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Sea urchin-like calcium borate microspheres and synergistic action with cholinesterase-inhibiting insecticides for ecofriendly Spodoptera littoralis control
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2021-5-18 , DOI: 10.1039/d1em00125f Mohamed Khairy 1 , Haytham A Ayoub 2 , Farouk A Rashwan 1 , Hanan F Abdel-Hafez 3
Environmental Science: Processes & Impacts ( IF 4.3 ) Pub Date : 2021-5-18 , DOI: 10.1039/d1em00125f Mohamed Khairy 1 , Haytham A Ayoub 2 , Farouk A Rashwan 1 , Hanan F Abdel-Hafez 3
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The development of nanoagrochemicals has attracted much attention in the last decade to overcome the recent agricultural and environmental challenges associated with the intensive usage of insecticides. Herein, nanostructured calcium borate materials with hierarchical sea urchin-like microspheres and microblocks have been synthesized by a facile hydrothermal method. The insecticidal activity of CaB2O4 and its synergistic combination with cholinesterase-inhibiting insecticides are explored against Spodoptera littoralis (S. littoralis) for the first time via a feeding bioassay protocol. The insecticidal efficacy of sea urchin-like microspheres (CB-A) is estimated to be LC50 = 207 mg L−1 which is two-fold higher than that of microblocks (CBM-A) with LC50 = 406 mg L−1 after eleven days of exposure. The synergistic combination of the CB-A sample with methomyl and chlorpyrifos increases the toxicity to 2.4 and 2.6-fold higher than that of the individual insecticides, respectively. Significantly, sea urchin-like CaB2O4 microspheres cause physical damage to the external insect's cuticle layer, which consequently enhances the uptake of organic insecticides. Our results revealed that calcium borate micro-/nano-structures can be employed as a multifunctional nanoagrochemical in various agricultural programs for S. littoralis control and decrease the usage of cholinesterase-inhibiting insecticides.
中文翻译：
海胆状硼酸钙微球及其与胆碱酯酶抑制杀虫剂的协同作用对生态友好型滨海夜蛾的防治
在过去的十年中，纳米农用化学品的发展引起了很多关注，以克服最近与大量使用杀虫剂相关的农业和环境挑战。在此，通过简便的水热法合成了具有分级海胆状微球和微块的纳米结构硼酸钙材料。CaB 2 O 4的杀虫活性及其与抑制胆碱酯酶的杀虫剂的协同组合对滨海斜纹夜蛾（S. littoralis）的杀虫活性首次通过饲喂生物测定方案进行了探索。海胆样微球（CB-A）的杀虫功效估计为LC 50 = 207 mg L-1是暴露 11 天后LC 50 = 406 mg L -1的微块 (CBM-A) 的两倍。CB-A 样品与灭多威和毒死蜱的协同组合使毒性分别比单独的杀虫剂高 2.4 和 2.6 倍。值得注意的是，海胆状CaB 2 O 4微球会对外部昆虫的角质层造成物理损伤，从而增强有机杀虫剂的吸收。我们的研究结果表明，硼酸钙微/纳米结构可用作S. littoralis 的各种农业计划中的多功能纳米农用化学品 控制和减少抑制胆碱酯酶的杀虫剂的使用。
更新日期：2021-06-08
中文翻译：
海胆状硼酸钙微球及其与胆碱酯酶抑制杀虫剂的协同作用对生态友好型滨海夜蛾的防治
在过去的十年中，纳米农用化学品的发展引起了很多关注，以克服最近与大量使用杀虫剂相关的农业和环境挑战。在此，通过简便的水热法合成了具有分级海胆状微球和微块的纳米结构硼酸钙材料。CaB 2 O 4的杀虫活性及其与抑制胆碱酯酶的杀虫剂的协同组合对滨海斜纹夜蛾（S. littoralis）的杀虫活性首次通过饲喂生物测定方案进行了探索。海胆样微球（CB-A）的杀虫功效估计为LC 50 = 207 mg L-1是暴露 11 天后LC 50 = 406 mg L -1的微块 (CBM-A) 的两倍。CB-A 样品与灭多威和毒死蜱的协同组合使毒性分别比单独的杀虫剂高 2.4 和 2.6 倍。值得注意的是，海胆状CaB 2 O 4微球会对外部昆虫的角质层造成物理损伤，从而增强有机杀虫剂的吸收。我们的研究结果表明，硼酸钙微/纳米结构可用作S. littoralis 的各种农业计划中的多功能纳米农用化学品 控制和减少抑制胆碱酯酶的杀虫剂的使用。
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