Volatile Component Analysis of Michelia alba Leaves and Their Effect on Fumigation Activity and Worker Behavior of Solenopsis invicta

Abstract

Volatile compounds from mashed (fresh, fallen, and dried) leaves ofMichelia alba were collected via solid-phase microextraction and werethen identified via gas chromatography-mass spectrometry. The resultsshowed that linalool was the dominant component in different leaves,together with caryophyllene, β-elemene, and selinene, the contents ofwhich vary across the samples. The fumigation bioassay results showedthat the volatiles from M. alba leaves exhibited insecticidal activity againstred imported fire ant workers, and the mortality of workers could reachup to 100% after the fallen leaves were treated for 16 h. Mashed freshleaves could effectively reduce the aggregation and drinking ability ofworkers. The volatile substances released from the mashed leaves mightkill the ants, or affect their behavior and weaken the activity by interferingtransmit information between ants. A comprehensive consideration ofthe economic and ecological value of M. alba shows that fallen leavesmight be a good resource to control red imported fire ant.

Prevalence and management of Solenopsis invicta in China

“…For example, an ethanol extract of the shrub L. camara exhibited 100% killing effect against S. invicta workers in five days in an indoor experiment (Zhong et al 2008). Volatiles from M. alba leaves caused 100% mortality of S. invicta workers in 16 h in a fumigation bioassay (Qin et al 2018). Decylamine from Monomorium minimum show toxicity by causing a knockdown effect and suppressed the digging behavior in S. invicta workers .…”

“…Green insecticides were also evaluated for their effect on S. invicta. The toxicities of plant extracts derived from Lantana camara, Pronephrium megacuspe, Cinnamonum camphora, Murraya exotica, Viburnum odoratissimum, Michelia alba, and Periploca sepium were also tested (Zhong et al 2008;Fu et al 2015;Huang et al 2016aHuang et al , 2016bHui et al 2014;Qin et al 2018;Zhang et al 2017b;Huang et al 2019). Many of these plant extracts exhibited excellent fumigation and contact toxicity under laboratory condition.…”

Naturally Occurring Compounds/Materials as Alternatives to Synthetic Chemical Insecticides for Use in Fire Ant Management

“…In addition to ethyl format and allyl isothiocyanate, many other naturally occurring compounds/materials have been tested as fumigants against fire ants (Table 6), including defensive compounds from other ants [55], plant materials [106][107][108], plant essential oils and their individual components [59,[66][67][68]86,94,109,110]. As expected, some fire ant repellants are also efficient fire ant fumigants.…”

Biotechnological Approaches for the Improvement of Magnolia Genus Grown in Indonesia

“…Shang et al [3] noted that fresh flowers contain low concentration of terpenes and esters compared to frozen and withered. Bawa [64] Flower (juvenile, middle, whitening phase) leaves (tender, grow-up, fallen phase), tender twigs -Ultrasound extract -HPLC -Flower: Linalool (1,63-4,89%), juvenile is highest -Leaves: Linalool (0,21-0,65%), fallen is highest -Tender twigs: Linalool (0,43%) Xia et al [9] Fresh, fallen, and -Solid-phase Main compound Qin et al [65] dried leaves microextraction -GC-MS -Fresh: linalol (26,10%), isocaryophyllene, aromadendrene, α-caryophyllene and (-)-γcadinene, total volatile (40%) -Fallen: linalool (40,52%), β-elemene (11,94%), β-caryophyllene (10,78%) -Dried: linanol (36,52%), β-elemene, βcaryophyllene, α-selinene, α-cubebene, total volatile (70%) Figure 3. Eleven stages of M. alba flower development [5,19] Tissue culture of M. alba Table 5 showed tissue culture studies of M. alba that had been conducted by some authors in Indomalaya ecozone.…”