Abstract
Keywords. Neuroptera, Chrysopidae, Chrysoperla, green lacewings, attractant, phenylacetaldehyde Abstract. At five sites in Hungary and Italy, traps baited with phenylacetaldehyde caught significantly higher numbers (10 to 100 times more) of green lacewings than unbaited traps, which demonstrates that this compound is an attractant. Traps with three bait dispensers usually caught more than those with one dispenser, but the difference was significant only at two out of five test sites. There was no difference in the numbers caught by sticky delta and funnel traps baited with phenylacetaldehyde. However, funnel traps could be adapted to catch living green lacewings. The vast majority of the specimens belonged to the Chrysoperla carnea spe- cies complex. Ch. carnea sensu lato dominated the catches at all sites. At some sites 3-11% of the insects caught were Ch. lucasina Lacroix. Phenylacetaldehyde-baited traps were attractive to both sexes, but generally more females were caught than males. Funnel traps baited with three dispensers of phenylacetaldehyde caught green lacewing adults throughout the season in Hungary.
Highlights
The common green lacewing Chrysoperla carnea s.l. is an important predator in the biological control of pest aphids, scales, caterpillars and other pests of many crops (McEwen et al, 2001)
Traps baited with one or three polyethylene bag bait dispensers loaded with phenylacetaldehyde caught higher numbers of green lacewings than unbaited traps (Table 1)
The difference was significant at all sites where sufficient numbers were captured, which confirms that this compound is an attractant for green lacewings in the field (Table 1)
Summary
The common green lacewing Chrysoperla carnea s.l. is an important predator in the biological control of pest aphids, scales, caterpillars and other pests of many crops (McEwen et al, 2001). A synthetic attractant for green lacewings might be useful for monitoring lacewing abundance or manipulating lacewing population densities. The attractants for green lacewings were reviewed by Szentkirályi (2001). In addition in a laboratory olfactometer bioassay, tethered female green lacewings spent ca 70% of the total time flying towards reaction mixtures thought to produce indole acetaldehyde (van Emden & Hagen, 1976). This led van Emden & Hagen (1976) to suggest that indole acetaldehyde is an attractant, they never tested the synthetized pure compound in the laboratory or the field
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
