Evaluation of the toxicity of 17 essential oils against Choristoneura rosaceana (Lepidoptera: Tortricidae) and Trichoplusia ni (Lepidoptera: Noctuidae)

Cristina M. Machial, Ikkei Shikano, Michael Smirle, Roderick Bradbury, Murray B. Isman

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

BACKGROUND: The obliquebanded leafroller, Choristoneura rosaceana Harris, and the cabbage looper, Trichoplusia ni Ḧ ubner, are serious fruit and vegetable pests requiring multiple insecticide applications per year. To reduce non-target exposure to hazardous insecticides and to curb resistance development, alternative controls are required. Accordingly, a selection of 17 essential oils was screened against both lepidopteran pests, and the influence of azinphos-methyl resistance on essential oil toxicity to C. rosaceana was studied. RESULTS: Of the 17 essential oils screened, patchouli oil (Pogostemon cablin Benth.) and thyme oil (Thymus vulgaris L.) were selected for further testing against C. rosaceana, whereas patchouli oil, garlic oil (Allium sativum L.) and lemongrass oil (Cymopogon nardus L.) were selected for further testing against T. ni. LC50 and LD50 values confirmed that patchouli oil was the most toxic to C. rosaceana larvae, with LC50 = 2.8 μLmL-1 and LD50 = 8.0 μg insect-1. Garlic oil was the most toxic oil to T. ni larvae with LC50 = 3.3 μLmL-1 and LD50 = 22.7 μg insect-1, followed by patchouli oil and lemongrass oil. Azinphos-methyl-resistant leafrollers were 1.5-fold more tolerant to patchouli oil and 2.0-foldmore tolerant to thyme oil. CONCLUSIONS: Based on these results, patchouli oil and other essential oils have sufficient efficacy to be considered as components of an essential oil-based insecticide that targets these lepidopteran pests.

Original languageEnglish (US)
Pages (from-to)1116-1121
Number of pages6
JournalPest Management Science
Volume66
Issue number10
DOIs
StatePublished - Oct 1 2010

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Trichoplusia
Choristoneura rosaceana
Tortricidae
Noctuidae
essential oils
Pogostemon cablin
Lepidoptera
toxicity
oils
lethal dose 50
lethal concentration 50
azinphos-methyl
Cymbopogon
thyme
pests
garlic
insecticides
Nardus
leafrollers
Thymus vulgaris

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Insect Science

Cite this

Machial, Cristina M. ; Shikano, Ikkei ; Smirle, Michael ; Bradbury, Roderick ; Isman, Murray B. / Evaluation of the toxicity of 17 essential oils against Choristoneura rosaceana (Lepidoptera : Tortricidae) and Trichoplusia ni (Lepidoptera: Noctuidae). In: Pest Management Science. 2010 ; Vol. 66, No. 10. pp. 1116-1121.
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abstract = "BACKGROUND: The obliquebanded leafroller, Choristoneura rosaceana Harris, and the cabbage looper, Trichoplusia ni Ḧ ubner, are serious fruit and vegetable pests requiring multiple insecticide applications per year. To reduce non-target exposure to hazardous insecticides and to curb resistance development, alternative controls are required. Accordingly, a selection of 17 essential oils was screened against both lepidopteran pests, and the influence of azinphos-methyl resistance on essential oil toxicity to C. rosaceana was studied. RESULTS: Of the 17 essential oils screened, patchouli oil (Pogostemon cablin Benth.) and thyme oil (Thymus vulgaris L.) were selected for further testing against C. rosaceana, whereas patchouli oil, garlic oil (Allium sativum L.) and lemongrass oil (Cymopogon nardus L.) were selected for further testing against T. ni. LC50 and LD50 values confirmed that patchouli oil was the most toxic to C. rosaceana larvae, with LC50 = 2.8 μLmL-1 and LD50 = 8.0 μg insect-1. Garlic oil was the most toxic oil to T. ni larvae with LC50 = 3.3 μLmL-1 and LD50 = 22.7 μg insect-1, followed by patchouli oil and lemongrass oil. Azinphos-methyl-resistant leafrollers were 1.5-fold more tolerant to patchouli oil and 2.0-foldmore tolerant to thyme oil. CONCLUSIONS: Based on these results, patchouli oil and other essential oils have sufficient efficacy to be considered as components of an essential oil-based insecticide that targets these lepidopteran pests.",
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Evaluation of the toxicity of 17 essential oils against Choristoneura rosaceana (Lepidoptera : Tortricidae) and Trichoplusia ni (Lepidoptera: Noctuidae). / Machial, Cristina M.; Shikano, Ikkei; Smirle, Michael; Bradbury, Roderick; Isman, Murray B.

In: Pest Management Science, Vol. 66, No. 10, 01.10.2010, p. 1116-1121.

Research output: Contribution to journalArticle

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T1 - Evaluation of the toxicity of 17 essential oils against Choristoneura rosaceana (Lepidoptera

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AU - Machial, Cristina M.

AU - Shikano, Ikkei

AU - Smirle, Michael

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AU - Isman, Murray B.

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N2 - BACKGROUND: The obliquebanded leafroller, Choristoneura rosaceana Harris, and the cabbage looper, Trichoplusia ni Ḧ ubner, are serious fruit and vegetable pests requiring multiple insecticide applications per year. To reduce non-target exposure to hazardous insecticides and to curb resistance development, alternative controls are required. Accordingly, a selection of 17 essential oils was screened against both lepidopteran pests, and the influence of azinphos-methyl resistance on essential oil toxicity to C. rosaceana was studied. RESULTS: Of the 17 essential oils screened, patchouli oil (Pogostemon cablin Benth.) and thyme oil (Thymus vulgaris L.) were selected for further testing against C. rosaceana, whereas patchouli oil, garlic oil (Allium sativum L.) and lemongrass oil (Cymopogon nardus L.) were selected for further testing against T. ni. LC50 and LD50 values confirmed that patchouli oil was the most toxic to C. rosaceana larvae, with LC50 = 2.8 μLmL-1 and LD50 = 8.0 μg insect-1. Garlic oil was the most toxic oil to T. ni larvae with LC50 = 3.3 μLmL-1 and LD50 = 22.7 μg insect-1, followed by patchouli oil and lemongrass oil. Azinphos-methyl-resistant leafrollers were 1.5-fold more tolerant to patchouli oil and 2.0-foldmore tolerant to thyme oil. CONCLUSIONS: Based on these results, patchouli oil and other essential oils have sufficient efficacy to be considered as components of an essential oil-based insecticide that targets these lepidopteran pests.

AB - BACKGROUND: The obliquebanded leafroller, Choristoneura rosaceana Harris, and the cabbage looper, Trichoplusia ni Ḧ ubner, are serious fruit and vegetable pests requiring multiple insecticide applications per year. To reduce non-target exposure to hazardous insecticides and to curb resistance development, alternative controls are required. Accordingly, a selection of 17 essential oils was screened against both lepidopteran pests, and the influence of azinphos-methyl resistance on essential oil toxicity to C. rosaceana was studied. RESULTS: Of the 17 essential oils screened, patchouli oil (Pogostemon cablin Benth.) and thyme oil (Thymus vulgaris L.) were selected for further testing against C. rosaceana, whereas patchouli oil, garlic oil (Allium sativum L.) and lemongrass oil (Cymopogon nardus L.) were selected for further testing against T. ni. LC50 and LD50 values confirmed that patchouli oil was the most toxic to C. rosaceana larvae, with LC50 = 2.8 μLmL-1 and LD50 = 8.0 μg insect-1. Garlic oil was the most toxic oil to T. ni larvae with LC50 = 3.3 μLmL-1 and LD50 = 22.7 μg insect-1, followed by patchouli oil and lemongrass oil. Azinphos-methyl-resistant leafrollers were 1.5-fold more tolerant to patchouli oil and 2.0-foldmore tolerant to thyme oil. CONCLUSIONS: Based on these results, patchouli oil and other essential oils have sufficient efficacy to be considered as components of an essential oil-based insecticide that targets these lepidopteran pests.

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