Web作业是教师在课堂教学之后用以巩固学生知识，培养学生能力的一种手段。作业贯穿学生学习活动的始终，是一种有目的、有指导、有组织的学习活动，是学生学习情况反馈的第一手书面材料，最能真实反映学生的学习过程。在大力倡导“自主、合作、探究式语文学习”的今天，我们如何让设计的 ... Cyhalothrin is the ISO common name for an organic compound that, in specific isomeric forms, is used as a pesticide. It is a pyrethroid, a class of synthetic insecticides that mimic the structure and properties of the naturally occurring insecticide pyrethrin which is present in the flowers of Chrysanthemum cinerariifolium. Pyrethroids such as cyhalothrin are often preferred as an activ…

Journal of Environmental Science and Health. Part B, Pesticides, …

WebApr 8, 2004 · Gamma-cyhalothrin is the isolated active isomer of lambda-cyhalothrin under 40 CFR 180.438. Pytech Chemicals GmbH, 9330 Zionsville Rd., Indianapolis, IN 46268, requested this change in tolerance expression in support of the registration of a pesticide formulation enriched with the gamma isomer of lambda-cyhalothrin. WebThe lambda-cyhalothrin content shall be declared (g/l at 20 ± 2°C, Note 2) and, when determined, the average content measured shall not differ from that declared by more than the following amounts: Declared content (g/l at 20 ± 2 C) Permitted tolerance up to 25 g/l hiking within one hour of montreal

cyhalothrin-翻译为中文-例句英语 Reverso Context

WebUnder laboratory conditions, both cyhalothrin and lambda-cyhalothrin were toxic for honey-bees; the oral LD 50 for lambda-cyhalothrin was 0.97µg/bee. However, in the field, the hazard is lower since current formulations have a repellent action that causes a suspension of foraging activity in the treated crop. WebFeb 15, 2024 · Lambda-cyhalothrin is a synthetic pyrethroid insecticide and acaricide.It is used to control pests like aphids and butterfly larvae. It is applied to crops such as cotton … WebLAMBDA-CYHALOTHRIN . A reaction product comprising equal quantities of (S)-α-cyano-3-phenoxybenzyl (Z)-(1R,3R)-3-(2-chloro-3,3,3-trifluoroprop-1-enyl)-2,2 … small wild cats in ohio