Claim · model-written summary
The median lethal dose of manuka essential oil against C. includens larvae was 42 ug/larva.
Chrysodeixis includensVerbatim
e0“The median lethal dose (LD 50 ) values (μg/larva) for manuka essential oil, fraction 2, leptospermone, isoleptospermone, flavesone, and grandiflorone against T. ni were 50, 25, 20, 20, 45 and 18, respectively and 42, 32, 28, 20, 41, and 14, respectively against C. includens”
Title
Insecticidal activity of manuka essential oil triketones against two major lepidopteran pests
Ephantus J Muturi; Mathew A Neidmann; Victor P Ribeiro; et al. Pest Management Science 2026. doi:10.1002/ps.70493
Other claims from this paper (19)
- Intervention effect Manuka essential oil and one of its four fractions (fraction 2) were toxic to the two lepidopteran pests.
- Intervention effect Fraction 2 was more toxic than the whole manuka essential oil.
- Observation Gas chromatography-mass spectrometry showed leptospermone, isoleptospermone and flavesone to be the major components of manuka fraction 2.
- Intervention effect Flavesone and manuka essential oil had similar toxicity to both caterpillar species.
- Intervention effect Leptospermone, isoleptospermone and grandiflorone were more toxic to both caterpillar species than the whole essential oil.
- Observation The median lethal dose of manuka essential oil against T. ni larvae was 50 ug/larva.
- Observation The median lethal dose of fraction 2 against T. ni larvae was 25 ug/larva.
- Observation The median lethal dose of leptospermone against T. ni larvae was 20 ug/larva.
- Observation The median lethal dose of isoleptospermone against T. ni larvae was 20 ug/larva.
- Observation The median lethal dose of flavesone against T. ni larvae was 45 ug/larva.
- Observation The median lethal dose of grandiflorone against T. ni larvae was 18 ug/larva.
- Observation The median lethal dose of fraction 2 against C. includens larvae was 32 ug/larva.
- Observation The median lethal dose of leptospermone against C. includens larvae was 28 ug/larva.
- Observation The median lethal dose of isoleptospermone against C. includens larvae was 20 ug/larva.
- Observation The median lethal dose of flavesone against C. includens larvae was 41 ug/larva.
- Observation The median lethal dose of grandiflorone against C. includens larvae was 14 ug/larva.
- Intervention effect Manuka essential oil and its constituents were phytotoxic to cabbage, soybean and corn.
- Observation Cabbage and corn were the most and the least affected plants by manuka essential oil and its constituents, respectively.
- Recommendation The authors conclude manuka essential oil and its components are promising biopesticides, but improved delivery systems are needed to reduce phytotoxicity.