Behavioral and Insecticidal Effects of Three Plant Oils on Bemisia tabaci

Hussein, Hanaa S.

doi:10.3923/je.2017.87.95

Cited by 2 publications

(1 citation statement)

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“…The difference in the LC 50 value of thyme oil across life stages suggests a difference in their vulnerability, second instar nymph being most sensitive, followed by egg and pupa. In Bemisia tabaci, treatment of thyme oil at 1000 ppm caused a 45 to 60 per cent reduction in egg hatching, 76.42 per cent mortality in the nymphs and 58.93 per cent inhibition in adult emergence (Hussain, 2017). Yang et al (2010) reported that essential oils extracted from T. vulgaris (0.5%) possessed great contact toxicity, which reduced the survival rate of B. tabaci biotype B by 73.4 per cent, 79.0 per cent and 58.2 per cent in the eggs, nymphs and pupal stages, respectively, compared to control.…”

Section: Contact Toxicity Of Thyme Oil To Life Stages Of a Rugiopercu...mentioning

confidence: 99%

Phytochemical profile and toxicity of thyme-derived (Thymus vulgaris) essential oil against the exotic rugose spiraling whitefly (Aleurodicus rugioperculatus Martin) infesting coconut

Saneera

Raguraman

Suganthi

et al. 2022

JPC

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Microwave-assisted heat extraction of thyme (Thymus vulgaris) yielded 1.64 per cent w/v of yellow to amber coloured and less viscous oil with a peculiar aroma. GC-MS analysis revealed the presence of 20 compounds, out of which thymol (51.94%), p-cymene (14.5%), γ-terpinene (10.09%), linalool (3.48%), and endo-borneol (3.95%) were the major compounds. Eggs, second instar nymphs and pupae of rugose spiraling whitefly (RSW) were subjected to contact toxicity assessment by complete immersion (dip method) in various concentrations of thyme oil. The results showed that essential oils at 0.35 per cent concentration exhibited 100 per cent mortality in the second instar nymphs. Thyme oil (0.5%) inhibited egg hatching and adult emergence to the tune of 100 per cent when the eggs and pupal stages were treated. Probit analysis indicated that the median lethal concentration (LC50) of thyme oil to eggs, second instar nymph sand pupal stages were 0.19, 0.13 and 0.21 per cent, respectively. Thyme oil proved to be an excellent toxicant to different developmental life stages of RSW; hence it can be successfully incorporated into the integrated pest management (IPM) programme for whitefly management in the coconut ecosystem.

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Section: Contact Toxicity Of Thyme Oil To Life Stages Of a Rugiopercu...mentioning

confidence: 99%