Studies on the suitability of the Hap1 type Aphis gossypii on six species of Asteraceae
Aphis gossypii Glover is a polyphagous pest that causes significant damage to crops,and its populations have diverged significantly.In order to assess the suitability of Hap1 type A.gossypii for early spring Asteraceae,the growth and development of Hap1 type A.gossypii were observed on six early spring Asteraceae species.These species included Ixeris polycephala,Hemisteptia lyrata,Taraxacum mongolicum,Glebionis coronaria,Lactuca sativa,and Sonchus asper.The study's results showed that Hap1 type A.gossypii successfully established populations on the six above-mentioned species of Asteraceae,with differences observed in their life table parameters.Hap1 type A.gossypii was able to establish on G.coronaria,I.polycephala,and H.lyrata,but with variations in the life table parameters.When feeding on L.sativa and S.asper,Hap1 type A.gossypii had a litter size of approximately 6 days,with an average litter size of 3.09 and 1.72 per head per day,respectively,and a lifespan of around 14 days.Days were spent observing Hap1 type A.gossypii as they fed on T.mongolicum for 2 days,with an average of 1.46 pups per head per day.The mortality rate exceeded 60%on day 8,and the lifespan was 6.74 days.The study results revealed that out of the six species of Asteraceae mentioned,I.polycephala,H.lyrata,and G.coronaria were found to be suitable hosts for Hap1 A.gossypii.L.sativa and S.asper were also identified as hosts for Hap1 A.gossypii,whereas T.mongolicum was shown to be unsuitable as a host for Hap1 A.gossypii.This study serves as a scientific foundation for further understanding the host transfer patterns of Hap1 type A.gossypii,and also establishes a theoretical basis for the development of environmentally friendly prevention and control technology for A.gossypii.
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