Migration of diamondback moth, Plutella xylostella, across the Bohai Sea in northern China

Biology, Ecology, and Management of the Diamondback Moth in China

“…Migration of DBM elsewhere in the world is well documented but incompletely understood (26). Recent genetic (100) and trapping studies (24) in China provide complementary evidence for large-scale northern migrations in spring as successive generations (22) move to higher latitudes. Importantly, genetic data also support the hypothesis that smaller-scale reverse migrations to southern regions sometimes occur later in the year (100), providing the first, albeit indirect, evidence for return migration by DBM (Figure 3).…”

“…Southerly migrations in the reverse direction (red arrows) do occur but they are relatively rare(100). Light trapping studies show that migrations across the Bohai Sea in northern China (orange arrows) occur annually in the summer(24). Orange shading shows the northern limit at which overwintering can occur in some years.…”

Agricultural production: assessment of the potential use of Cas9-mediated gene drive systems for agricultural pest control

“…The DBM is notorious for evolving resistance to synthetic insecticides, with loss of control often emerging within a few years of commercialization of a new class of insecticide (Wang and Wu 2012). Although DBM cannot withstand cold winters, it is still a major, if sporadic, pest in temperate geographic areas because of its ability to migrate hundreds of miles, and in some cases over a thousand miles (Chapman et al 2002;Fu et al 2014). Broccoli has been genetically engineered to produce toxins from Bacillus thuringiensis (Bt toxins) that are effective against many DBM populations, but commercialization does not appear to be likely in the near future (Grzywacz et al 2010).…”

“…A question remains of whether this approach will be appropriate for DBM in areas where they can breed all year or overwinter successfully. While there appears to be limited movement of moths when they are in suitable habitats, they are known for long distance movement at other times (Chapman et al 2002;Fu et al 2014), so local releases of the engineered strain could lower numbers temporarily, but this would be expected to have limited value if there was re-infestation from other areas. Furthermore, in the northern areas, the population size in the early summer is very low, making small releases of the engineered strain feasible, but in tropical and sub-tropical areas, the population size tends to remain high, making suppression difficult.…”

Design, synthesis and insecticidal activities of N-(4-cyano-1-phenyl-1H-pyrazol-5-yl)-1,3-diphenyl-1H-pyrazole-4-carboxamide derivatives

“…1, those products of pyrazole derivatives have been widely reported. For instance, the Plutella xylostella are kinds of the regularly harmful pests of crops in the world, 10 and so far this sort of pests have become a tricky thing in pest control because of their resistance to various types of traditional insecticides. [7][8][9] However, the frequent and widespread use of traditional insecticides could potentially lead to the development of resistance and the implementation of anti-resistance management strategies.…”