Attractiveness of plant volatiles on natural enemies in non-crop habitats in wheat fields
Author of the article:LI Yan-Hong1, 2** ZHANG Xing-Rui1 SU Jian-Wei3 XU Yong-Yu2 WANG Xiao-Zhou1, 2 GE Feng1***
Author's Workplace:1. Shandong Key Laboratory for Green Prevention and Control of Agricultural Pests, Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan 250100, China; 2. College of Plant Protection, Shandong Agricultural University, Tai’an 271000, China; 3. State Key Laboratory of Animal Biodiversity Conservation and Integrated Pest Management, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
Key Words:wheat field; non-crop habitat; plant volatile; natural enemies; attraction effect
Abstract:
[Aim] Compare the attracting effects of seven kinds of plant volatile
compounds, including trans-β-Farnesene, nerolidol, 6-Methyl-5-hepten-2-one, cis-3-Hexenyl acetate, eugenol, linalool, cis-Jasmonanone, and
their combinations on natural enemies in the woods around wheat fields, so as
to provide a reference for the ecological prevention and control of wheat
fields. [Methods] In the spring
of 2024 around the wheat field, the seven plant volatiles were combined to
create lure balls for natural enemies. Natural enemies were captured by hanging
sticky traps under the lure balls to assess the number of captured natural
enemies. [Results] The attracting
effect of the single plant-derived volatile compound, nerolidol with a
concentration of 10%, on hoverflies is significantly higher (P=0.046)
than that of the control group (without plant-derived volatile compounds),
being 87% more than the control. The combination of nerolidol at a
concentration of 6.98% and 6-Methyl-5-hepten-2-one also shows a significantly
higher (P=0.040) attracting effect on hoverflies than the control, being
810% more than the control. The combination of nerolidol at a concentration of
4.76% and trans-β-Farnesene has a significantly higher attracting effect
on hoverflies (P=0.045) and ladybirds (P=0.038) than the control,
being 767% and 725% more than the control respectively. However, after adding trans-β-Farnesene
and 6-Methyl-5-hepten-2-one respectively to these two combinations, there is no
significant difference in the attracting effect on natural enemies of pests
compared with the control (P>0.05). [Conclusion] The combination of nerolidol and 6-Methyl-5-hepten-2-one
exhibits the best attraction effect on hoverflies, followed by the combination
of nerolidol and trans-β-Farnesene. The combination of nerolidol and trans-β-Farnesene
exhibits the best attraction effect on ladybirds.