Dynamics of Bemisia tabaci biotypes and insecticide resistance in Fujian province in China during 2005–2014

Abstract

The whitefly Bemisia tabaci (Gennadius) is an important agricultural insect pest worldwide. The B and Q biotypes are the two most predominant and devastating biotypes prevalent across China. However, there are few studies regarding the occurrence of the Q biotype in Fujian Province, China, where high insecticide resistance has been reported in the B biotype. Differences in some biological characteristics between the B and Q biotypes, especially insecticide resistance, are considered to affect the outcome of their competition. Extensive surveys in Fujian revealed that the B biotype was predominant during 2005–2014, whereas the Q biotype was first detected in some locations in 2013 and widely detected throughout the province in 2014. Resistance to neonicotinoids (that have been used for more than 10 years) exhibited fluctuations in open fields, but showed a continual increasing trend in protected areas. Resistance to lambda-cyhalothrin, chlorpyrifos, and abamectin exhibited a declining trend. Resistance to novel insecticides, such as nitenpyram, pymetrozine, sulfoxaflor, and cyantraniliprole, in 2014 was generally below a moderate level. A decline in insecticide resistance in the B biotype and the rapid buildup of protected crops under global temperature increase may have promoted the establishment of the Q biotype in Fujian.

Outbreaks of Bemisia tabaci Mediterranean species in vegetable crops in São Paulo and Paraná States, Brazil

“…MED is also known to develop resistance much faster than other whitefly species, such as pyriproxyfen (Horowitz et al, 2003(Horowitz et al, , 2005, acetamiprid (Horowitz and Kontsedalov, 2004;Horowitz and Ishaaya, 2014), imidacloprid (Karunker et al, 2008), thiamethoxam (Horowitz and Kontsedalov, 2004), and cyantraniliprole (Yao et al, 2017). In Israel, the dynamics of the whitefly populations on cotton were studied for several years in terms of management with insecticide and the predominant species.…”

Development of Bemisia tabaci MEAM1 and MED on Tomato (Solanum lycopersicum) Alone and in a Mixed Population

“…MED has demonstrated the ability to develop significantly higher levels of resistance to many modes of action than MEAM1, and expresses higher levels of detoxification compounds including glutathione s-transferases (Ye et al 2014;He et al 2018). The tendency of MED to develop higher levels of insecticide resistance than MEAM1 has contributed to the displacement of MEAM1 by MED in China, where mixed populations of MEAM1 and MED have been subjected to intensive insecticide selection pressure (Pan et al 2015;Yao et al 2017). Over-reliance on pyriproxyfen led MED to replace MEAM1 in Israeli cotton, a situation that has been reversed through improved insecticide resistance management (Horowitz et al 2005;Kontsedalov et al 2012).…”

Genotyping and Bio-Sensing Chemosensory Proteins in Insects

“…The Q biotype is particularly well known for its extremely high resistance capacity against xenobiotic neonicotinoids and a panoply of new insecticide chemicals such as nitenpyram, pymetrozine, sulfoxaflor, and cyantraniliprole. This would explain its cosmopolitan distribution and facile establishment on field crops [ 7 ]. Identification of the biotype is therefore a crucial fundamental and unavoidable step to design the selection of insecticides for control of a particular insect pest species such as B. tabaci .…”