首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Lethal effects of high temperatures on nondiapausing pupae ofBathyplectes curculionis [Hym.: Ichneumonidae]
Authors:N N Hama  D W Davis
Institution:1. Department of Biology, Utah State University, 84322, Logan, Utah, U.S.A.
Abstract:Nondiapausing pupae ofBathyplectes curculionis (Thomson) were studied under laboratory conditions. The mortality caused by 8 temperatures between 25–48°C at 20% and 70% relative humidity was measured at 10 exposure times between 15 min-24 h. There was no significant mortality at 25°C. Between 30 and 40°C, mortality occurred from long exposures only, with lethal effects becoming greater at each increase in temperature. At 43°C mortality occurred from relatively short exposures, with 100% at 4 h. Exposure times for 50% mortality averaged 16.58 h at 38°C, 1.08 h at 43°C and 0.31 h at 48°C. A slightly higher mortality occurred at 20% relative humidity than at 70% at temperatures between 35 and 40°C. At temperatures above 43°C no effects of relative humidity were noted. Afternoon soil surface temperatures in recently cut alfalfa fields commonly exceeded 50°C during July in northern Utah.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号