Effects of different wheat varieties on the development of Sitobion avenae

Author of the article:FAN Ming-Yuan；LIU Jie；DUAN Xue-Ying；ZHANG Nai-Zhao；GAO Feng

Author's Workplace：Colloge of Plant Protection, China Agricultural University, Beijing 100193, China； Colloge of Plant Protection, China Agricultural University, Beijing 100193, China；Colloge of Plant Protection, China Agricultural University, Beijing 100193, China；Colloge of Plant Protection, China Agricultural University, Beijing 100193, China；Colloge of Plant Protection, China Agricultural University, Beijing 100193, China；Colloge of Plant Protection, China Agricultural University, Beijing 100193, China

Key Words：Sogatella furcifera; migration dynamics; mesoscale source areas; trajectory analysis

Abstract：

[Objectives]  The wheat aphid Sitobion avenae is an important insect pest of wheat in China. Due to its wide host range, high fecundity and adaptability, this species greatly reduces China's annual wheat yield. [Methods]  The growth and development of S. avenae raised on different wheat varieties were compared under laboratory conditions to inform the selection and breeding of aphid-resistant wheat varieties. [Results]  The different wheat varieties had different effects on the growth and development of S. avenae. Nymphs fed on the Mianyang 4 wheat variety had the longest average developmental duration (180.86 h) whereas those fed on the Miannong 4 had the shortest (172.92 h). These two wheat varieties had significantly different effects on the duration of the 1^st and 2^nd instar nymph stages. Adults raised on the Miannong 4 wheat variety were the heaviest on average (0.70 mg) whereas those raised on the Rongmai 4 variety were the lightest (0.50 mg). There were no significant differences in the weights of adult aphids raised on the Mianyang 31, Mianmai 1403 or Chuanmai 55 wheat varieties. The average fecundity of females raised on Chuanmai 55 was 23.1, significantly higher than that of those raised on the other four wheat varieties. Adults raised on Chuanmai 55 also had the longest average lifespan (20.93 d), whereas those raised on Mianmai 1403 had the shortest (15.57 d). Both these values are significantly higher, and lower, respectively, than those of adults raised on the other three wheat varieties, which were not significantly different from each other. [Conclution]  The growth and development of larva S. avenae raised on Miannong 4 were shortened, which might accelerate the population growth rate and lead to more damage to wheat. However, the larva S. avenae fed on mianyang 31 had a longer growth and development period, meaning the population growth rate was shortened and the damage might become weakened. According to the fecundity and adult developmental period, the adult S. avenae was more suitable to Chuanmai 55.