Insecticide resistance and control failure likelihood of the whitefly Bemisia tabaci (MEAM1; B biotype): a Neotropical scenario. (8th December 2017)

• Record Type: Journal Article
• Authors: Dângelo, R.A.C.; Michereff‐Filho, M.; Campos, M.R.; da Silva, P.S.; Guedes, R.N.C.
• Is Part Of: Annals of applied biology. Volume 172:Number 1(2018)
• Page Start: 88
• Page End: 99
• Publication Date: 2017-12-08
• Subjects: Azadirachtin resistance -- bioinsecticide -- control failure survey -- inadvertent resistance selection -- whiteflies; Crop science -- Periodicals; Plants, Protection of -- Periodicals; Crops -- Ecology -- Periodicals; 630
• DOI: 10.1111/aab.12404
• Languages: English
• ISSNs: 0003-4746

Abstract

Abstract : Although insecticide resistance is an important pest management concern in pest species potentially leading to their control failure, the simultaneous assessment of both resistance and control failure is rare. Thus, the level of insecticide resistance and associated risk of control failure was assessed in Neotropical field‐populations of the putative whitefly species Middle East‐Asia Minor I (MEAM1) ( Bemisia tabaci B‐biotype). Resistance was detected for all of the seven insecticides tested, namely azadirachtin, cartap, chlorantraniliprole, diafenthiuron, imidacloprid, lambda‐cyhalothrin and spiromesifen. Risk of control failure was particularly high for the bioinsecticide azadirachtin, followed by spiromesifen and lambda‐cyhalothrin. Abstract: Insecticide resistance is a standing concern for arthropod pest species, which may result in insecticide control failure. Nonetheless, while insecticide resistance has remained a focus of attention for decades, the incurring risk of insecticide control failure has been neglected. The recognition of both problems is paramount for arthropod pest management and particularly so when invasive species notoriously difficult to control and exhibiting frequent cases of insecticide resistance are considered. Such is the case of the putative whitefly species Middle East‐Asia Minor I (MEAM1) ( Bemisia tabaci B‐biotype), for which little information is available in the Neotropics. Thus, the likely occurrence and levels of resistance to seven insecticides were surveyed among Brazilian populations of this species. The likelihood of control failure to the five insecticides registered for this species was also determined. Resistance was detected to all insecticides assessed reaching instances of high (i.e. >100×) to very high levels (>1000×) in all of them. Overall efficacy was particularly low (<60%) and the control failure likelihood was high (>25%) and frequent (70%) for the bioinsecticide azadirachtin, followed by spiromesifen and lambda‐cyhalothrin. In contrast, the likelihood of control failure was low for diafenthiuron, and mainly imidacloprid. As cartap and chlorantraniliprole are not used against whiteflies, but are frequently applied on the same host plants, inadvertent selection probably took place leading to high levels of resistance, particularly for the latter. The resistance levels of cartap and chlorantraniliprole correlated with imidacloprid resistance ( r > 0.65, P < 0.001), suggesting that the latter use may have somewhat favoured inadvertent selection for resistance to both compounds not used against the whitefly. A further concern is that chlorantraniliprole use in the reported scenario may allow cross selection to cyantraniliprole, a related diamide with recent registration against whiteflies demanding attention in designing resistance management programmes.