Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2023, Vol. 44 ›› Issue (5): 1023-1029.DOI: 10.3969/j.issn.1000-2561.2023.05.017

• Plant Protection & Bio-safety • Previous Articles     Next Articles

Morphological Characteristics and the Change Trends of the Internal Reproductive System of Paurocephala sauteri Adults in Different Developmental Stage

WEI Hongxian1, GENG Tao2, WU Huazhou2, LOU Dezhao2, WU Chunbiao1, XIE Yunhui3, LU Fuping2,*(), WANG Shuchang2,*()   

  1. 1. Hainan University, Haikou, Hainan 570228, China
    2. Environment and Plant Protection Institute, Chinese Academy of Tropical Agriculture Sciences / Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture & Rural Affairs / Hainan Provincial Key Laboratory of Monitoring and Control of Tropical Agricultural and Forest Invasive Alien Pests, Haikou, Hainan 571101, China
    3. Guizhou University, Guiyang, Guizhou 550025, China
  • Received:2022-08-29 Revised:2022-11-19 Online:2023-05-25 Published:2023-06-07
  • Contact: *LU Fuping,E-mail:fuping_36@163.com;WANG Shuchang,E-mail:wangshuchang2001@163.com


Paurocephala sauteri, characterized by small individuals, rapid reproduction and overlapped generations, is the most damaging pest of mulberry trees in tropical and subtropical areas. It happens in seedling period, leading to yield loss over 40%, or even out of harvest, and is very difficult to control. In order to accurately predict and efficiently control the pest, and to improve the yield and quality of mulberry leaves, the internal reproductive system of the male and female adults of the pest in different developmental periods was dissected and observed to clarify the morphological characteristics and changes of the internal reproductive system of male and female adults of the pest before and after mating. Except for 2 pairs of lateral oviducts the composition of the internal reproductive system of the female adults is similar to Trioza erytreae (Del guercio), and male adults is highly similar to Diaphorina citri (Kuwayama). Compared with the pre-mating period, the length of spermatheca in mating and post-mating periods reached nearly 1.63 times and 1.85 times, and the width increased by about 1.74 times and 1.84 times respectively, with significant differences in each period (P<0.05), the length and width of eggs increased rapidly, to mating period increased by nearly 2 times (P<0.05). At the same time, several large vesicles appeared inside the egg in mating period and disappeared in post-mating period, them should be trophoblasts, providing nutrition for oocytes. Compared with the pre-mating period, the testes of the male increased to the maximum in the mating period and shrank to the minimum in the post-mating period. There were significant differences in the three periods (P<0.05), while the length and width of the seminal vesicle both significantly increased to about twice (P<0.05) in mating and post-mating periods. This study has practical significance to precisely judge and determine the appropriate period of prevention and control, to clone reproductive-related genes, to develop new gene targeting agents, and to formulate efficient prevention and control measures of P. sauteri.

Key words: Paurocephala sauteri, internal reproductive system, morphological characteristics, change trends

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