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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2019年56 No.6

Comparison of Neoseiulus californicus and Neoseiulus barkeri as biological controls for Tetranychus urticae
Author of the article:WANG Man;LI Bo;HUANG Jie;MEN Xing-Yuan;JI Jie;LIU Yong-Jie;YIN Shu-Yan
Author's Workplace: College of Plant Protection, Shandong Agricultural University, Taian 271018, China; Forestry Bureau of Taian City, Taian271000, China; Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan 250100, China; Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
Key Words:Neoseiulus californicus; Neoseiulus barkeri; Tetranychus urticae; functional response; prey selection; predation interference
Abstract:[Objectives]  To compare the effectiveness of Neoseiulus californicus and Neoseiulus barkeri as biological controls for Tetranychus urticae and thereby determine which species would be the better biological control for T. urticae in orchards. [Methods]  The predation of adult female N. californicus and N. barkeri on different developmental stages of T. urticae was studied in the laboratory using the functional response method and the functional response of N. californicus and N. barkeri to different developmental stages of T. urticae were fitted to the Holling II equation. [Results]  The predatory capacity of these two predatory mites decreased with spider mite size. Predation was greatest on eggs, followed by larvae, protonymphs, deutonymphs and adults. The capacity of N. barkeri to prey on eggs and larvae of T. urticae was stronger than that of N. californicus; the values of the functional response parameter a/Th were 55.2% and 30.1% higher, respectively. The capacity of N. californicus to prey on protonymphs and deutonymphs of T. urticae was greater than that of N. barkeri; a/Th values were 67.5% and 114.5% higher, respectively. The capacity of both predatory mites to prey on adult female T. urticae was similar (a/Th = 4.5). Both N. californicus and N. barkeri preferred T. urticae eggs and larvae to nymphs and adults. There was evidence of intraspecific interference in the predation of N. californicus and N. barkeri on T. urticae. The interference coefficient of N. californicus was slightly higher than that of N. barkeri. [Conclusion]  N. californicus has greater capacity to prey on T. urticae than N. barkeri under stable laboratory conditions.
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