Bioactivity of Plant Essential Oil against Potato Tuber Moth,Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae) (original) (raw)
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Journal of Crop Protection, 2013
The potato tuber moth (PTM), Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae), is an important pest of potato and other solanaceous plants. It is cosmopolite and oligophage that exists in most countries where potatoes are grown. Because of chemical treatment adverse effects, there is a necessity to find safe alternatives to synthetic insecticides. So, medicinal plants are promising since they are safe, inexpensive and effective. In this direction, potato tubers were dipped in 1 ml of 5% methanolic extracts of fumitory, licorice, lavender and oregano. The percentage of first larval penetration to tubers and oviposition-preference of mentioned medicinal plants was investigated on PTM. Subsequently, fumigant toxicity of essential oils of basil, european pennyroyal, lavender, mint and savory were investigated on P. operculella. Treated potato tubers by methanolic extract of lavender elicited the lowest percentage (19.3) of first larval penetration. Studying of oviposition-prefe...
2014
For protecting potato tubers from the potato tuber moth (PTM) infestation during storage, different concentrations of ten natural plant oils and three commercial monoterpnes were tested, some as fumigants or dusts against adults or dusts against neonate larvae, while others as sprays on the gunny sacks in which potato tubers were stored. Tuber damage indices as well as persistence indices for tested materials were assessed. Vapors of Cymbopogon citratus, Myristica fragrans (nutmag), Mentha citrata and a-Ionone (monoterpene) caused a highly significant reductions in the life span of exposed moths as well as in new adult offsprings. Other tested oils as Cinnamonium zeylanicum, Myristica. fragrans (Mace) and Pelargonium graveolens caused a insignificant effect. There was no significant effect of the tested vapors on egg hatchability, except in case of oils of C. citratus , M. fragrans (nutmag) and M. tragrans (Mace oil) which caused high reduction in egg hatchability. According to the ...
Herba Polonica, 2016
SummaryIntroduction:The potato tuber moth (PTM) is the major economic pest of potato. Different approaches were tried to prevent and control this pest including natural pesticides and synthetic fumigants.Objectives: This study was conducted to evaluate the insecticidal activity of the essential oils of thyme and myrtle. In addition to evaluating the insecticidal activity of carvacrol and eucalyptol against the different life stages of potato tuber moth using a fumigation bioassays.Methods:Thyme and myrtle oils were extracted from wildThymus syriacusBoiss. and wildMyrtus communisL. by hydrodistillation. Fumigation experiments were conducted on potato tuber moth of different stages of development (eggs, larvae, pupae, and adults), using standard methods. The potato tuber moth was treated for different periods using different concentrations of the essential oils. One-way analysis of variance (ANOVA) was applied on the mortality percentages data to estimate the significance of differenc...
For protecting potato tubers from the potato tuber moth (PTM) infestation during storage, different concentrations of ten natural plant oils and three commercial monoterpnes were tested, some as fumigants or dusts against adults or dusts against neonate larvae, while others as sprays on the gunny sacks in which potato tubers were stored. Tuber damage indices as well as persistence indices for tested materials were assessed. Vapors of Cymbopogon citratus, Myristica fragrans (nutmag), Mentha citrata and a-Ionone (monoterpene) caused a highly significant reductions in the life span of exposed moths as well as in new adult offsprings. Other tested oils as Cinnamonium zeylanicum, Myristica. fragrans (Mace) and Pelargonium graveolens caused a insignificant effect. There was no significant effect of the tested vapors on egg hatchability, except in case of oils of C. citratus, M. fragrans (nutmag) and M. tragrans(Mace oil) which caused high reduction in egg hatchability. According to the values of damage indices, the most effective oil vapors were arranged ascendingly as follows: Myristica (nutmag) < Cymbopogon < Mentha < a-Ionone. Dusting potato tubers with 1% conc., (mixed with talcum powder) of Myristica, Mentha, Cymbopogons oils and a-Ionone (monoterpene) caused high reduction in egg deposition, adult emergence as well as percentage of penetrated larvae of PTM. According to their damage indices, Cymbopogon and ά-Ionone were the most protective oils, followed by Myristica and Mentha. Spraying gunnysacks with 1% conc., of the aforementioned natural oils separately elicited high reduction in PTM progeny; while their combinations did not elicit any significant synergistic effect. According to their tuber damage indices, it was found that Cymbopogon oil alone or mixed with Myristica oil showed the best protective effect, followed by Myristica oil alone and Mentha oil mixed with Cymbopogon oil. Assessment of the persistence index of various tested materials during storage indicated that: Vapors of Cymbopogon and Myristica (nutmag) gave the best protection from PTM infestation during storage (for 20 days). Dusting potato tubers with plant oil of Cymbopogon (mixed with talcum powder) gave the best protection during storage (for 15 days). Spraying gunnysacks with natural plant oils of Cymbopogon and Myristica, separately or mixed elicited the best protection from infestation by PTM during storage up to 20 days.
Egyptian Journal of Biological Pest Control, 2020
The potato tuber moth (PTM), Phthorimaea operculella (Zeller 1873) (Lepidoptera: Gelechiidae), is a destructive pest of stored potatoes and potato crop. Biopesticides are certain types of pesticides derived from animals, plants, and bacteria. Botanicals are especially efficient in the form of antifeedant, repellent, protectants, and growth-disrupting hormones. They are also sources of secondary metabolites that are safer than synthetic insecticides. Present research was conducted to evaluate some botanical extracts as natural local alternatives against PTM under storage conditions. Twelve different 80% ethanolic plant extracts were tested on PTM during storage condition (30 ± 2°C and 70 ± 5% RH) at a light regime of the day 10-h light and 14-h dark. Biological parameters of the pest, evidence of the potato tubers damage, and continuation of protection to the tubers were recorded. Extracts of mint, zygophyllum, coriander, arnoglosse, harmel, and solanum indicated a total inhibition o...
Saudi Journal of Biological …, 2009
The olfactory reaction of larvae and moths was investigated towards 18 oils (6 natural oils and 12 commercial chemical oils). Some of these oils such as peppermint and camphor (natural oils) and eugenol and camphene (commercial oils) were repellent to both larvae and moths. Other oils such as strawberry and D-limonene were attractive to both larvae and moths. Some of the repellent oils were, therefore, tested for their effect on certain biological aspects of the insects. Eugenol and peppermint oils, each at the 0.01% conc., caused a significant depression in the fecundity of moth and decreased the percentage of egg hatchability. Eugenol oil was much more effective than peppermint oil at 1%. Dried (leaves, fruits or seeds) powder of 14 different plants species were tested in different concentrations with talcum powder (carrier material) against egg deposition. The results indicated that dried powders of Allium cepa, Curcuma longa, Colocasia antiqurum, Ocimum basilicum. Dodonaea viscose and Thuja orientalis played a highly significant role in reducing egg deposition. The most impressive effect was displayed by powders of D. viscose and A. cepa, which caused the highest depression in egg deposition as well as in the emerging offsprings. Ethanolic extracts of 11 plants indicated that extracts of Pithuranthos tortosus and Iphiona scabra caused the maximum inhibition of egg hatchability, followed by C. longa, Citrullus colocynthia and T. orientalis. Ethanolic extracts of Schinus terebenthiflius (leaves) and I. scabra caused the highest depression in the deposited eggs, as they played a remarkable role as ovipositor deterrents. The majority of the plant extracts at 1% conc. could protect potato tubers at different intervals according to the calculated tuber damage index as follows: Iphiopna > Pithuranthos > Curcuma > Schinus (fruits) Thuja > Schinus (leaves) > Dodonaea > Citrullus.
Archives Of Phytopathology And Plant Protection, 2013
The potato tuber moth (PTM), Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae), is an important pest of potato and other solanaceous plants. It is cosmopolite and oligophage that exist in most countries where potatoes are grown. Because of chemical treatment adverse effects, there is a necessity to find safe alternatives to synthetic insecticides. So, medicinal plants are promising since they are safe, inexpensive and effective. In this direction, potato tubers were dipped in 1 ml of 5% methanolic extracts of fumitory, licorice, lavender and oregano. The percentage of first larval penetration to tubers and oviposition-preference of mentioned medicinal plants was investigated on PTM. Subsequently, fumigant toxicity of essential oils of basil, european pennyroyal, lavender, mint and savory were investigated on P. operculella. Treated potato tubers by methanolic extract of lavender elicited the lowest percentage (19.3) of first larval penetration. Studying of oviposition-preference demonstrated that the most number of eggs were laid on control and fumitory with 28 and 10 eggs after three days, respectively. Probit analysis of essential oils showed that the most effective oil was savory which exhibited LC 50 value on adults of PTM equivalent to 0.048 µL/L air.
Journal of Food Science and Engineering
Potato tuber moth [Phthorimae operculella Zeller (Lep.: Gelechiidae)] is the most important insect causing damage of potatoes. It also causes significant damage to tomato and eggplant. The application of plant extracts to control insects is an effective alternative. In this study, the efficacy of extracts from Leptospermum petersonii Bailey (Myrtaceae), Achillea wilhelmsii C. Koch (Asteraceae) and Tanacetum parthenium L. (Asteraceae) on potato tuber moth using two different methods was investigated. Bioassays were used to determine the effect of varying concentrations (for L. petersonii 0.05%, 0.1%, 0.3% and 0.4%, for A. wilhelmsii and T. parthenium 1%, 3%, 6% and 12%) of extracts. Experiments were carried out using potato tuber of Solanum tuberosum L. Fourth instar larva of about were used in tuber dipping and larvae dipping methods. In tuber dipping method, the highest mortality (100%) occurred at concentration of 0.4% while the smallest mortality was at 0.05% the extracts of L. petersonii. It was determined that the extract of A. wilhelmsii and T. parthenium had the highest mortality at the highest concentration 85% and 90% respectively. In larva dipping method, the extracts of L. petersonii. A. wilhelmsii and T. parthenium showed the highest mortality at the highest concentrations 100%, 82% and 87% respectively. The research was undertaken under laboratory conditions at the Plant Protection Central Research Institute.
Plants as Bio-Insecticides in the Service of the Suppression of Potato Tuber Moth in Storage
2016
Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae), is economically very important pest of potato and other solanaceous plants in the field and warehouse. Frequent and excessive use of insecticides leads to development of insects resistance, environmental pollution, and lives residues in food. All this implicated as a obligatory applications of botanical insecticides. Research in this area is increasingly attracting attention as the kingdom of plants is an inexhaustible source of active ingredients with insecticidal properties. This is the only way in the registration and appropriate use of eco-friendly active ingredients as pesticides
Plants
Neem and karanja oil are the most promising botanical insecticides in crop protection nowadays. Given that information about the insecticidal abilities of these oils is lacking, the aim was to explore the effects of neem and karanja oil binary mixtures. The insecticidal activity of NeemAzal T/S (Trifolio-M GmbH, Lahnau, Germany) (neem oil), Rock Effect (Agro CS a.s., Česká Skalice, Czech Republic) (karanja oil), and their binary mixes (at 1:1, 1:2, and 2:1 volume ratios) against the larvae of the Colorado potato beetle (CPB; Leptinotarsa decemlineata) was studied. In our bioassays, a synergistic effect of the mixtures, which was dose-dependent, was observed for the first time against this pest. The most effective blend was the 1:1 ratio. Its efficacy was more or less the same as, or even greater than, the neem oil alone. The LC50 of neem oil two days after application was (0.075 g·L−1) and the LC50 of the mixture was (0.065 g·L−1). The LC50 of karanja oil was (0.582 g·L−1), which wa...