Efficacy of Essential Oils and Their Major Compounds against Meloidogyne graminicola (Rice Root-Knot Nematode) in Pots and Field Trials

Ajith, M; Pankaj,; Kaushik, Parshant; Shakil, Najam A.; Rana, Virendra Singh

doi:10.5958/0974-4444.2021.00016.0

Cited by 6 publications

(6 citation statements)

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“…Palmarosa oil, an essential oil extracted from the leaves and flowers of palmarosa grass, exhibited antifungal, nematocidal, and antioxidant properties [26][27][28]. In the present study, palmarosa oil displayed potent anthelmintic activity against G. kobayashii with a 24 h-EC 50 value of 4.98 mg/L, and the in vitro assays indicated that therapeutic baths with a high concentration of this EO could cause more than 90% mortality of these worms within 8 hours.…”

Section: Discussionsupporting

confidence: 55%

“…Similar results were reported by Nirmal et al [29], who have shown that exposure to palmarosa oil causes paralysis and death of earthworms (Pheretima posthuman) and the high content of geraniol in the EO might be responsible for its anthelmintic activity. The high mortality of the soil worm (Meloidogyne graminicola) was also observed after exposure to palmarosa oil, which might be due to the presence of geraniol [27]. In addition, geraniol is the main bioactive compound of palmarosa oil, occupying 67.6-83.6% of the oil composition [30].…”

Section: Discussionmentioning

confidence: 99%

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Anthelmintic Efficacy of Palmarosa Oil and Curcuma Oil against the Fish Ectoparasite Gyrodactylus kobayashii (monogenean)

Zhou

Yang

Dong

et al. 2022

Animals

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Monogeneans are a serious threat to the development of aquaculture due to the severe economic losses they cause. The prevention and treatment of this disease are increasingly difficult because of the environmental and health concerns caused by the use of chemical anthelmintics and the emergence of drug resistance. It is thus necessary to search for effective alternatives for the treatment of monogenean infections. In the current study, anthelmintic efficacy of 16 selected essential oils (EOs) was investigated using the goldfish (Carassius auratus)–Gyrodactylus kobayashii model. The screening experiment indicated that palmarosa oil and curcuma oil had satisfactory anthelmintic activity against G. kobayashii with EC100 values of 10 and 12 mg/L after 24-h exposure, respectively. The in vivo and in vitro assays indicated anthelmintic efficacy of palmarosa oil against G. kobayashii was in a time and dose-dependent manner. Interestingly, curcuma oil showed an anesthetic effect on G. kobayashii, and its anthelmintic activity was dose-dependent rather than time-dependent in the concentration range tested in this study. Additionally, the 24-h LC50 (50% lethal concentration) against goldfish of these two EOs was 8.19-fold and 5.54-fold higher than their corresponding EC50 (50% effective concentration) against G. kobayashii, respectively. Moreover, exposure to these two EOs at 100% effective concentration against G. kobayashii had no serious physiological and histopathological influence on goldfish. These results demonstrated a high safety for goldfish of these two EOs. Overall, palmarosa oil and curcuma oil could be potential candidates for the treatment of G. kobayashii infections in aquaculture.

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Section: Discussionsupporting

confidence: 55%

Section: Discussionmentioning

confidence: 99%

Anthelmintic Efficacy of Palmarosa Oil and Curcuma Oil against the Fish Ectoparasite Gyrodactylus kobayashii (monogenean)

Zhou

Yang

Dong

et al. 2022

Animals

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“…For citral, strong activities were previously mainly reported against M. incognita [50-52] and M. graminicola [53]. Both under in vitro and in vivo conditions, the activities obtained were sometimes comparable to commercial nematicides, such as carbofuran.…”

Section: Discussionmentioning

confidence: 63%

“…The phenylpropanoid eugenol also showed high activities against Meloidogyne spp. by inhibiting egg hatching and differentiation in M. javanica [62], by acting directly on the survival of M. incognita or M. graminicola, when applied as a component of Agastache rugosa or Syzygium aromaticum EOs, respectively [53,63], by reducing M. arenaria gall formation in tomato [64], or even by enhancing the activity of other EO compounds in a 1:1 synergistic interaction [65].…”

Section: Discussionmentioning

confidence: 99%

Essential Oil Volatiles as Sustainable Antagonists for the Root-Knot Nematode Meloidogyne ethiopica

et al. 2023

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Climate change is prompting a shift of tropical pests to locations with a previously lower probability of invasion. This is the case for root-knot nematodes, Meloidogyne sp., particularly of the tropical group. Among them, M. ethiopica is now considered a threat to European food security. The development of novel sustainable nematicides can be based on in vitro bioassays of highly active phytochemicals, e.g., volatiles from essential oils. However, a steady supply of nematodes is often very difficult and dependent on environmental conditions. In the present study, an in vitro co-culture system of M. ethiopica parasitizing hairy roots of Solanum lycopersicum was established, for the first time, to easily obtain populations of second-stage juveniles (J2). These were then used to screen the nematicidal activity of 10 volatile compounds characteristic of essential oils. Finally, information on the most successful compounds was reviewed to predict their environmental dispersion and ecotoxicological hazards. The M. ethiopica population obtained from the co-culture was morphologically similar to reported populations in natural conditions and could be accurately used in direct-contact bioassays. The aldehydes citral and citronellal induced complete mortality of the tested J2, at 1 mg/mL, while compounds from other chemical groups were not as successful. In comparison to commonly used commercial nematicides, citral and citronellal were less likely to accumulate in the water environmental compartment and have lower reported toxicities compared to aquatic organisms and to mammals. Overall, in vitro co-cultures showed the potential to expedite the screening and discovery of bioactive compounds as a contribution to the development of sustainable biopesticides, as well as to lower the impacts of modern farming on agroecosystems.

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“…Essential oils obtained from aromatic plants, which are abundant in compounds like terpenes and phenolics, have demonstrated effectiveness against various pests, including nematodes. These oils offer a promising and sustainable solution that aligns with the objectives of the European Green Deal [31,33,34].…”

Section: Discussionmentioning

confidence: 99%

Nematicidal trans-Anethole Blends Paralyzing Meloidogyne incognita

Kirgiafini,

Serafim,

Menkissoglu-Spiroudi

et al. 2024

Agriculture

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Nematodes have a negative impact on crop production and yield. The use of synthetic formulations to control plant parasitic nematodes carries both environmental and human health risks. As these agrochemicals are gradually being phased out, recent research has been focused on finding more environmentally friendly, plant-based alternatives. This study aims to investigate the effectiveness of botanicals, used alone or in artificial blends, in paralyzing Meloidogyne incognita second-stage juveniles (J2s) immersed in test solutions or exposed to vapors. We tested thymol, trans-anethole, and two lavender essential oils, referred to as LEOA and LEOB, which vary in their flower and stem compositions. We also employed in our study Melia azedarach aqueous extract (MWE), already proven to have considerable nematicidal activity. According to our findings, all treatments used individually exhibited considerable efficacy, even LEOA and LEOB first reported herein. In addition, all blends exhibited significant synergism, and the best-performing were trans-anethole/thymol, being synergic to paralyzing J2s for up to two days, and trans-anethole/LEOB as well as trans-anethole/MWE, provoking irreversible paralysis since the first day of J2 immersion in test solutions. Most importantly, the blend of trans-anethole with LEOA displayed the best effective synergism against M. incognita both for immersion and fumigation methods. Lastly, the chemical composition analysis displayed linalyl acetate and β-linalool as the major components of LEOA and β-linalool and eucalyptol as the major components of LEOB.

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Efficacy of Essential Oils and Their Major Compounds against Meloidogyne graminicola (Rice Root-Knot Nematode) in Pots and Field Trials

Cited by 6 publications

References 0 publications

Anthelmintic Efficacy of Palmarosa Oil and Curcuma Oil against the Fish Ectoparasite Gyrodactylus kobayashii (monogenean)

Anthelmintic Efficacy of Palmarosa Oil and Curcuma Oil against the Fish Ectoparasite Gyrodactylus kobayashii (monogenean)

Essential Oil Volatiles as Sustainable Antagonists for the Root-Knot Nematode Meloidogyne ethiopica

Nematicidal trans-Anethole Blends Paralyzing Meloidogyne incognita

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