Cotrol of Trachys yanoi using environmental factors

2017 Fiscal Year Final Research Report

• Project/Area Number: 25450232
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Forest science
• Research Institution: Yamanashi Forest Research Institute
• Principal Investigator: Ohsawa Masashi 山梨県森林総合研究所, その他部局等, 研究管理幹 (80359249)
• Project Period (FY): 2013-04-01 – 2018-03-31
• Keywords: 早期落葉 / ヤノナミガタチビタマムシ / Leaf miner

Outline of Final Research Achievements

This study was conducted to elucidate the life cycle and control of Trachys yanoi, an important pest of Zelkova serrata. Life cycle, mortality rates in developmental stages, populatin dynamics were investigated. In July, leaves with the final stage of larvae were abscised. New adults emerged from abscised leaves after 9 to 14 days. Because only Zelkova leaves that were abscised in July contained the larvae, the removal of abscised leaves at nine-day intervals over period of early leaf abscission is a simple and effective way to control the beetle. The precipitation during the period when leaf-mining beetles inhabit early abscised leaves regulated the population dynamics of this beetle. This fact may enable us to estimate the damage caused by this beetle.

Free Research Field

森林昆虫