LIFE-HISTORY AND FEEDING HABIT OF TYPHLODROMUS-BAMBUSAE, A SPECIFIC PREDATOR OF SCHIZOTETRANYCHUS-CELARIUS (ACARI, PHYTOSEIIDAE, TETRANYCHIDAE)

被引:23
作者
SAITO, Y
机构
[1] Laboratory of Applied Zoology, Faculty of Agriculture, Hokkaido University, Sapporo, 060, Kita-ku
关键词
D O I
10.1007/BF01193972
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Studies on the life history and food habit of Typhlodromus bambusae Ehara were carried out under aboratory conditions of 25±1°C, 60-80%rh and 15:9 l:d. The egg-to-egg period of the predator which fed on eggs of the long-seta form of Schizotetranychus celarius (Banks) was longer than those of the three phytoseiid species, Amblyseius eharai Amitai et Swirski, A. longispinosus (Evans) and A. paraki Ehara, which fed on Tetranychus urticae Koch. The sex-ratio of T. bambusae was not significantly different from those of the other three species. The long ovipositional period and the rather constant, low, reproductive rate observed in T. bambusae were remarkable. The intrinsic rate of natural increase (r m ) of T. bambusae was 0.164 per day and it was very similar to the r m of its prey, S. celarius. This observation supports the idea that there is a coincidence between the life-histories of spider-mite prey and their specific phytoseiid predators. Although females of T. bambusae could feed on eggs of Aponychus corpuzae Rimando or Schizotetranychus recki Ehara which cohabit with S. celarius on Sasa bamboo, their oviposition rate was lower than that on S. celarius eggs. Schizotetranychus celarius is thought to be a profitable prey species for T. bambusae, while S. recki and A. corpuzae are only subsidiary, or alternative, prey. © 1990 Elsevier Science Publishers B.V.
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页码:45 / 51
页数:7
相关论文
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