brood period 中文意思是什麼
brood period
解釋
繁殖期-
In this paper two - generation reproduction toxicity of fenvalerate, a - cypermethrin, chlorpyrifos, and triazophos was tested in a 21d period with water flea, daphnia magna, . the toxicity indicator included longevity, body length, days to first brood, days to first pregnancy, number of youth per female, intrinsic rate of natural increase ( r ), and number of broods per female. accordingly, the dose - response relations and relations between the chronic responses and enzyme levels were investigated
為了確定水蚤體內生化指標與慢性毒害效應之間的關系，特別是在低濃度暴露狀態下生化指標改變的生物學意義，以便能更準確預測早期農藥對水蚤種群的潛在危害，本文以浙江省常用殺蟲劑氰戊菊酯、高效氯氰菊酯、三唑磷和毒死蜱進行了大型蚤（ d . magna ）的急性和慢性毒性試驗（包括子代水蚤的恢復試驗） 。 -
There are many different formulated s - methropene products in the market ; some only have little residual activity and are intended to target at and control a single brood of mosquitoes while others are slow - release formulations offering an extended period of control which lasts from 30 up to 150 days. it is important to note that the chemical must be present in the water when the larvae are in the late developmental stage for it to be effective
市面有多種不同配方的s -烯蟲酯產品，有些功效並不持久，只是用來防治當時已在該處的蚊子幼蟲，而有些則有特別配方，可不斷發揮功效，防治的時間長達30日，最長更可達150日。當幼蟲在生長期的後期時，這種化學物必須存在水中，才能發揮最佳防治功效，這點必須留意。
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