Adaptability of Toxoptera aurantii (Hemiptera: Aphididae) to Different Tea Cultivars

Yingqin He, Changhao Lu, Wenbin Jiang, Wenlong Chen, Jinjuan Fan, Suzhen Niu and Degang Zhao ()
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Yingqin He: Guizhou Plant Conservation Center, Guizhou Academy of Agriculture Science, Guiyang 550006, China
Changhao Lu: Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Scientific Observing and Experimental Station of Crop Pest in Guiyang, Ministry of Agriculture, Guizhou University, Guiyang 550025, China
Wenbin Jiang: College of Tea Science, Guizhou University, Guiyang 550025, China
Wenlong Chen: Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Scientific Observing and Experimental Station of Crop Pest in Guiyang, Ministry of Agriculture, Guizhou University, Guiyang 550025, China
Jinjuan Fan: College of Tea Science, Guizhou University, Guiyang 550025, China
Suzhen Niu: College of Tea Science, Guizhou University, Guiyang 550025, China
Degang Zhao: Guizhou Plant Conservation Center, Guizhou Academy of Agriculture Science, Guiyang 550006, China

Agriculture, 2023, vol. 13, issue 10, 1-11

Abstract: The adaptability of phytophagous insects to different host plants is a key determinant of their population propagation. Understanding the feeding behaviour and population dynamics of insects is crucial for elucidating host adaptability and screening for insect-resistant germplasms. Here, we investigated Toxoptera aurantii (Hemiptera: Aphididae) adaptability using electropenetrography and assessed its population growth on seven tea cultivars: Huangjinya (HJY), Qianmei601 (QM601), Fudingdabaicha (FD), Longjing43 (LJ43), Qiancha1 (QC1), Qiancha8 (QC8) and Qiancha10 (QC10). The results showed that the feeding behaviour of T. aurantii differed significantly depending on the tea cultivars. The initial probing of T. aurantii on HJY was the earliest among the seven host plants. Aphids on QC1 and QC10 displayed an increased duration of stylet probing and decreased ingestion of phloem sap, whereas a contrasting trend was observed for aphids on HJY. In addition, the mechanical resistance of T. aurantii fed on HJY and QM601 during the probing phase was significantly lower than that of aphids fed on other cultivars. Population dynamic parameters revealed that the growth rate of T. aurantii reared on HJY was the fastest, and its population quantity within 15 days was markedly higher than that of aphids fed on other cultivars. These findings demonstrate that HJY is the most suitable host plant, whereas QC1 and QC10 are less suitable hosts for T. aurantii , although the aphids successfully survived on all the selected tea cultivars. Our results provide valuable information for the biological control of T. aurantii using resistant tea varieties.

Keywords: Toxoptera aurantii; electrical penetration graph; feeding behaviour; population dynamics; host adaptability (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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