Bioefficacy of certain plant extracts against the red spider mite,<i>Oligonychus coffeae</i>(Nietner) (Acarina: Tetranychidae) infesting tea in Tamil Nadu, India

Roobakkumar, Amsalingam; Subramaniam, M. S. R.; Babu, Azariah; Muraleedharan, N.

doi:10.1080/01647951003652592

Cited by 42 publications

(22 citation statements)

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“…Corrected per cent egg mortality = [(S -K)/(100 -K)] × 100, where S is the per cent mortality of the treated group and K the per cent mortality of the control group. The discrimination quotient (DQ) was calculated using the following formula (after Roobakkumar et al 2010…”

Section: Discussionmentioning

confidence: 99%

“…A culture of red spider mite was maintained in the laboratory following the detached leaf culture method of Helle and Sabelis (1985) and Roobakkumar et al (2010) with slight modifications. From the stock, adult mites were transferred onto fresh tea leaves (6 cm 2 ) placed on moistened cotton pads (∼1.5 cm thick) in plastic trays (42 cm × 30 cm × 6.5 cm).…”

Section: Maintenance Of O Coffeaementioning

confidence: 99%

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Bioefficacy assessment ofMelia azedarach(L.) seed extract on tea red spider mite,Oligonychus coffeae(Nietner) (Acari: Tetranychidae)

Roy

Mukhopadhyay

2012

International Journal of Acarology

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Aqueous seed extract of Melia azedarach (L.) was evaluated against tea red spider mite, Oligonychus coffeae (Nietner), in relation to mortality of adult mites, viability of eggs and subsequent adult emergence and oviposition deterrence in the laboratory, and the extract underwent field evaluation in terms of per cent reduction of the mite population. Direct spray methods were used in the laboratory with concentrations of 1%, 2%, 4%, 6%, 8% and 10%. Mortality of O. coffeae was dependent on both concentration and time (56.4% mortality on the first day; 95.6% mortality by the seventh day). The viability of eggs was reduced significantly compared with untreated mite's eggs. Significant reduction in adult emergence and increased duration of total developmental period were noted. Deposition of eggs by adult mites on treated leaf surface was decreased significantly compared with the control. No phytotoxic effect (score 0-5% and grade 1) was observed in the field when tea bushes were sprayed with different doses of aqueous seed extract of M. azedarach. The made tea samples were taint free. An organoleptic test scored both leaf infusions and liquor strength as good, scoring 6.5-7.0 on a 10-point scale. The availability and distribution of this plant (M. azedarach) in and around the tea-growing areas of the sub-Himalayan region, along with its processing for economic utility and inclusion in the current integrated pest management program, is discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Maintenance Of O Coffeaementioning

confidence: 99%

Bioefficacy assessment ofMelia azedarach(L.) seed extract on tea red spider mite,Oligonychus coffeae(Nietner) (Acari: Tetranychidae)

Roy

Mukhopadhyay

2012

International Journal of Acarology

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“…In our present study, the bioefficacy of aqueous extracts of ferns on their acaricidal and insecticidal property was clearly proved for the first time against O. coffeae. In earlier studies on using botanicals against RSM, Roobakkumar et al (2010) observed 100% mortality at 96 h after the spray of Pongam oil at a 5% concentration; the aqueous leaf extracts of morinda tinctoria (Roxb) and Pongamia glabra (Vent) (Vasanthakumar et al 2013) and dry pericarp of the fruits of Terminalia chebula (Roy et al 2014) caused ovipositional deterrence and 100% adult mortality at a similar concentration. The acaricidal effect of ferns observed in the present study was similar to those reports.…”

Section: Discussionmentioning

confidence: 99%

“…Despite increasing reports on the evaluation of medicinal plants in crop protection, only few are getting formulated and evaluated in laboratory, greenhouse, and field conditions and get approval for recommendation in plantation. Many plant products and their components of angiosperms are evaluated from time to time against various tea pests and diseases (Roobakkumar et al 2010;Roy & Mukhopadhyaya 2012;Vasanthakumar et al 2013). As a new approach, ferns were selected for study.…”

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confidence: 99%

Efficacy of certain common ferns against red spider mite Oligonychus coffeae and tea mosquito bug Helopeltis theivora infesting tea

Prabhakaran¹,

Radhakrishnan²,

Srikumar³

et al. 2017

Plant Prot. Sci.

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Prabhakaran P., Radhakrishnan B., Srikumar K.K., Suresh Kumar B. (2017): Efficacy of certain common ferns against red spider mite Oligonychus coffeae and tea mosquito bug Helopeltis theivora infesting tea. Plant Protect Sci., 53: 232-242.In search for botanicals as an alternative remedy to synthetic chemicals in the pest control of tea plantations, ferns such as adiantum raddianum, asplenium aethiopicum, Cyclosorus interruptus, dicranopteris linearis, diplazium polypodioides, and Pteridium aquilinum were evaluated against the two major pests of tea, red spider mite Oligonychus coffeae Nietner and tea mosquito bug Helopeltis theivora Waterhouse, which are the foremost seasonal pests in tea fields, causing severe crop loss. Apart from synthetic chemicals, only the neem kernel extract is recommended in tea fields. The aqueous extracts of ferns were screened at different concentrations against these pests under laboratory and field conditions. The extracts of P. aquilinum and d. linearis showed good contact toxicity at a 5% concentration to O. coffeae. The acaricidal activity was observed in the order P. aquilinum > d. linearis > C. interruptus > a. raddianum > d. polypodioides > a. aethiopicum. Under field conditions, the extract of d. linearis and P. aquilinum showed a 50% reduction in the population of red spider mite and caused no phytotoxic effect to tea leaves. But their insecticidal activity was less pronounced against H. theivora. They exhibit antifeedant activity, which was sustained only for 24 hours. The photochemical screening of extracts showed a qualitatively increased level of saponins in P. aquilinum, d. linearis, and C. interruptus. The study shows that the aqueous extracts of d. linearis and P. aquilinum can be incorporated in the mite control programme in tea.Keywords: botanicals; aqueous extracts; acaricidal activity; insecticidal activity Tea occupies a major position among various plantation crops. It is grown in 50 different countries and the prime producers are India,

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“…The discrimination quotient (DQ) was calculated using the following formula (after Roobakkumar et al, 2010;Roy and Mukhopadhyay, 2012): DQ=[(C-T)/ (C+T)] where C=number of eggs on control surface of the leaves; T=number of eggs on treated surface of the leaves.…”

Section: Bioassay On Repellency and Ovipositional Deterrencymentioning

confidence: 99%

Evaluation of petroleum based horticulture oil for the management of the tea red spider mite, Oligonychus coffeae Neitner (Acarina: Tetranychidae)

Roy¹,

Rahman²,

Barua³

et al. 2015

Acta Phytopathologica et Entomologica Hungarica

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The Servo agro spray oil (petroleum based horticulture oil) was evaluated in the laboratory against tea red spider mite, Oligonychus coffeae to determine its effect on adult mortality, viability of eggs, oviposition deterrence and repellent properties. The same was also evaluated in the field to determine its effect on mite population. Direct spray method was used in the laboratory at concentrations of 0.5, 1.0, and 1.5%. Mortality of O. coffeae was both concentration and time dependent. Deposition of eggs by adult mites on treated leaf surfaces decreased significantly and the viability of eggs was also significantly reduced. In addition, different concentrations of the Servo agro spray also exhibited repellent properties against adult mites. In the field Servo agro spray oil significantly reduced the mite population and its bio-efficacy was comparable to that of the synthetic pesticide (propargite 57 EC). No phytotoxic effect was observed when tea bushes were sprayed with different doses of Servo agro spray. Tea samples were taint free. Quality (appearance of liquor, flavour, taint and taste) of made tea was not adversely affected by treatments with Servo agro spray oil. Therefore Servo agro spray oil may be a potential agent to be used in the sustainable management of tea red spider mite.

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Bioefficacy of certain plant extracts against the red spider mite,Oligonychus coffeae(Nietner) (Acarina: Tetranychidae) infesting tea in Tamil Nadu, India

Cited by 42 publications

References 2 publications

Bioefficacy assessment ofMelia azedarach(L.) seed extract on tea red spider mite,Oligonychus coffeae(Nietner) (Acari: Tetranychidae)

Bioefficacy assessment ofMelia azedarach(L.) seed extract on tea red spider mite,Oligonychus coffeae(Nietner) (Acari: Tetranychidae)

Efficacy of certain common ferns against red spider mite Oligonychus coffeae and tea mosquito bug Helopeltis theivora infesting tea

Evaluation of petroleum based horticulture oil for the management of the tea red spider mite, Oligonychus coffeae Neitner (Acarina: Tetranychidae)

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