CHEMICAL COMPOSITION AND ACARICIDAL ACTIVITIES OF Indigofera suffruticosa ESSENTIAL OIL AGAINST TWO-SPOTTED SPIDER MITE

Utilization of synthetic acaricides causes negative side-effects on nontarget organisms and environment and most of the mite species such as two spotted spider mite,Tetranychus urticaeKoch, are becoming resistant to these chemicals. In the present study, essential oils of fennel,Foeniculum vulgareMill., and lavender,Lavandula angustifoliaMiller, were hydrodistilled using Clevenger apparatus and chemical composition of these oils was analyzed by GC-MS. Anethole (46.73%), limonene (13.65%), andα-fenchone (8.27%) in the fennel essential oil and linalool (28.63%), 1,8-cineole (18.65%), and 1-borneol (15.94%) in the lavender essential oil were found as main components. Contact and fumigant toxicity of essential oils was assessed against adult females ofT. urticaeafter 24 h exposure time. The essential oils revealed strong toxicity in both contact and fumigant bioassays and the activity dependeds on essential oil concentrations. Lethal concentration 50% for the population of mite (LC50) was found as 0.557% (0.445–0.716) and 0.792% (0.598–1.091) in the contact toxicity and 1.876 μL/L air (1.786–1.982) and 1.971 μL/L air (1.628–2.478) in the fumigant toxicity for fennel and lavender oils, respectively. Results indicated thatF. vulgareandL. angustifoliaessential oils might be useful for managing of two spotted spider mite,T. urticae.

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Effects of Growth Phase and Ultraviolet-B Pretreatment in Perilla Leaves on the Two-Spotted Spider Mite

Environmental Entomology ◽

10.1093/ee/nvaa055 ◽

2020 ◽

Vol 49 (4) ◽

pp. 886-894

Author(s):

Daichi Tomimori ◽

Munetaka Hosokawa ◽

Shinichi Aoki ◽

Masahiro Osakabe

Keyword(s):

Essential Oil ◽

Growth Phase ◽

Egg Production ◽

Oil Content ◽

Spider Mite ◽

Small Contribution ◽

Defense System ◽

Defense Compounds ◽

Flowering Phase ◽

Two Spotted Spider Mite

Abstract Perilla, Perilla frutescens (L.) Britton var. crispa (Thunb.) H. Deane, is traditionally cultivated as an edible/medicinal crop in East Asia. Its essential oil contains many bioactive compounds that are expected to have high pharmacological functionality, as well as antimicrobial and insecticidal activity. Spider mites are a major pest group for perilla cultivation. The two-spotted spider mite, Tetranychus urticae Koch, possesses divergent detoxification enzymes and has developed resistance against most acaricides. The essential oil content of perilla halves from the pre-flowering phase to the flowering phase, and ultraviolet (UV)-B radiation generally increases defense compounds. To clarify the effects of this change in essential oil content and the effects of UV-B pretreatment, we investigated the developmental success and egg production of T. urticae on leaves from the preflowering and flowering phases cultivated with and without nighttime UV-B irradiation. Both the parameters significantly increased on leaves from the flowering phase in comparison with that from the preflowering phase, suggesting that constitutively produced essential oil provided protection against mite pests in a growth phase-specific manner. The defense system also extended the developmental period of mites on red perilla leaves, but not on green perilla leaves, in preflowering phase. Although egg production was lower on red perilla leaves pretreated with UV-B, no negative effects were caused on the developmental success and duration on red and green perilla and the egg production on green perilla by UV-B pretreatment. Our findings reveal a significant impact of investment allocation of perilla plants and a small contribution of UV-B irradiation to the plant defense system.

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The Effect of Hemp Essential Oil on Mortality Aulacorthum Solani Kalt. And Tetranychus Urticae Koch

Ecological Chemistry and Engineering S ◽

10.1515/eces-2016-0037 ◽

2016 ◽

Vol 23 (3) ◽

pp. 505-511 ◽

Cited By ~ 6

Author(s):

Romuald Górski ◽

Krzysztof Sobieralski ◽

Marek Siwulski

Keyword(s):

Mortality Rate ◽

Essential Oil ◽

Tetranychus Urticae ◽

Spider Mite ◽

Fresh Matter ◽

Aqueous Emulsion ◽

Aulacorthum Solani ◽

Two Spotted Spider Mite ◽

Foxglove Aphid ◽

Tetranychus Urticae Koch

Abstract Investigations concerning the effect of hemp oil on mortality of the foxglove aphid (Aulacorthum solani Kalt.) and the two spotted spider mite (Tetranychus urticae Koch) were conducted in the years 2014-2015. The tested essential oil was produced at the Institute of Natural Fibers and Medicinal Plants in Poznan. It was obtained by steam distillation of fresh panicles of Polish hemp cultivars, Beniko, Bialobrzeskie and Silesia, with low cannabinoid contents, including THC (max. 0.2% plant fresh matter). The effect of essential oil on the investigated pests was determined following the application of aqueous emulsion solution at 0.02, 0.05 and 0.1%. Mortality of agrophages was determined 24, 48 and 72 h after treatment. In this study a very high efficacy of the essential oil produced from hemp panicles was found in the reduction of population size of the foxglove aphid (A. solani). Already at 24 h after its application at a concentration of 0.1% pest mortality rate was 98.20%, while after 48 h it reached 100%. A significant, although much lesser effect of oil on the aphid population was recorded when applying it at 0.05%, with the mortality rate of the true bug after 72 h amounting to 57.33%. Essential oil also showed an effect on the two spotted spider mite (T. urticae). Following the oil application, irrespective of its concentration, a significant effect on mite mortality was observed. Its action was the strongest at its highest concentration, ie 0.1%, while mortality of the pest at 24, 48 and 72 h after treatment was 83.28, 95.83 and 98.72%, respectively.

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Composition and Acaricidal Activity of the Resin's Essential Oil ofProtium bahianumDaly Against Two Spotted Spider Mite (Tetranychus Urticae)

Journal of Essential Oil Research ◽

10.1080/10412905.2007.9699310 ◽

2007 ◽

Vol 19 (4) ◽

pp. 379-383 ◽

Cited By ~ 32

Author(s):

Wendel J.T. Pontes ◽

José C.S. de Oliveira ◽

Claudio A.G. da Camara ◽

Adelmo C.H.R. Lopes ◽

Manoel Guedes Corrêa Gondim ◽

...

Keyword(s):

Essential Oil ◽

Tetranychus Urticae ◽

Spider Mite ◽

Acaricidal Activity ◽

Two Spotted Spider Mite

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Leaf Essential Oil Composition of Selected Strawberry Cultivars with Different Degrees of Susceptibility to Two-spotted Spider Mites

HortScience ◽

10.21273/hortsci.30.4.831c ◽

1995 ◽

Vol 30 (4) ◽

pp. 831C-831

Author(s):

Shahrokh Khanizadeh ◽

Andre Belanger

Keyword(s):

Essential Oil ◽

Spider Mite ◽

Field Trials ◽

Spider Mites ◽

Essential Oil Composition ◽

Considerable Variability ◽

Oil Composition ◽

Leaf Essential Oil ◽

Two Spotted Spider Mite ◽

Strawberry Cultivars

Considerable variability in susceptibility to two-spotted spider mite (TSSM) were observed for the strawberry cultivars used as parents and some of our promising selections. Large variation was observed for 9-octadecenal oil composition followed by linalool, C9H1002, decanal, β-cyclocitral, α-terpineol and (Z)-3-hexenol. The purpose of this research was to identify the relative susceptibility of selected strawberry lines to TSSM in relation to leaf essential oil composition. One objective of our breeding program is the early identification of susceptible lines and/or seedlings so that they can be eliminated prior to field trials.

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