排序方式: 共有52条查询结果,搜索用时 15 毫秒
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运用浸渍法和叶片残毒法测定了4种杀螨剂及其混剂对二斑叶螨抗性种群不同发育阶段的致毒作用。结果表明:阿维菌素对雌成螨的毒力最高,LC50为0.0864mg/L;其次为溴虫腈和阿维菌素+哒螨灵(1:15),LC50分别为9.5377mg/L和1.4412mg/L。对卵的毒力溴虫腈最高,LC50为0.1223mg/L;其次为阿维菌素和阿维菌素+哒螨灵(1:15),LC50分别为0.4425mg/L和0.6827mg/L。对二斑叶螨的室内控制效果依次为溴虫腈>阿维菌素+哒螨灵(1:15)>哒螨灵>阿维菌素>哒螨灵+甲氰菊酯(1:1)>甲氰菊酯。 相似文献
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几种药剂对玉米红蜘蛛的室内和大田药效 总被引:1,自引:0,他引:1
几种杀螨剂对玉米红蜘蛛窜内药效结果显示:对玉米红蜘蛛的主要种类--截形叶螨第7天的室内防效为28%哒螨灵乳油(78.3%)>240 g/L螨危FS(76.7%)>1.8%阿维菌素乳油(72.O%)>40%炔满特乳油(65.9%)>40%氧乐果乳油(63.3%)>2.5%溴氰菊酯乳油(58.3%).大田试验结果表明:30 d后以240 g/L螨危FS 150 mL/hm2的效果最佳,防效为76.8%;氧乐果由于在当地长期使用,效果已经很不理想,防治效果只有38.7%. 相似文献
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2009年登记或上市的农药品种 总被引:3,自引:3,他引:0
概述了2009年登记或上市的21个新农药品种,其中杀菌剂5个、杀虫(螨)剂7个、除草剂6个、生物杀虫剂和信息素3个. 相似文献
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本研究选用杀虫杀螨剂哒螨酮为芯材,以癸二酰氯、乙二醇聚合生成的聚酯为囊皮,制备哒螨酮微胶囊;工艺条件为聚合温度30-50℃,搅拌速率500r/min;实验证明单体总用量、搅拌速率、聚合温度影响微胶囊剂的外观及粒径。 相似文献
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De Oliveira PR Bechara GH Denardi SE Oliveira RJ Mathias MI 《Microscopy research and technique》2012,75(1):28-35
In the present study, mice livers were examined following exposure to different doses of fipronil (15, 25, and 50 mg/kg). Histological and histochemical techniques were used to determine the cytotoxic potential of this compound and to assess the damage it caused to livers. Mice were divided into four groups: control group and groups I, II, and III were exposed to 15, 25, and 50 mg/kg fipronil, respectively. Our findings revealed cytological, morphohistological, and histochemical alterations in liver cells of animals from groups I, II, and III compared to group control animals. These changes included Kupffer-cell proliferation, hepatocyte hypertrophy, accumulation and distribution of proteins, polysaccharides, lipids, and vacuoles in the cytoplasm of hepatocytes, and congestion of blood vessels. These phenotypes mainly characterize the following: (a) autophagic processes, (b) steatosis, and (c) cell death by necrosis, which demonstrate the damage caused by fipronil on nontarget organisms in artificial conditions. 相似文献
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