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Yoshihiro OGAWA, Tatsuro MUTA
1996 Volume 42 Pages
1-4
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Sachiko MATSUMOTO, Toshinobu NAKAMURA
1996 Volume 42 Pages
5-8
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Kaoru HANADA, Hideyo GOTO, Masatoshi ONUKI
1996 Volume 42 Pages
9-12
Published: November 15, 1996
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Hisayoshi MIYAGAWA, Takashi INOUE
1996 Volume 42 Pages
13-16
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Saeki TAISHI, Naoshi OMATSU, Shoichi IZUMI
1996 Volume 42 Pages
17-21
Published: November 15, 1996
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Kouichi KOMAKI, Hirotsugu KIYOTA
1996 Volume 42 Pages
22-25
Published: November 15, 1996
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Wataru HASAMA, Michihiro SATO
1996 Volume 42 Pages
26-30
Published: November 15, 1996
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Keiichi KOGA, Takao ITOH, Hiroyuki IEKI, Nobuo OHKUBO
1996 Volume 42 Pages
31-36
Published: November 15, 1996
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Hiroshi SHIOTANI, Katsumi OZAKI
1996 Volume 42 Pages
37-40
Published: November 15, 1996
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In 1994, young fruit apex rot of the citrus cultivar 'Shiranui' was found in Kumamoto Prefecture. The causal agent was confirmed to be a fungus by inoculation test. Judging from the characteristics of the fungus, colonial color, conidia shape and size, appressoria shape and size and hyphal growth of 15-35°C, the pathogen was identified as Colletotrichum gloeosporioides. It was proved that the pathogen successfully infected to detached leaves of 'Shiranui' and its parents 'Kiyonmi' and 'Ponkan', but could not infect 'Kawano-natsudaidai'.
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Akira MORITA
1996 Volume 42 Pages
41-44
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Relationships among the incidence of bacterial blossom blight of kiwifruit, the amount of precipitation and the removal of deformed dormant buds were investigated. The amounts of precipitation during the leaf abscisson period and from sprout to bud period closely corre-lated with the incidence of disease. In addition, the precipitation during leaf abscisson period enhanced the infection of the pathogenic bacteria to dormant buds. The isolation frequency of the pathgenic bacterium (Pseudomonas syringae) from deformed dormant buds was higher than from normal dormant buds. The bacterial bloosom blight in full-blossom stage occurred severely in kiwifruit orchards where many deformed dormant buds were found dur-ing the abscisson period. The incidence of disease decreased with the removal of deformed dormant buds from fruit bearing shoot. It was suggested from these results that deformed dormant bud was one of the overwintering sources of the pathogen.
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Miho MORIYAMA, Hiroyuki SUGIURA, Hirotsugu KIYOTA, Kaoru HANADA
1996 Volume 42 Pages
45-47
Published: November 15, 1996
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Suzumi MORITA, Tokuhiro KIKUCHI
1996 Volume 42 Pages
48-54
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Takuhiro YAMAGUCHI, Hidemi KAMIWADA, Youko MIYANOHARA
1996 Volume 42 Pages
55-58
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Hidemi KAMIWADA, Takuhiro YAMAGUCHI
1996 Volume 42 Pages
59-61
Published: November 15, 1996
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Toshinobu NAKAMURA
1996 Volume 42 Pages
62-66
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Yoshito SEINO, Yoshito SUZUKI
1996 Volume 42 Pages
67-68
Published: November 15, 1996
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Susceptibility of S. furcifera eggs to saturated aqueous solution of benzyl benzoate (25.4ppm) was examined at 25°C with eggs 0 to 6 days after oviposition. Eggs im-mersed in the solution 0 or 1 day after oviposition suffered from 100% mortality within a day, while more than 96.7% of eggs immersed in the solution 2 to 6 days after ovi-position developed normally and survived until 7 days after oviposition. The results indicated that S. furcifera eggs are susceptible to benzyl benzoate for less than 2 days after oviposition, before the embryo develops to the symbiont ball formation stage.
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Yoshito SUZUKI, Koichi TANKA
1996 Volume 42 Pages
69-72
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Developmental speed and reproductive potential of the mirid bug, Cyrtorrhinus lividipennis, were measured nuder laboratory conditions. Both nymphs and adults were supplied with rice plants onto which gravid females of Nilaparvata lugens were released. Developmental zero and cumulative heat units required for completion of the immature stages were calculated at 11.7°C and 260 day-degrees, respectively, based on the immature period measured at 20, 24, and 28°C. Mean longevities (±SD) of male and female adults at 25°C were 30.1±5.9 and 28.2±5.7 days, respectively. Female adults started oviposition 3.1 days after emegence. Lifetime fecundity of females was 291.2±83.7 eggs, which was more than 10 times as large as the largest figure so far reported for C. lividipennis. It was suggested that the presence of N. lugens females in the rearing cage provided C. lividipennis with a much better food source than the ordinarv rearinv mothnd of prouidin N. lugens eggs laid in rice plants.
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1.Preventive action of insecticides on abnormal ratooning of summer planted sugarcane
Koji KAWASOE, Shoichi IZUMI
1996 Volume 42 Pages
73-74
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Takuya YAMASHITA, Osamu SETOKUCHI, Hidemi KAMIWADA, Kanetosi KUSIGEMAT ...
1996 Volume 42 Pages
75-78
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Seasonal changes in the number of chafer were investigated by counting adults caught by two different synthetic sex pheromone traps and a light trap in the southern Satsuma Peninsula of Kagoshima Prefeture in 1995. The dominant species of the chafers caught by these traps were Anomala albopilosa HOPE, Anomala cuprea HOPE and Anomala rufocuprea MOTSCHULSKY. The number of A. albopilosa and A. cuprea adults caught by pheromone traps increased from June, reaching peaks in mid-July and late-June, respectively, while that of A. rufocuprea adults increased from June, reaching a peak in early-August. All three dominant species of chafer tended to be caught by the pheromone trap more readily than by the light trap.
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Takashi SHIRAISHI, Shunji ANDO, Jun OKAMOTO
1996 Volume 42 Pages
79-82
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Hiroaki TORIGOE
1996 Volume 42 Pages
83-88
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Kiyotoshi YOKOMIZO, Tomotoshi KASHIO
1996 Volume 42 Pages
89-92
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Effect of the entomogenous nematode, Steinernema carpocapsae, on controlling the turnip moth larvae, Agrotis segetum, was examined on the pots and fields growing carrot plants. In the pot tests, ground spray of third stage juveniles (J3) of the nematode with the density of 5×10
5 and 10
6 in 1.5l of water per square meter caused the mortality of 66.7% and 80.0% respectively, in the A. segetum larvae, and injury of carrot plants was reduced to half or less of that in the unsprayed pots. In the field test, a similar effect was observed with one application of 10
6 J3/m
2 or two applications of 5×10
5 J3/m
2 with an 8-day interval, or application of 3g of 0.1 a.i. permethrin granule/m
2. These results demonstrate that S. carpocapsae is a useful agent for the biological control of A. segetum larvae in carrot fields.
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Hiroyuki TAKEMOTO, Kazuro OHNO, Tetsuya IKEDA, Keiko HAYASHI
1996 Volume 42 Pages
93-98
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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The western flower thrips (WFT), Frankliniella occidentalis, was first discovered in a southern area of Fukuoka Prefecture in April, 1994. Our census surveys revealed that the distribution of WFT has been limited to the southern part and a few restricted areas in Fukuoka Prefecture even one and a half years after its' initial discovery. In strawberry greenhouses, the number of WFT adults captured on blue sticky traps remained low during winter. However, the number increased rapidly in late March and early April. In a rose greenhouse, a similar tendency in the number of WFT was observed. Judging from the abundance pattern in greenhouses and the low temperature conditions outside the greenhouses, the WFT populations overwintering in greenhouses appeared to be a major source of the spring populations. From the control perspective, applications of insecticides immediately after planting and in early spring were thought to be crucial. The number of WFT adults captured in traps placed around a strawberry greenhouse and its surrounding vegetation showed that WFT adults dispersed from the greenhouse during late April and early May, and then colonized the surrounding vegetation. Thus, WFT appeared to utilize greenhouse crops and their surrounding vegetation successively as temporal habitats.
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1.Biological control of aphids using Chrysoperla carnea
Shuichi KUROGI, Masakazu NAKAMURA, Yasuo KAWASAKI
1996 Volume 42 Pages
99-102
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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2.Pathogenicity of some strains of entomopathogenic fungi to Thrips palmi and Myzus persicae
Shuichi KUROGI, Masakazu NAKAMURA, Yasuo KAWASAKI
1996 Volume 42 Pages
103-105
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Seishi TODA, Tomotoshi KASHIO, Masayoshi KOJIMA, Hirotsugu KIYOTA
1996 Volume 42 Pages
106-113
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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An attempt at integrated control of four major insect pests, the cotton aphid Aphis gossypii, the two-spotted spider mite Tetranychus urticae, the melon thrips Thrips palmi and the silverleaf whitefly Bemisia argentifolii, was conducted for greenhouse melon cultivated in the summer season, from May to July, utilizing four species of natural enemies, Chrysoperla carnea, Phytoseiulus persimilis, Orius sauteri and Encarsia formosa. The aphid population was effectively controlled at a low density when C. carnea was released 5 times at about 2 week intervals starting from 19 days after planting melon seedling with a ratio of one predator to 20 prey. The spider mite population was also controlled at a low density by releasing P. persimilis 2 times, on the 26th and 37th days after planting, with a ratio of one predator to 20 prey. No damage was caused by these two pests in he released plot, but in the non-released plot severe damage was observed. O. sauteri was released at a ratio of one to 20thrips on the 37th day after planting, but the effect was not evaluated because the thrips population in the non-released plot was also at a ow level during the experiment and no damage was caused. The whitefly population was controlled at a level of one fourth or less of the non-released plot and no economic damage was caused when E. formasa was released 4 times at about 2 week intervals from he 24th day after olantine. with a rate of 100 mammies per 40 plants.
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Tadashi FURUIE, Hirotsugu KIYOTA
1996 Volume 42 Pages
114-118
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Yoichi IDE, Minoru MURAOKA, Shogo OTSUKA
1996 Volume 42 Pages
119-121
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Fukunori NAKASONE, Yoshitugi HIGA, Masaaki NAGAMINE, Mieko KINJO
1996 Volume 42 Pages
122-124
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Mieko KINJO, Fukunori NAKASONE, Yoshitugi HIGA, Masaaki NAGAMINE, Shou ...
1996 Volume 42 Pages
125-127
Published: November 15, 1996
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Hiroshi SOEMORI, Masahiro TANIGUCHI, Shin IREI, Hukunori NAKASONE
1996 Volume 42 Pages
128-130
Published: November 15, 1996
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Nobuo OHKUBO
1996 Volume 42 Pages
131-132
Published: November 15, 1996
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Takeshi SHIMODA, Wataru ASHIHARA
1996 Volume 42 Pages
133-137
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Oligota kashmirica benefica NAOMI is one of the most important natural enemies of the citrus red spider mite Panonychus citri (MCGREGOR) in citrus orchards in Japan. To examine the migration of this predator between unsprayed Satsuma mandarin groves and Japanese cedar windbreaks nearby the orchards, we carried out a field investigation using a beating method for collecting the spider mites and their natural enemies in 1995. The population trend of P. citri in the groves showed a pattern with one peak in April. O. kashmirica benefca predominated among predatory insects including another staphylinid beetle O. yasumatsui KISTNER, and the population trend of the predator was closely synchronized with that of P. citri. Although the population trend of the cryptomeria spider mite Oligonychus hondoensis (EHARA) found in Japanese cedar windbreaks showed a pattern with two peaks in June and October, O. kashmirica benefica was observed only from October to December. These results suggest that O. kashmirica benefica individuals in the citrus orchards use windbreaks such as Japanese cedar infested by the spider mites for maintaining their population.
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Naoyuki SUGIURA, Masami TAKAGI
1996 Volume 42 Pages
138-140
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Within-tree distribution of the parasitism of Unaspis yanonensis by Aphytis yanonensis and Coccobius fulvus was investigated in six citrus orchards in Fukuoka in September 1995 to examine habitat partitioning by these two parasitoids. The percentage parasitism by A.yanonensis in the exterior part of the trees was higher than that in the interior part of the trees where it exceeded 20%, suggesting habitat preference of A. yanonensis for the exterior part of the trees. On the other hand, there was no significant difference in the percentage parasitism by Cs fulvus between the exterior and the interior parts of the trees in any of the orchards except in one orchard where the percentage parasitism by A. yanonensis in the exterior part of the trees was the highest of the six orchards, suggesting no habitat preference by C. fulvus. Thus, we found no evidence of habitat partitioning of the parasitoids because both of the species share their habitats in the exterior part of the trees. It was also suggested that the reduction of the percentage parasitism by C. fulvus in the exterior part of the trees in the orchard with the highest percentage parasitism by A. yanonensis resulted from interspecific competition with A. yanonensis.
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Tomoki ETOH, Asako NOUTOMI, Nobuya TASHIRO, Mikano INOSHITA
1996 Volume 42 Pages
141-145
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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Susceptibilities to seven acaricides in the citrus red mite, Panonychus citri MCGREGOR, collected from 21 citrus orchards in Saga Prefecture were determined by dipping the mite eggs in the chemical solutions. The mites collected from all orchards showed high susceptibility only to phenothiocarb. The mites from 17 orchards have low susceptibility to pyridaben which was an effective control agent of the mites from 1991 to 1992. The mite populations resistant against pyridaben have high susceptibility to phenothiocarb, suggesting no cross resistance against the two chemicals. The mites from most orchards showed low susceptibilities to other acaricides; this tendency was particularly noticeable in the mites from greenhouses of the Satsuma mandarin, Citrus unshiu. A field experiment revealed that phenothiocarb effectively reduced the mite population for 30 days in autumn. The difference in susceptibility to pyridaben among the mite populations suggest that the frequency of use of the chemical in an orchard has affected development of resistance in the mite population against the chemical.
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Yoshio MIYAHARA, Kazushige SOGAWA
1996 Volume 42 Pages
146-151
Published: November 15, 1996
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1996 Volume 42 Pages
152-156
Published: November 15, 1996
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1996 Volume 42 Pages
157-168
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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1996 Volume 42 Pages
169-174
Published: November 15, 1996
Released on J-STAGE: May 22, 2009
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