Mogi M
Department of Microbiology, Saga Medical School, Japan.
J Med Entomol. 1993 Mar;30(2):309-19. doi: 10.1093/jmedent/30.2.309.
Effect of intermittent irrigation to facilitate rice production on rice-field mosquitoes and larvivorous predators was studied in Saga, Japan. Mosquitoes and associated taxa were sampled by dipping in two rice fields subject to intermittent irrigation and in one rice field that remained flooded throughout the study period of approximately 1 mo. With the onset of intermittent irrigation, larval mosquito (Culex tritaeniorhynchus Giles and Anopheles sinensis Wiedemann) abundance decreased; reirrigated fields were colonized initially by first instars. Abundance of aquatic arthropod predators and larvivorous fish also decreased drastically. Water from irrigation canals was considered to be a major source of recolonization by these predators with limited breeding seasons and longer developmental periods than mosquitoes. Richness (number of taxa) of aquatic insect communities decreased, but the percentage mosquitoes among insects increased with repeated intermittent irrigation. Manipulation of rice fields and associated canals as a whole is essential to rice-field mosquito control by water management.
在日本佐贺，研究了间歇灌溉促进水稻生产对稻田蚊虫及食蚊性捕食者的影响。通过在两块采用间歇灌溉的稻田以及一块在约1个月的整个研究期间一直保持淹水的稻田中进行舀取采样，来获取蚊虫及相关类群。随着间歇灌溉的开始，幼虫蚊虫（三带喙库蚊Giles和中华按蚊Wiedemann）数量减少；重新灌溉的田块最初被一龄幼虫占据。水生节肢动物捕食者和食蚊性鱼类的数量也急剧减少。灌溉渠的水被认为是这些捕食者重新定殖的主要来源，因为它们的繁殖季节有限且发育期比蚊虫长。水生昆虫群落的丰富度（类群数量）下降，但随着间歇灌溉的反复进行，昆虫中蚊虫的比例增加。对稻田及相关水渠进行整体管控对于通过水管理控制稻田蚊虫至关重要。
