| Project/Area Number |
16K14865
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Plant protection science
|
|---|
| Research Institution | University of the Ryukyus |
|---|
Principal Investigator |
TSUJI Mizuki 琉球大学, 農学部, 教授 (20222135)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
中牟田 潔 千葉大学, 大学院園芸学研究科, 教授 (70343788)
北條 賢 関西学院大学, 理工学部, 准教授 (70722122)
|
|---|
| Research Collaborator |
HAYASHI Masayuki
|
|---|
| Project Period (FY) |
2016-04-01 – 2019-03-31
|
| Project Status |
Completed (Fiscal Year 2018)
|
| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
|
|---|
| Keywords | 総合的害虫管理 / 昆虫 / 生態学 / 行動学 / アリ / 動物行動学 / 化学生態学 |
|---|
| Outline of Final Research Achievements |
Ants can be beneficial agricultural agents as they are generalist predators. However, their tending of pest hemipterans is problematic. We examined if we can disrupt such mutualism. First, we analyzed nutrient contents of honeydew and their attraction to ants. Trisaccharides such as melezitose provided high nutrient values to ant as already known, but ant preference was not in parallel with their nutrient values when comparted among various sugars. In a series of experiments, we revealed that ants use methylalkanes of the mutualistic aphid's CHCs to recognize partners, and that ants learn them well. Furthermore, those information on the mutualists were shared by colony members through trophallaxis. Finally, we found that the frequency of ant tending on pink pineapple mealybug decreased when ants were provided with artificial honeydew (sucrose solution) as an alternative food source. However, mortality of mealybugs due to parasitism did not statistically significantly differ.
|
| Academic Significance and Societal Importance of the Research Achievements |
アリ類の半翅目昆虫随伴行動が環境依存的であることは過去の少数の研究から示唆されていた。随伴機構を深く研究することで、アリの害虫捕食者の機能を残したままが害虫であるアブラムシやカイガラムシへの随伴を妨害できないか模索した。まだ研究途上だが、共生システムの重要構成要素のいくつかが解明されたので、今後の研究で実用化が目指せるかもしれない。成功すれば減農薬と生物多様性温存型農業の発展に資するだろう。
|
