.
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Takashi KIDOKORO
1999 Volume 1999 Issue 50 Pages
129-132
Published: November 30, 1999
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Kiyoshi UENO, Osachi ABE, Hiroo HONDA, Junichi NAGAMINE, Takashi SAITO
1999 Volume 1999 Issue 50 Pages
133-137
Published: November 30, 1999
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Toshimitsu NAGANO, Yumiko UMETSU
1999 Volume 1999 Issue 50 Pages
138-140
Published: November 30, 1999
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Kiyomitsu ITO, Tadafumi NAKATA
1999 Volume 1999 Issue 50 Pages
141-144
Published: November 30, 1999
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Occurrence of odonate larvae was compared between direct-seeded and transplanted rice fields in Bibai, Hokkaido Pref. to examine the hypothesis that direct-seeding rice cultivation leads an abundant
Sympetrum population. Only two species,
Sympetrum infuscatum and
S. frequens, were observed and the former species was dominant (64.5 %). Although larval density and adult emergence were higher in direct-seeded field, the difference was not likely to be essential. In adition to that, the density of arthropods inhabiting in the aerial part of rice (=supposed to be prey of adult dragonflies) was not different between the two fields. Therefore, it was not confirmed the hypothesis in this survey.
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Yasuhiko KONNO
1999 Volume 1999 Issue 50 Pages
145-146
Published: November 30, 1999
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Takekatsu CHIBA, Reishi OHTOMO, Yoshiko KIKUCHI
1999 Volume 1999 Issue 50 Pages
147-148
Published: November 30, 1999
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Takekatsu CHIBA, Reishi OHTOMO, Yoshiko KIKUCHI
1999 Volume 1999 Issue 50 Pages
149-151
Published: November 30, 1999
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Akeo IWASAKI, Katsuhiro FURUKAWA
1999 Volume 1999 Issue 50 Pages
152-157
Published: November 30, 1999
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To simulate the infestation of Barley leaf-miner,
Agromyza albipennis Meigen, apical halves of upper 2 leaves of wheat were artificially defoliated for 3 years at two localities in Hokkaido. The result showed that the yield losses were 20% and 13% at maximum for spring-and winter-wheat respectively, when either one of upper 2 leaves was cut off. The economic injury levels based on yield loss and spray costwere estimated at 12% and 16% damaged leaves in upper 2 leaves of spring-and winter-wheat, respectively.
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Katsuhiro FURUKAWA, Akeo IWASAKI
1999 Volume 1999 Issue 50 Pages
158-164
Published: November 30, 1999
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Akeo IWASAKI
1999 Volume 1999 Issue 50 Pages
165-168
Published: November 30, 1999
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Egg-laying and mining habits in the first generation of beet leaf-miner,
Pegomya cunicularia (Rondani), were examined on sugar beet,
Beta vulgaris, in Hokkaido, Japan. Egg masses were composed of 1-11 eggs, with 4.0 as average, and mostly laid on lower 6 leaves, scarcely on upper 7th-10th. Leaf mines were also abundant on lower to middle leaves, and more than 90% mines were concentrated on the lower 7 leaves out of 12 at the end of infestation period of the generation.
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Toru MIZUKOSHI, Hiroshi TOGAWA
1999 Volume 1999 Issue 50 Pages
169-172
Published: November 30, 1999
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Developmental periods of
Chromatomyia horticola on garden pea were determined by laboratory experiments under three temperatures from 15 to 25°C. Although the developmental period showed a tendency to shorten as temperature elevated, the number of adult emergence at 25°C was decreased. The developmental zero and effective accumulative temperature in the stage from egg to adult emergence were calculated as 6.0°C and 270.2 day-degrees, respectively. On the basis of these data and daily averaged temperature,
C. horticola was estimated to undergo seven generations in a year in southern Hokkaido. In unheated vinylhouse, seven peaks was also observed on the seasonal occurrence of feeding punctures, eggs and mines on 50 top leaves of garden pea.
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Hiroshi TOGAWA, Toru MIZUKOSHI
1999 Volume 1999 Issue 50 Pages
173-175
Published: November 30, 1999
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Efficacy of the seven foliar spray insecticides against
Chromatomyia horticola on garden pea,
Pisum sativum, was evaluated in laboratory tests. Cartap and isoxathion showed high repellent effect on feeding and oviposition, followed by permethrin. In addition, cartap and isoxathion showed high hatching inhibitory effect. Flufenoxuron lacked these effect, but showed high inhibitory effect on larvae viability. These effect mentioned above of acephate, PAP, and diflubenzuron was all low.
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2. Control of the Allium Leafminer, Acrolepiopsis sapporensis (Matsumura) and theother pests on Allium in Northern area of Iwate Prefecture
Reishi OHTOMO, Takekatsu CHIBA, Masahiko ENDOU
1999 Volume 1999 Issue 50 Pages
176-178
Published: November 30, 1999
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Masashi KAKIZAKI, Hajime SUGIE, Kenji NAGATA, Takehiko FUKUMOTO
1999 Volume 1999 Issue 50 Pages
179-182
Published: November 30, 1999
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Some kinds of fiberboard formulation for mass trapping using synthetic sex pheromone, (
Z)-7, 15-hexadecadien-4-olide, of yellowish elongate chafer,
Heptophylla picea, were tested in a berry field. The fiberboard loaded with 0.5 g of DDVP and 10 mg of the synthetic sex pheromone, had the attraction activity and insecticide activity more than a month. And the fiberboard hung on some height was able to catch more males than that set on the ground.
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Masashi KAKIZAKI
1999 Volume 1999 Issue 50 Pages
183-185
Published: November 30, 1999
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It was observed significantly the co-relation between the total numbers of males captured by a sex pheromone trap and the densities of larvae in the yellowish elongate chafer,
Heptophylla picea, on the fields of the blueberried honeysuckle. The relationship between the numbers of males captured by trap (X) and the numbers of larvae per 10 stocks in the generation (X
1), was X=4.643× X
1+84.802 (r=0.75762), and that between the numbers of males captured by trap (X) and the numbers of larvae per 10 stocks in next generation (X
2), was X
2=0.291× X-20.688 (r=0.80461).
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Toru MIZUKOSHI
1999 Volume 1999 Issue 50 Pages
186-189
Published: November 30, 1999
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The attractiveness of synthetic pheromone for the black cutworm,
Agrotis ipsilon, had been monitored by sticky trap from 1992 to 1995 in southern Hokkaido.
A. ipsilon adults were captured during from May to early July and during from late July to early September. Although this moth was not captured in large numbers by light trap, the total catch by pheromone trap was 1.8 to 8.6 times more than that by light trap (high pressure mercury light, 100W). Pheromone trap was more efficient for population monitering than light trap. In 1995, the attractiveness of three dosages of synthetic pheromone (0.2, 1, 3 mg per rubber septam) was assessed in field. lmg dosage of synthetic pheromone per rubber septam was suitable for monitoring
A. ipsilon at low population densities. In theses tests,
Macdunnoughia confusa adults were caught by pheromone trap of
A. ipsilon. It was considered that
M. confusa might utilize the same sex pheromone components.
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Tadanori ISHITSUKA, Yoko WATANABE, Shuichi OHSAWA
1999 Volume 1999 Issue 50 Pages
190-192
Published: November 30, 1999
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Osamu KIKUCHI
1999 Volume 1999 Issue 50 Pages
193-195
Published: November 30, 1999
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