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Diversity, Daily Activity Patterns, and Pollination Effectiveness of the Insects Visiting Camellia osmantha, C. vietnamensis, and C. oleifera in South China

by Wei Wei 1,†, Haipan Wu 2,†, Xueyuan Li 2,†, Xing Wei 2, Wen Lu 2 and Xialin Zheng 2,*
1
Guangxi Forestry Research Institute, Guangxi Key Laboratory of Special Non-wood Forest Cultivation & Utilization, Improved Variety and Cultivation Engineering Research Center of Oiltea Camellia in Guangxi, Nanning 530002, Guangxi, China
2
Guangxi Key Laboratory of Agric-Environment and Agric-Products Safety, National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning 530004, Guangxi, China
*
Author to whom correspondence should be addressed.
These authors contributed equally.
Insects 2019, 10(4), 98; https://doi.org/10.3390/insects10040098
Received: 21 February 2019 / Revised: 28 March 2019 / Accepted: 29 March 2019 / Published: 2 April 2019
Camellia spp., which are self-incompatible plants, are some of the most important woody species producing edible oil in Southeast Asian countries. However, the demand for camellia oil currently exceeds the supply due to low product yields that have resulted from a decrease in pollination services. Although Camellia osmantha, C. vietnamensis, and C. oleifera are cultivated in South China, little is known about the correspondence between pollinator abundance and pollinator services for this plant genus. In this study, the diversity, daily activity patterns, and pollination effectiveness of insects visiting C. osmantha, C. vietnamensis and C. oleifera were investigated. A total of 24 species, belonging to four orders and 11 families, of visiting insects were identified. Apis cerana cerana Fabricius, Vespa bicolor Fabricius, V. velutina Lepeletier, V. ducalis Smith, and Phytomia zonata Fabricius were the dominant pollinators. The daily activity peaks of the five visiting insects were between 10:00 and 14:00, which may have been related to the pattern of floral resource production (particularly nectar). Cross-pollination by insects significantly increased the fruit production rates of C. osmantha, C. vietnamensis, and C. oleifera. Therefore, the wild bees and flies that pollinate wild and cultivated Camellia plants should be protected in South China. View Full-Text
Keywords: visiting insects; hymenoptera; Diptera; cross-pollination; fruit production rate visiting insects; hymenoptera; Diptera; cross-pollination; fruit production rate
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Wei, W.; Wu, H.; Li, X.; Wei, X.; Lu, W.; Zheng, X. Diversity, Daily Activity Patterns, and Pollination Effectiveness of the Insects Visiting Camellia osmantha, C. vietnamensis, and C. oleifera in South China. Insects 2019, 10, 98.

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