Bionomics of the leucaena seed beetle (Acanthoscelides macrophthalmus (Schaeffer, 1907))(Coleoptera: Bruchidae)
碩士 === 國立臺灣大學 === 昆蟲學研究所 === 96 === Leucaena leucocephala (Lam.) de Wit is a powerful invasive weed that can cause serious ecological problems such as degrading local vegetation diversity. A newly recorded seed beetle (Acanthoscelides macrophthalmus (Schaeffer, 1907)) was found attacking the seeds o...
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ndltd-TW-096NTU051850182015-11-25T04:04:36Z http://ndltd.ncl.edu.tw/handle/92774237867278766374 Bionomics of the leucaena seed beetle (Acanthoscelides macrophthalmus (Schaeffer, 1907))(Coleoptera: Bruchidae) 銀合歡豆象之生活史與野外生態 Li-Hsin Wu 吳立心 碩士 國立臺灣大學 昆蟲學研究所 96 Leucaena leucocephala (Lam.) de Wit is a powerful invasive weed that can cause serious ecological problems such as degrading local vegetation diversity. A newly recorded seed beetle (Acanthoscelides macrophthalmus (Schaeffer, 1907)) was found attacking the seeds of leucaena in Taiwan in 2004. For estimating the feasibility and efficiency of this leucaena seed beetle, A. macrophthalmus, as a biological control agent in Taiwan, we studied the morphology of its larvae, effect of temperature on developmental rate of each life stage and the influences of food supplements and mating on the longevity and fecundity of their adults. In addition, to reveal the risk of using leucaena seed beetle, utilization of pods in different shelters and other possible host plants surveys were conducted simultaneously in the field. Their generation time is 41.1 days at 27℃; egg and larva-pupa period were 6.6 and 34.5 days. The threshold of development was 14.1℃, while the parameter for egg period (4.1℃) was significantly lower; thermal constant was 526.3 degree days. Their developmental rate gradually increased with temperature, while maximum survival rate reached 66% at 23℃. Further morphological features and biological parameters for their life cycle were also described. In the field, leucaena seed beetle could complete their life cycle on pods that we manipulated on the ground and within canopy. Their population size fluctuated with the phenology of mature leucaena pods, though showing a time-lag effect for about a month. Leucaena seed beetle could feed on Albizzia falcataria, a new host genus in 11 legume species surveyed. Our study provides several developmental parameters of leucaena seed beetle which can help us to evaluate the feasibility for using them as a biological agent. Wen-Jer Wu 吳文哲 2008 學位論文 ; thesis 68 zh-TW |
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碩士 === 國立臺灣大學 === 昆蟲學研究所 === 96 === Leucaena leucocephala (Lam.) de Wit is a powerful invasive weed that can cause serious ecological problems such as degrading local vegetation diversity. A newly recorded seed beetle (Acanthoscelides macrophthalmus (Schaeffer, 1907)) was found attacking the seeds of leucaena in Taiwan in 2004. For estimating the feasibility and efficiency of this leucaena seed beetle, A. macrophthalmus, as a biological control agent in Taiwan, we studied the morphology of its larvae, effect of temperature on developmental rate of each life stage and the influences of food supplements and mating on the longevity and fecundity of their adults. In addition, to reveal the risk of using leucaena seed beetle, utilization of pods in different shelters and other possible host plants surveys were conducted simultaneously in the field. Their generation time is 41.1 days at 27℃; egg and larva-pupa period were 6.6 and 34.5 days. The threshold of development was 14.1℃, while the parameter for egg period (4.1℃) was significantly lower; thermal constant was 526.3 degree days. Their developmental rate gradually increased with temperature, while maximum survival rate reached 66% at 23℃. Further morphological features and biological parameters for their life cycle were also described. In the field, leucaena seed beetle could complete their life cycle on pods that we manipulated on the ground and within canopy. Their population size fluctuated with the phenology of mature leucaena pods, though showing a time-lag effect for about a month. Leucaena seed beetle could feed on Albizzia falcataria, a new host genus in 11 legume species surveyed. Our study provides several developmental parameters of leucaena seed beetle which can help us to evaluate the feasibility for using them as a biological agent.
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author2 |
Wen-Jer Wu |
author_facet |
Wen-Jer Wu Li-Hsin Wu 吳立心 |
author |
Li-Hsin Wu 吳立心 |
spellingShingle |
Li-Hsin Wu 吳立心 Bionomics of the leucaena seed beetle (Acanthoscelides macrophthalmus (Schaeffer, 1907))(Coleoptera: Bruchidae) |
author_sort |
Li-Hsin Wu |
title |
Bionomics of the leucaena seed beetle (Acanthoscelides macrophthalmus (Schaeffer, 1907))(Coleoptera: Bruchidae) |
title_short |
Bionomics of the leucaena seed beetle (Acanthoscelides macrophthalmus (Schaeffer, 1907))(Coleoptera: Bruchidae) |
title_full |
Bionomics of the leucaena seed beetle (Acanthoscelides macrophthalmus (Schaeffer, 1907))(Coleoptera: Bruchidae) |
title_fullStr |
Bionomics of the leucaena seed beetle (Acanthoscelides macrophthalmus (Schaeffer, 1907))(Coleoptera: Bruchidae) |
title_full_unstemmed |
Bionomics of the leucaena seed beetle (Acanthoscelides macrophthalmus (Schaeffer, 1907))(Coleoptera: Bruchidae) |
title_sort |
bionomics of the leucaena seed beetle (acanthoscelides macrophthalmus (schaeffer, 1907))(coleoptera: bruchidae) |
publishDate |
2008 |
url |
http://ndltd.ncl.edu.tw/handle/92774237867278766374 |
work_keys_str_mv |
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