›› 2018, Vol. 61 ›› Issue (9): 1047-1053.doi: 10.16380/j.kcxb.2018.09.006

• RESEARCH PAPERS • Previous Articles     Next Articles

Effect of host plants on the movement rate and predation ability of Neoseiulus bicaudus (Mesostigmata: Phytoseiidae)

ZHANG Yan-Nan1,2,#, GU Jia-Min1,#, CHEN Jing1, WANG Pei-Ling1,*, ZHANG Jian-Ping1,*   

  1.  (1. Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resource Utilization, Universities of Xinjiang Uygur Autonomous Region, Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, College of Agriculture, Shihezi University, Shihezi, Xinjiang 832000, China; 2. College of Life Science and Technology, Mianyang Normal University, Mianyang, Sichuan 621000, China)
  • Online:2018-09-20 Published:2018-09-20

Abstract: 【Aim】 The predation ability of Neoseiulus bicaudus depends on its movement rate. This study analyzed the effect of five host plants on the movement rate of N. bicaudus in order to explore the predation ability of N. bicaudus to Tetranychus turkestani on different host plants. 【Methods】 The movement rates of female adults of N. bicaudus on five host plants including green bean (Phaseolus vulgaris), cotton (Gossypium hirsutum), tomato (Solanum lycopersicum), eggplant (Solanum melongena) and cucumber (Cucumis sativus) were recorded by digital image processing technology, and the effects of host plants on the predating functional response of N. bicaudus were compared by direct observation. 【Results】 The movement rates of N. bicaudus on the fivehost plants ranked in the descending order as green bean (0.62 cm/s) and cotton (0.60 cm/s)>cucumber (0.38 cm/s) and eggplant (0.36 cm/s)>tomato (0.27 cm/s). Further study on predating functional responses of N. bicaudus on the five host plants indicated that the prey consumption increased as the prey density increased until it reached a plateau where the consumption rate remained constant, exhibiting a Holling type II response. The attack rate (a) of N. bicaudus against T. turkestani on green bean (1.124) was the highest. The handling time (Th) on cotton (0.059) was the shortest. The predation abilities of N. bicaudus on green bean and cotton were strong, with the a/Th values of 18.177 and 16.763, respectively, while those on tomato, eggplant and cucumber were weak, with the a/Th values of 6.780, 6.537 and 6.369, respectively. 【Conclusion】 On green bean and cotton, the movement rates of N. bicaudus are the fastest and its predation ability is the strongest.

Key words: Neoseiulus bicaudus, Tetranychus turkestani; host plants, movement rate, predating functional response