Researchers at the Chinese Academy of Agricultural Sciences published the genome sequence of the Fall armyworm website BioRxiv, revealing for the first time the biological genetic background and drug resistance characteristics of the Fall armyworm population that invaded China from the genomic level. The Fall armyworm, also known as the Autumn Marching Bug, is a species of slug native to North and South America that was first discovered in Africa in 2016 and has spread to China in the past year.
As of mid-August, 24 of the country’s 34 provinces had seen grass ymmoids, affecting 950,000 hectares of crops, according to a report by the Ministry of Agriculture. Grass-obsessed nightworms can cause corn to yield up to 50% less, and its adult worms can migrate hundreds of kilometers.
The researchers resequenced 105 samples from 16 provinces (cities and districts) to reveal that the Fall armyworms that invaded our country were a “hybrid type” dominated by a corn-shaped genetic background.
The test of resistance-related gene scanning found that the invasive Chinese population had a high frequency of resistance to traditional organophosphate pesticides, organochlorine pesticides and pyrethroid stamina. However, no gene variant sites of new amide pesticides and Bt toxin resistance were detected, indicating a high risk of resistance to the associated traditional pesticides.
The study shows that organophosphate pesticides, organochlorine pesticides and deworming chrysanthemums and other traditional pesticides are not suitable for use at present.