| Title: | Fatal Attraction: Ricinus communis Provides an Attractive but Risky Mating Site for Holotrichia parallela Beetles |
| Author(s): | Zhang H; Li W; Luo Q; Yang L; Gong D; Teng X; Guo X; Yuan G; |
| Address: | "Department of Entomology, College of Plant Protection, Henan Agricultural University, No. 63 Nongye Road, Zhengzhou, Henan Province, China. Department of Entomology, College of Plant Protection, Henan Agricultural University, No. 63 Nongye Road, Zhengzhou, Henan Province, China. guoxianru@126.com. Department of Entomology, College of Plant Protection, Henan Agricultural University, No. 63 Nongye Road, Zhengzhou, Henan Province, China. hnndygh@126.com" |
| DOI: | 10.1007/s10886-018-0994-5 |
| ISSN/ISBN: | 1573-1561 (Electronic) 0098-0331 (Linking) |
| Abstract: | "The castor bean, Ricinus communis L., is a non-host plant for the large black chafer, Holotrichia parallela Motschulsky (Coleoptera: Scarabaeidae). In laboratory bioassays we found that this plant was no less attractive than the main host plant (peanut, Arachis hypogaea) and three food plant species: velvetleaf (Abutilon theophrasti), the glossy privet (Ligustrum lucidum), and the Siberian elm (Ulmus pumila). In field trapping experiments a Soxhlet extract of castor bean leaves caught more beetles than the optimal sex lure blend [(R)-(-)-linalool and (L)-isoleucine methyl ester blended in a ratio of 1:4], compared at equal doses (500 mul), and laboratory bioassays indicated that a castor bean plant could enhance the attractiveness of different blend ratios of sex lures. Olfactometer bioassays showed that males prefer volatiles emitted from different combinations of castor bean plant extracts and a signaling female over a female alone. In the presence of castor bean plants copulation rates of H. parallela were highest among all test environments both in laboratory bioassays (60%) and in field tests (70%). This study, combined with our previous observation of the feeding behavior of H. parallela adults on castor bean leaves, suggests that castor bean plants may provide an attractive but risky mating site for H. parallela beetles. The enhancement of male mate-location and copulation rate in the presence of castor bean plants can balance its paralytic effects on H. parallela after intake of potential toxins contained in its leaves" |
| Keywords: | "Animals Castor Bean/*metabolism Coleoptera/*drug effects Female Male Risk Sexual Behavior, Animal/*drug effects Volatile Organic Compounds/metabolism/pharmacology Castor plant Fatal attraction Holotrichia Non-host plant Risky mating site;" |
| Notes: | "MedlineZhang, Hongfei Li, Weizheng Luo, Qianwen Yang, Lei Gong, Dongfeng Teng, Xiaohui Guo, Xianru Yuan, Guohui eng 31471772/Chinese National Natural Science Foundation/ 2018/08/18 J Chem Ecol. 2018 Oct; 44(10):965-974. doi: 10.1007/s10886-018-0994-5. Epub 2018 Aug 16" |
