title: Botanical insecticide research: many publications, limited useful data.
abstract: Our analysis of >20000 papers on botanical insecticides from 1980 to 2012, indicates major growth in the number of papers published annually (61 in 1980 to 1207 in 2012), and their proportion among all papers on insecticides (1.43% in 1980 to 21.38% in 2012). However, only one-third of 197 random articles among the 1086 papers on botanical insecticides published in 2011 included any chemical data or characterization; and only a quarter of them included positive controls. Therefore, a substantial portion of recently published studies has design flaws that limit reproducibility and comparisons with other and/or future studies. In our opinion, much of the scientific literature on this subject is of limited use in the progress toward commercialization or advancement of knowledge, given the resources expended.
authors: Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC V6T1Z4, Canada. Electronic address: murray.isman@ubc.ca.
authors: Murray B
authors: MB
authors: Isman
authors: AGIS Lab, Department of Land, Air and Water Resources, University of California, Davis, CA 95616, USA; Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
authors: Michael L
authors: ML
authors: Grieneisen
mesh_terms: D001688:Biological Products; D007306:Insecticides; D009822:Oils, Volatile; D012106:Research
chemical_list: D001688:Biological Products; D007306:Insecticides; D009822:Oils, Volatile
keywords: botanical insecticides; chemical composition; essential oils; natural products; positive controls