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Yukihisa Imamura, Yohji Kawagoe, Kohko Kuno, Tomoe Jinkawa, Tohru Sugi ...
2007 Volume 53 Pages
1-8
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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A new disease was observed in balsam pears (Momordica charania L.) growing in open fields and greenhouses in Miyazaki Prefecture, Japan, in 2000. A Fusarium sp. that was highly pathogenic to balsam pears was isolated from the infected plants. Based on morphological tests using synthetic low nutrient agar (SNA) and potato dextrose agar (PDA) cultures, the isolate was identified as Fusarium oxysporum. Thus far, there are no detailed reports regarding this disease in Japan. Therefore, we propose a common name for this disease: Fusarium wilt of the balsam pear ("nigauri turuware-byo" in Japanese). The isolate was also highly pathogenic to bottle gourd and to cucumber, melon, watermelon, pumpkin, and the wax gourd. The pathogenicity of the balsam pear isolate obviously differed from that of other formae speciales of Fusarium oxysporum; it causes wilting of cucurbitaceous plants. The formae speciales of Fusarium oxysporum, including the isolate that causes wilting of cucurbitaceous plants, are suggested to be polyphylogenic based on rDNA intergenic spacer (IGS) sequence analysis.
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Mitsuru Okuda, Kenji Kubota, Masatoshi Onuki
2007 Volume 53 Pages
9-13
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Multiplex primers were calculated using a web-based program, muPlex in order to detect eight cucurbit-infecting viruses: Watermelon mosaic virus (WMV), Zucchini yellow mosaic virus (ZYMV), Cucumber mosaic virus (CMV), Kyuri green mottle mosaic virus (KGMMV), Papaya ringspot virus (PRSV), Melon yellow spot virus (MYSV), Cucumber green mottle mosaic virus (CGMMV), and Beet pseudo-yellows virus (BPYV). The predicted length of the amplified fragments ranged from 283 by to 1, 144 bp, and were distinct from each other. RT-PCR conducted using a mixture of all the primer pairs (primer cocktail) amplified the appropriate fragments corresponding to each virus species. Non-specific fragments were not observed. Two fragments were simultaneously amplified when RNA mixtures containing two distinct viral species were used as templates. However, if the concentration of one viral RNA was too high, the other virus could not be detected.
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Naoshi Omatsu, Ikuo Shinyashiki, Keisuke Uchikawa, Yoji Kawagoe
2007 Volume 53 Pages
14-17
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Shojiro Zen, Shin-ichi Fuji, Mitsuru Okuda
2007 Volume 53 Pages
18-23
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Yutaka Gyoutoku, Shinzaburo Sone, Koshi Gunjima, Kouichi Komaki
2007 Volume 53 Pages
24-28
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Takeshi Fukuda, Hideaki Inoue, Akitoshi Katsuda, Hidemi Kamiwada
2007 Volume 53 Pages
29-32
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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The insecticide susceptibility of the brown planthopper (BPH), Nilaparvata lugens that immigrated into Kagoshima Prefecture in 2005-2006 was investigated using the bell-jar dusting chamber method. BPMC, etofenprox, silafluofen, dinotefuran and buprofezin-fthalide-flutolanil demonstrated good efficacy against BPH. The susceptibility of BPH to insecticides was evaluated using the young rice root dipping method conducted in seedling boxes. The BPH populations that immigrated into Kagoshima Prefecture in 2005-2006 were compared with those that immigrated into Nagasaki Prefecture in 1999. Susceptibility to fipronil did not vary much between the 3 populations, while susceptibility to imidacroplid appeared to decline more apparently in the Kagoshima population than in the Nagasaki population.
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Motoharu Ono, Chie Yamamoto, Shinichi Yanagi, Takashi Wada
2007 Volume 53 Pages
33-38
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Kazumi Sugimura, Tamotsu Matsui, Kouji Nonaka, Itsumi Tamura
2007 Volume 53 Pages
39-44
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Takuhiro Yamaguchi, Katuhiko Miyaji, Tomohiko Wada, Tatuya Yuda, Tetuy ...
2007 Volume 53 Pages
45-49
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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The sweet potato weevil, Cylas formicarius (Fabricius), is a destructive insect pest of the sweet potato, Ipomoea batatas (L.) Lam. We investigated the geographical distribution and seasonal abundance of C. formicarius on Kikai Island using traps baited with synthetic sex pheromone (hereafter, pheromone trap). Male weevils were captured in most parts of Kikai Island using pheromone traps. In residential areas with a high density of houses, the numbers of males captured using pheromone traps were fewer than those of males captured in other areas. These results may be explained by the fact that residential areas offer a smaller area for the growth of the wild host plants. The seasonal abundance of the weevil population in Kikai Island was estimated based on the number of males captured using pheromone traps. The number of captured males increased from July or August and reached its peak in late September to October. Subsequently, it decreased rapidly and remained low from December until the next June. These results showed that the weevil population size on Kikai Island was small during winter, began to increase gradually in spring, and was the largest in September or October, reaching a peak population density in the period of 1 year.
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Noriaki Mougi, Tsuguo Kohama, Takashi Matsuyama, Shinji Kawano
2007 Volume 53 Pages
50-55
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Suguru Ohno, Tsuguo Kohama
2007 Volume 53 Pages
56-58
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Our recent study revealed that the majority of Euscepes postfasciatus eggs that sink into 14% saltwater were dead. We examined the effect of eliminating the eggs sinking into the saltwater before egg inoculation on the bacterial contamination of the artificial diet of the species. The mean rate of contamination when the sunken eggs were eliminated (51%) was significantly lower than that when sunken eggs were not eliminated (60%). The contamination rate of the diet was 2% when the eggs were not inoculated, which is much lower than that when the eggs were inoculated in the absence of sunken eggs. Although eliminating the sunken eggs alone could not sufficiently suppress the contamination, we considered that this method could be used as one of the useful techniques for integrated management of bacterial contamination in the artificial rearing of E. postfasciatus.
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Satoshi Higuchi, Misa Maeda, Yutaka Gyoutoku, Shigenori Ueda, Kouichi ...
2007 Volume 53 Pages
59-65
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Shin-ichiro Okazaki, Mitsuru Okuda, Tamito Sakurai
2007 Volume 53 Pages
66-70
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Yasuhiro Ogawa, Keisuke Uchikawa, Katsuhiro Inoue
2007 Volume 53 Pages
71-76
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Yukari Shigeta, Shin-ichiro Okazaki
2007 Volume 53 Pages
77-81
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Hisako Hirata, Yositaka Sakamaki, Katsuo Tsuda
2007 Volume 53 Pages
82-85
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Naoyuki Sugiura, Tamako Furukawa, Yoshimitsu Takizaki, Masatoshi Misum ...
2007 Volume 53 Pages
86-89
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Tomoya Kondou, Tatuya Nunokawa, Yoichi Ide, Nobuya Tashiro
2007 Volume 53 Pages
90-94
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Keiji Yasuda, Hitoshi Yoshitake, Tsuyoshi Ooishi, Atsushi Toudou, Nami ...
2007 Volume 53 Pages
95-98
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Shuji Hayashikawa, Hiroshi Suenaga, Kunihiko Matsuhira
2007 Volume 53 Pages
99-102
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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The Asian citrus psyllid, Diaphorina citri Kuwayama causes citrus greening disease. Investigation of psyllid invasion in citrus trees is crucial for the management of this disease occurrence. Toward the end of January 2006, young trees of Citrus tankan were placed in a fallow land in a residential area of Uken Village, Kagoshima Prefecture, Japan. The field was surrounded by orange jasmine hedges on 3 sides. The psyllid first invaded the tankan trees just after the orange jasmines shooted in mid-February. Thereafter, they continuously invaded the citrus trees; however, the number of invading adults did not increase proportionately with the number of new tankan shoots. The psyllids found on the tankan trees were mainly females; most of them had copulated and had matured eggs, suggesting that they can immediately reproduce after invading the citrus trees. These results suggest that the psyllids on orange jasmines are important targets for disease control and that orange jasmines should be removed from the vicinity to impede psyllid invasion into citrus groves.
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Takuhiro Yamaguchi
2007 Volume 53 Pages
103-106
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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The yellow tea thrips, Scirtothrips dorsalis Hood, and the red-banded thrips, Selenothrips rubrocinctus (Giard), cause serious damage to the epicarp of the fruits of mango (Mangifera indica L.). I investigated seasonal prevalence of both these thrips species on the flower buds, inflorescences, and fruits of mango plants cultivated in greenhouses on Amami-Oshima Island. Scirtothrips dorsalis was regularly found on flower buds, inflorescences, and young fruits. The number of thrips on fruits decreased with the growth of the fruits. In contrast, Selenothrips rubrocinctus was observed only on fruits, and not found on flower buds and inflorescences. With regard to Selenothrips rubrocinctus, the number of thrips on fruits increased proportionately with the growth of the fruits. Neither Scirtothrips dorsalis nor Selenothrips rubrocinctus were observed on ripe fruits.
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Nami Uechi, Tsuyoshi Ooishi, Keiji Yasuda, Kenzou Yamagishi, Masahiro ...
2007 Volume 53 Pages
107-110
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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Contarinia maculipennis Felt (Diptera: Cecidomyiidae) is an invasive pest from Southeast Asia, and it has a wide host range across 7 plant families. In Okinawa, this species infests flower buds of Dendrobium phalaenopsis, Dendrobium spp. (Orchidaceae), and Momordica charantia (Cucurbitaceae). During the rearing experiments of C. maculipennis larvae, we obtained 2 endoparasitoid species belonging to the genus Synopeas (Hymenoptera: Platygastridae). This platygastrid species that parasitized C. maculipennis larvae in Dendrobium flower buds differed from another species that parasitized C. maculipennis in Momordica flower buds. Although many platygastrids have been known to be parasitoids of various cecidomyiid species, this is the first record of platygastrids attacking C. maculipennis. There are 2 possibilities regarding the derivation of these parasitoids. One possibility is that they have been accidentally introduced to Okinawa together with Dendrobium and gall midge larvae. Another possibility is that these parasitoids are native species and have expanded their host range from unknown native insects to C. maculipennis.
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Tsuyoshi Ooishi, Nami Uechi, Atsushi Todo, Atsuko Funatomi, Keiji Yasu ...
2007 Volume 53 Pages
111-113
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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2007 Volume 53 Pages
114-115
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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2007 Volume 53 Pages
116-123
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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2007 Volume 53 Pages
124-131
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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2007 Volume 53 Pages
132-146
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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2007 Volume 53 Pages
147-148
Published: November 10, 2007
Released on J-STAGE: May 22, 2009
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