Benzpyrimoxan: An Insecticide for the Control of Rice Plant Hoppers

Authors: E. Satoh, R. Kasahara, T. Aoki, K. Fukatsu, D. Venkata Ramanarao, H. Harayama, T. Murata, A. Suwa

Abstract:

Rice plant hoppers (Hemiptera: Delphacidae) have been causing extensive economic damage in rice and are considered as serious threat in rice producing countries of Asia. They have developed resistance to major groups of chemical insecticide, and severe outbreaks occur commonly throughout Asia. To control these nuisance pests, Nihon Nohyaku Co., Ltd., recently discovered an insecticide, benzpyrimoxan (proposed ISO name), which is under development as NNI-1501 (development code). Benzpyrimoxan has a unique chemical structure which contains benzyloxy and cyclic acetal groups on pyrimidine moiety (5-(1,3-dioxan-2-yl)-4-[4- (trifluoromethyl)benzyloxy]pyrimidine). In order to clarify the biological properties of benzpyrimoxan, we conducted several experiments and found the following results. Benzpyrimoxan has high activity against nymphal stages of rice plant hoppers without any adulticidal activity. It provides excellent and long lasting control against rice plant hoppers, including populations that have developed resistance to several other chemical groups of insecticide. The study on its mode of action is undergoing. These features highlight the versatility of this insecticide as an effective and valuable tool from the viewpoints of insecticide resistance management and integrated pest management program. With the use of benzpyrimoxan, farmers shall be able to lead the best yield potential by keeping the population density of rice plant hoppers and associated virus diseases under control.

Keywords: Acetal, benzpyrimoxan, insecticide, NNI-1501, pyrimidine, rice plant hoppers.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1132463

References:

[1] J. L. A.Catindig, G. S. Arida, S. E. Baehaki, J. S. Bentur, L. Q. Cuong, M. Norowi, W. Rattanakam, W. Sriratanasak, J. Xia, and Z. Ju, “Situation of planthoppers in Asia,” in Planthoppers: new threats to the sustainability of intensive rice production systems in Asia, Heong KL, and Hardy B, Eds. Philippines: International Rice Research Institute, 2009, pp. 191-220.
[2] L. P. Gianessi, “Importance of pesticides for growing rice in South and Southeast Asia,” Crop Life International. https://croplife.org/case-study/importance- of-pesticides-for-growing-rice-in-south-and-south-east- asia/, 2014, accessed 2017-02-07.
[3] M. Matsumura, S. Sanada-Morimura, A. Otuka, R. Ohtsu, S. Sakumoto, H. Takeuchi, and M. Satoh, “Insecticide susceptibilities in populations of two rice planthoppers, Nilaparvata lugens and Sogatella furcifera, immigrating into Japan in the period 2005-2012,” Pest Management Science, pp. 615-622, 2014.
[4] X. L. Zhang, X. Liao, K. K. Mao, K. X. Zhang, and H. Wan, “Insecticide resistance monitoring and correlation analysis of insecticides in field populations of the brown planthopper Nilaparvata lugens in China 2012-14,” Pesticide Biochemistry and Physiology, pp. 13-20, 2016.
[5] Y. Ling, F. K. Huang, L. P. Long, Y. Zhong, W. B. Yin, S. S. Huang, and B. Q. Wu, “Studies on the pesticide resistant of Nilaparvata lugens in China and Vietnam,” Chinese Journal of Applied Entomology, pp. 1374-1380, 2011.
[6] Y. S. Basanth, V. T. Sannaveerappanavar, and D. K. Sidde Gowda, “Susceptibility of different populations of Nilaparvata lugens from major rice growing area of Karnataka, India to different groups of insecticides,” Rice Science, 20(5), pp. 371-378, 2013.
[7] Y. P. He, J. F. Zhang, P. F. Xiao, L. Z. Chen, and J. M. Chen, “Susceptibility of three rice planthoppers to insecticides in Zhejiang province,” Acta Agriculturae Zhejiangensis, 24(4), pp. 642-646, 2012.