K. Hamamura, M. Oshima, Naoki Nakamura, J. Okuno, T. Inagaki, J. Hashimoto
{"title":"Weeding efficacy, crop injury and dispersion uniformity of the suspension concentrate of imazosulfuron, oxaziclomefone, pyraclonil and bromobutide in some trials of water inlet application with shortened irrigation time in paddy rice cultivation","authors":"K. Hamamura, M. Oshima, Naoki Nakamura, J. Okuno, T. Inagaki, J. Hashimoto","doi":"10.3719/WEED.65.158","DOIUrl":"https://doi.org/10.3719/WEED.65.158","url":null,"abstract":"","PeriodicalId":17635,"journal":{"name":"Journal of Weed Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78406197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Current status of the Weed Science Society of Japan","authors":"A. Uchino","doi":"10.3719/weed.65.29","DOIUrl":"https://doi.org/10.3719/weed.65.29","url":null,"abstract":"","PeriodicalId":17635,"journal":{"name":"Journal of Weed Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76174822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Detection and spatial occupancy evaluation of kudzu community based on supervised classification of UAV imagery","authors":"H. Iwamoto, O. Watanabe","doi":"10.3719/weed.65.95","DOIUrl":"https://doi.org/10.3719/weed.65.95","url":null,"abstract":"","PeriodicalId":17635,"journal":{"name":"Journal of Weed Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90156508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Diagnosis of sulfonylurea-resistance by the rooting method using commercial paddy herbicides in Monochoria vaginalis (Burm. fil.) Presl var. plantaginea (Roxb.) Solms-Laub.","authors":"K. Hamamura, Hidetoshi Abe","doi":"10.3719/weed.65.1","DOIUrl":"https://doi.org/10.3719/weed.65.1","url":null,"abstract":"","PeriodicalId":17635,"journal":{"name":"Journal of Weed Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78856689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Summary Four populations of wild oats ( Avena fatua L.) collected from fields in western Ibaraki, Japan, were tested between 1999 and 2004 to determine the effect of seed burial depth on seedling emer gence. The persistence of seeds buried at a depth of 25 cm in the soil was also investigated. Plants were grown in the same field at NARO-ARC in Tsukuba, Ibaraki, Japan, and mature seeds were harvested. After 3 months in storage at room temperature, 100 seeds were buried in pots at 0, 5, 10, 15, and 20 cm depths with three replications for each depth. There were distinct differences in seedling emergence patterns between populations; most of the seeds in two populations emerged uniformly in the fall after the sowing year, whereas the third population emerged within a year. In the fourth population, there was a delay in the seedling emer gence pattern with the first flush occurring in early spring. The relationship between burial depth and emergence patterns differed between populations. In the three early-emerging populations, seeds buried at shallower depths emerged earlier, whereas in one late-emerging population, seeds buried at depths of 15 cm and 20 cm emerged earlier than those buried at 10 cm or less. For seeds buried at a depth of 25 cm, survival was associated with the emergence patterns. Most of the seeds in the early emergence population had germinated in the soil within 6 months, whereas more than 50% of the seeds in the late emergence population did not germinate. These results indicate that the emergence uniformity of wild oats is related to the depth of seed burial. Additionally, inter population variation in A. fatua germination requirements were found within a narrow regional scale in Japan.
{"title":"Differential response to seed burial depth on seedling emergence of four Avena fatua L. populations in western Ibaraki, Japan","authors":"M. Asai","doi":"10.3719/weed.65.103","DOIUrl":"https://doi.org/10.3719/weed.65.103","url":null,"abstract":"Summary Four populations of wild oats ( Avena fatua L.) collected from fields in western Ibaraki, Japan, were tested between 1999 and 2004 to determine the effect of seed burial depth on seedling emer gence. The persistence of seeds buried at a depth of 25 cm in the soil was also investigated. Plants were grown in the same field at NARO-ARC in Tsukuba, Ibaraki, Japan, and mature seeds were harvested. After 3 months in storage at room temperature, 100 seeds were buried in pots at 0, 5, 10, 15, and 20 cm depths with three replications for each depth. There were distinct differences in seedling emergence patterns between populations; most of the seeds in two populations emerged uniformly in the fall after the sowing year, whereas the third population emerged within a year. In the fourth population, there was a delay in the seedling emer gence pattern with the first flush occurring in early spring. The relationship between burial depth and emergence patterns differed between populations. In the three early-emerging populations, seeds buried at shallower depths emerged earlier, whereas in one late-emerging population, seeds buried at depths of 15 cm and 20 cm emerged earlier than those buried at 10 cm or less. For seeds buried at a depth of 25 cm, survival was associated with the emergence patterns. Most of the seeds in the early emergence population had germinated in the soil within 6 months, whereas more than 50% of the seeds in the late emergence population did not germinate. These results indicate that the emergence uniformity of wild oats is related to the depth of seed burial. Additionally, inter population variation in A. fatua germination requirements were found within a narrow regional scale in Japan.","PeriodicalId":17635,"journal":{"name":"Journal of Weed Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91149581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tsutomu Nozawa-Takeda, Meifang Yan, Y. Kodera, M. Aoyama, T. Nishio, M. Ogasawara
{"title":"A questionnaire survey to municipal governments in Tochigi Prefecture on weed and wildlife damages","authors":"Tsutomu Nozawa-Takeda, Meifang Yan, Y. Kodera, M. Aoyama, T. Nishio, M. Ogasawara","doi":"10.3719/WEED.65.129","DOIUrl":"https://doi.org/10.3719/WEED.65.129","url":null,"abstract":"","PeriodicalId":17635,"journal":{"name":"Journal of Weed Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74488479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yoshiki Kawano, C. Kakihara, Takeo Chikanori, M. Matsuo, A. Nishiwaki
To determine the distribution pattern of weeds in soybean field of Oita prefecture, field surveys were conducted from mid-August to September (the growing stage of soybean) and November (the maturing stage of soybean) in 2015 and 2016, respectively. The dominance of each weed in different fields was evaluated at six levels based on the observations made in the fields. Moreover, the percentage of occurrence of each weed was calculated from the data obtained. The weed species with high percentage of occurrence (occurring in more than 30% fields) were Echinochloa spp., Digitaria ciliaris (Retz.) Koeler, Amaranthus hybridus L., Physalis angulata L. var. angulata and Commelina caroliniana Walter. Among the invasive weeds with high percentage of occurrence, A. hybridus L. and P. angulata L. var. angulata occurred over the entire Oita Prefecture, but C. caroliniana Walter occurred mainly in the northern region. This is probably because C. caroliniana Walter invaded the soybean field later than did the other two species. The weeds with medium occurrence percentage in the fields were those found in the northern region; C. caroliniana Walter was more abundant than A. hybridus L. and P. angulata L. var. angulata . From these results, it can be said that C. caroliniana Walter might spread quickly after invading the soybean fields. In addition, four invasive Ipomoea spp. and Sicyos angulatus L. were confirmed to be present in the soybean field. This is first time that the presence of S. angulatus L. in the soybean fields of Kyushu region is being confirmed.
{"title":"Occurrence of weeds in soybean fields of Oita Prefecture","authors":"Yoshiki Kawano, C. Kakihara, Takeo Chikanori, M. Matsuo, A. Nishiwaki","doi":"10.3719/weed.65.31","DOIUrl":"https://doi.org/10.3719/weed.65.31","url":null,"abstract":"To determine the distribution pattern of weeds in soybean field of Oita prefecture, field surveys were conducted from mid-August to September (the growing stage of soybean) and November (the maturing stage of soybean) in 2015 and 2016, respectively. The dominance of each weed in different fields was evaluated at six levels based on the observations made in the fields. Moreover, the percentage of occurrence of each weed was calculated from the data obtained. The weed species with high percentage of occurrence (occurring in more than 30% fields) were Echinochloa spp., Digitaria ciliaris (Retz.) Koeler, Amaranthus hybridus L., Physalis angulata L. var. angulata and Commelina caroliniana Walter. Among the invasive weeds with high percentage of occurrence, A. hybridus L. and P. angulata L. var. angulata occurred over the entire Oita Prefecture, but C. caroliniana Walter occurred mainly in the northern region. This is probably because C. caroliniana Walter invaded the soybean field later than did the other two species. The weeds with medium occurrence percentage in the fields were those found in the northern region; C. caroliniana Walter was more abundant than A. hybridus L. and P. angulata L. var. angulata . From these results, it can be said that C. caroliniana Walter might spread quickly after invading the soybean fields. In addition, four invasive Ipomoea spp. and Sicyos angulatus L. were confirmed to be present in the soybean field. This is first time that the presence of S. angulatus L. in the soybean fields of Kyushu region is being confirmed.","PeriodicalId":17635,"journal":{"name":"Journal of Weed Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83769812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Intraspecific variation of catechins and caffeine sensitivity in Stellaria media growing in tea garden","authors":"H. Inagaki, Masashi Tsushi","doi":"10.3719/weed.65.5","DOIUrl":"https://doi.org/10.3719/weed.65.5","url":null,"abstract":"","PeriodicalId":17635,"journal":{"name":"Journal of Weed Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76253527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Modes of action of auxinic herbicides and allelochemicals to induce hormonal actions and/or overproduction of reactive oxygen species","authors":"Y. Sunohara","doi":"10.3719/weed.65.45","DOIUrl":"https://doi.org/10.3719/weed.65.45","url":null,"abstract":"","PeriodicalId":17635,"journal":{"name":"Journal of Weed Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91537394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of photoperiod on growth, flower bud appearance and seed production of four morningglory (Ipomoea) species","authors":"T. Shibuya, K. Nakatani","doi":"10.3719/weed.65.110","DOIUrl":"https://doi.org/10.3719/weed.65.110","url":null,"abstract":"","PeriodicalId":17635,"journal":{"name":"Journal of Weed Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79588460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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