Translocation and translaminar bioavailability of two neonicotinoid insecticides after foliar application to cabbage and cotton
Translocation and translaminar bioavailability of two neonicotinoid insecticides after foliar application to cabbage and cotton
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DOI：
10.1002/ps.401
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发表时间：
2002-01-01
影响因子：
4.1
通讯作者：
Nauen, R
中科院分区：
文献类型：
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作者：
Buchholz, A;Nauen, R
对两种已商品化的新烟碱类（氯烟碱）杀虫剂的叶片系统特性和跨层杀虫活性进行了实验室研究。为此目的，在白菜和棉花叶面施用[C-14]吡虫啉后进行了吸收和转运研究。吡虫啉在两种植物的叶面渗透和短期转运模式相似。然而，吡虫啉对白菜叶的渗透是对棉花叶的两倍。它表现出类似的跨层行为，并完全在顶端移位，表明其众所周知的木质部移动性。以青桃蚜（Myzus persicae, Sulzer）和棉蚜（Aphis gossypii, Glover）分别作为白菜和棉花的典型同翅目害虫，采用简单的室内生物测定法，定量测定了吡虫啉和啶虫啉的跨层和顶点运动。在处理后1、5和12天，在白菜和棉花的上叶表面施用单剂量（每片7.5马克AI），对在施用地点附近和远处的下叶表面取食的蚜虫进行了试验。吡虫啉对白菜叶片的层间残留活性优于啶虫脒，而对棉花棉蚜的层间残留活性低于啶虫脒。然而，使用人工双膜喂养系统的口服摄入生物测定显示，两种新烟碱类杀虫剂的内在活性没有显着差异。(C) 2001年化学工业学会。
A laboratory study was undertaken to investigate the leaf systemic properties and the translaminar aphicidal activity of two commercialised neonicotinoid (chloronicotinyl) insecticides. For that purpose [C-14]imidacloprid was subjected to uptake and translocation studies in cabbage and cotton after foliar application. Foliar penetration and short-term translocation patterns of imidacloprid were similar in both plant species. Nevertheless imidacloprid penetrated twice as much into cabbage leaves as it did into cotton leaves. It showed a comparable translaminar behaviour and was entirely translocated acropetally, indicating its well-known xylem mobility. The translaminar and acropetal movement of imidacloprid and acetamiprid were quantified by simple laboratory bioassays using the green peach aphid, Myzus persicae (Sulzer), and the cotton aphid, Aphis gossypii (Glover), as typical homopteran pests for cabbage and cotton, respectively. A single dose (7.5 mug AI per leaf) applied to the upper leaf surface of cabbage and cotton was tested against aphids feeding on the lower leaf surface both close to and distant from the site of application 1, 5 and 12 days after treatment. The translaminar residual activity of imidacloprid on cabbage leaves was superior to that of acetamiprid, whereas its translaminar efficacy against A gossypii on cotton was inferior to that of acetamiprid. However, oral ingestion bioassays using an artificial double membrane feeding system revealed no significant differences in intrinsic activity between the two neonicotinoids tested. (C) 2001 Society of Chemical Industry.