Rice Science

RICE SCIENCE ›› 2006, Vol. 13 ›› Issue (2): 146-148 .

• Short Communication • Previous Articles    

Repellent Activity of Extracts of Wild Rice Species against Panonychus citri and Aphis citricola in Associated with Esterase Isoenzyme in Insests

WAN Shu-qing1, LIU Xiang-fa1, FENG Guo-zhong1, PAN Da-jian2   

  1. 1College of Resources and Environment, South China Agricultural University, Guangzhou 510642, China; 2Rice Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
  • Received:2006-02-08 Online:2006-06-28 Published:2006-06-28
  • Contact: WAN Shu-qing
  • Supported by:
    the National Natural Science Foundation of China (No. 30170097).

PDF

Abstract: Six species of wild rice with different ecophenotypes including Oryza grandiglumis (E6-1, E6-3 / 6-4), O. minuta (E13-9, E13-13), O. officinalis (E15-8, E15-13), O. punctata (E16-1, E16-3, E16-13), O. granulata (E7-4), and O. latifolia (101392, E9-1, E9-10) were extracted with methnol and the repellent activity of the extracts against the two insects Aphis citricola and Panonychus citri were studied. The extracts of O. officinalis E15-8 showed higher repellent rate to the two insects than those of the other species. The repellent rates of the extracts of E15-8 to P. citri and A. citricola were 83.26% and 87.86% at 5×104 µg/mL in 24 h and 87.95% and 82.43% in 48 h, respectively. The extracts of O. officinalis E15-8 had the effect of inhibition to the esterase of the two insects.

Key words: wild rice, Panonychus citri, Aphis citricola, repellent activity, esterase isoenzyme, extracts, biological control