Violet light is the most effective wavelength for recruiting the predatory bug Nesidiocoris tenuis
Nesidiocoris tenuis (Heteroptera: Miridae) is a zoophytophagous mirid bug that is used as a biological control agent for agricultural pests including whiteflies. N. tenuis is mass-reared commercially and can be easily bred on banker plants. However, there are still difficulties in establishing populations on crops. Light illumination is a promising candidate for recruiting N. tenuis to crop plants. In this study, we investigated whether N. tenuis has a particular spectral preference using a six-arm arena equipped with six monochromatic LED lights: UV (365 nm), violet (405 nm), blue (450 nm), green (525 nm), orange (590 nm), and red (660 nm). Adult bugs were introduced into the arena, and phototactic behavior was observed. A greater number of male bugs chose violet light, whereas female bugs chose violet and UV light equally. We next examined the effects of violet illumination in a tomato greenhouse. In conventional plots, bugs remained near banker plants, whereas in illuminated plots, bugs immediately dispersed from the plants and became uniformly distributed in the greenhouse. Based on these results, we conclude that violet is a promising wavelength for the recruitment and establishment of N. tenuis on crop plants.
KeywordsPhototaxis Behavioral manipulation IPM Optical manipulation Wavelength preference
This work was supported by the Cabinet Office, Government of Japan, Cross-ministerial Strategic Innovation Promotion Program (SIP), “Technologies for creating next-generation agriculture, forestry and fisheries” (Funding agency: Bio-oriented Technology Research Advancement Institution, NARO) and JSPS KAKENHI Grant Nos. 25660268 and 16K14868 for MS.
- Abe J (2016) Insectary plants and indigenous natural enemies applicable for the conservation biological control. Mon J Agric Ext 53:19–21Google Scholar
- Hinomoto N, Nagasaka Y, Goto C, Ohara S, Tedzuka T (2015) Biological control of Thrips tabaci by omnivorous predator Nesidiocoris tenuis on cucumbers in greenhouses. Ann Rep Kanto-Tosan Pl Prot Soc 62:125–129Google Scholar
- Nanya K, Ishigami Y, Hikosaka S, Goto E (2012) Effects of blue and red light on stem elongation and flowering of tomato seedlings. VII International Symposium on Light in Horticulture 956:261–266Google Scholar
- NARO (2015) Manual for micro-pest control by Nesidiocoris tenuis. http://www.naro.affrc.go.jp/publicity_report/publication/laboratory/narc/manual/060741.html
- Vänninen I, Rönnqvist M, Dahlqvist M, Forsström J (2011) Nesidiocoris tenuis as an invasive pest in Finnish tomato crops: attempt to eradicate the bugs with nicotine-based programmes. IOBC/WPRS Bull 68:185–188Google Scholar
- Warrant E, Nilsson DE (2006) Invertebrate vision. Cambridge University Press, CambridgeGoogle Scholar
- Watanabe Y, Yasuda T, Yoneda T, Nakano A (2016) Examination of irradiation conditions using LED light for the growth of tomato seedlings. Bull Nat Inst Veg Tea Sci 15:57–66Google Scholar
- Wei D, Xian X, Zhou Z, Wang Z, Zhou X, Huang J (1998) Preliminary study on the functional responses of Cyrtopeltis tenuis to Spodoptera litura. Acta Agric Univ Henan 32:55–59Google Scholar