- 著者
- Jiichiro Yoshimoto Takayoshi Nishida
- 出版者
- JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY
- 雑誌
- Applied Entomology and Zoology (ISSN:00036862)
- 巻号頁・発行日
- vol.42, no.3, pp.403-410, 2007 (Released:2007-09-20)
- 参考文献数
- 15
- 被引用文献数
- 12 13
Sap often exudes from the trunks of the oak, Quercus acutissima. Carpenterworms (Lepidoptera, Cossidae) are frequently observed at these sap sites and believed to be involved in exudation. Field observations from 2002 to 2004 showed that 20–40% of all patches (exuding spots on trees) harbored these insects and that roughly 20% of all patches had only their nests. The peak period of carpenterworm abundance corresponded to the peak number of patches harboring them in all 3 years (August 2002, September 2003, and July 2004). Patches with carpenterworms or their nests had a wider surface area and exuded more sap than patches without them or their nests. Moreover, their experimental removal resulted in decreased exudate quantity, indicating that these insects promote exudation. These results suggest that carpenterworms contribute greatly to sap exudation through wood boring and that their distribution and abundance affect sap resources.
- 著者
- 鶴井 香織 西田 隆義 Kaori Tsurui Takayoshi Nishida
- 雑誌
- 大阪市立自然史博物館研究報告 = Bulletin of the Osaka Museum of Natural History (ISSN:00786675)
- 巻号頁・発行日
- vol.64, 2010-03-31
- 著者
- Haruki Takayanagi Takayoshi Nishida
- 出版者
- 生態工学会
- 雑誌
- Eco-Engineering (ISSN:13470485)
- 巻号頁・発行日
- vol.29, no.2, pp.53-56, 2017-04-30 (Released:2017-04-30)
- 参考文献数
- 9
In recent years, an increasing emphasis on conserving biodiversity in cultivated land has led to a need for environmentally friendly and sustainable agriculture that does not depend on the excessive use of agrochemicals. However, it can be difficult to generate high crop yields without using herbicides because alternative methods of restricting weed growth are often costly and labor-intensive. Here, we designed a mesocosm to examine the weeding efficacy of a cheap, commercially available, automatic robot ball, which was originally designed for house cleaning. The weeding robot performed very well, particularly for sprouts of Monochoria vaginalis var. plantaginea, a major paddy weed found in central Japan.