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Effects of feeding RbCl with different dosages on Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) and marking efficiency.

LI Guo-ping1, CUI Jian-xin2, HUANG Jian-rong1, TIAN Cai-hong1, FENG Hong-qiang1*, ZHONG Jing1, HUANG Bo1, SONG Guo-jing1#br#   

  1. (1Henan Key Laboratory of Crop Pest Control, Key Laboratory of Integrated Pest Management on Crops in Southern Region of North China, Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China;  2Department of Plant Protection, Henan Institute of Science and Technology, Xinxiang 453003, Henan, China).
  • Online:2016-10-10 Published:2016-10-10

Abstract: Marking insects with Rb is a low cost, easy to use and environmentally safe technique in entomological research for understanding the insect population dynamics, migration, dispersal, mating competition, feeding behavior, and other ecological interactions. The ideal marker should persist without inhibiting the insect’s “normal” biology. The present study investigated the influence of Rb incorporated into larvae diet on the marking efficiency and life parameters of cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae). Feeding 1000-4000 mg·L-1 RbCl in artificial diet effectively marked the adults without any negative effect on the survival, development and flight. Rb could be detected in the adults for at least 10 days. Furthermore, Rb was also detected in the unmarked (not fed RbCl) females when they mated with males feeding on a diet containing RbCl. Therefore, 1000-4000 mg·L-1 are the suitable RbCl concentrations for marking cotton bollworm.

Key words: multiple timescales, ecological dynamic model, nitrogen retention effect, influencing factors, Shanmei Reservoir.