Nematicidal Activity of Different Plants Extracts against Root Knot Nematodes

Afzal, Javeria; Abid, Muhammad; Hussain, Faisal; Abbas, Alia

doi:10.17582/journal.pjn/2021/39.1.1.7

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…Regarding nematicidal activity, the brown seaweed Padina concrescens showed the highest egg hatching inhibition of M. incognita (59%), followed by red seaweed Laurencia johnstonii (48%) and Sargassum horridum (43%). Previous experiments have shown that aqueous and methanolic extracts of brown and red seaweeds are more effective than those of green macroalgae on nematode egg hatching inhibition and nematicidal activity(Khan et al, 2015;Veronico & Melillo, 2021). Even though the seaweeds studied, in the investigation mentioned before, were collected in very different location compared to the seaweeds collected for this experiment, our results indicate the same tendency.…”

supporting

confidence: 71%

Evaluation of Baja Peninsula seaweeds against plant pathogens

González-Castro,

Rojas-Contreras,

Romero-Bastidas

et al. 2024

Preprint

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The widespread use of synthetic pesticides to control pests has generated serious consequences on the environment and human health. Currently, efforts focused on the search for new pesticides with less impact on the environment have been doubled. Marine algae synthesize compounds with activity against various agricultural pests (insects, nematodes, and fungi); however, marine pesticides are an underdeveloped alternative. This represents an opportunity to explore new sources of compounds. The objective of this work is to evaluate the antimicrobial, nematicidal and insecticidal activity of seaweed extracts against pathogens of agricultural importance. Therefore, seaweeds were collected from different locations at the Baja California peninsula, Mexico, and ethanolic extracts were obtained. The antibacterial and antifungal activity against five phytopathogenic strains and Fusarium oxysporum was evaluated by disc diffusion on agar. Nematicidal activity was assessed by egg hatching inhibition on Meloidogyne incognita and insecticidal activity against maize weevil Sitophilus zeamais. Regarding the antibacterial potential, Laurencia johnstonii, Asparagopsis taxiformis and Dictyota dichotoma showed higher inhibition against all the strains. Padina concrescens exhibited the highest percentage of egg hatching inhibition against M. incognita (59%) followed by L. johnstonii (48%). All the seaweeds cause mortality of S. zeamais. However, the highest insecticidal activity was found on L. johnstonii (71.9%). Red and brown seaweeds showed in general higher content of total phenolic compounds. Red and brown seaweed showed great potential for the control of phytopathogens through appropriate agricultural practices. However, further research is necessary to identify the active compounds.

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supporting

confidence: 71%

Evaluation of Baja Peninsula seaweeds against plant pathogens

González-Castro,

Rojas-Contreras,

Romero-Bastidas

et al. 2024

Preprint

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“…It has been reported that extracts of seaweed Ulva lactuca and Ulva fasciata were effective against a cotton pest Dysdercus cingulatus [4]. Also, extract of Sargassum tenerrimum and Padina tetrastromatica were found to be effective against root-knot nematode Meloidogyne javanica [29]. Neem is well known for its insecticidal properties, and it is very effective against a wide range of insect pests.…”

Section: Effects Of Botanicals On Weevil Mortalitymentioning

confidence: 99%

Efficacy of Eucheuma denticulatum Extract and Azadirachta indica Powder against Maize Weevil (Sitophilus zeamais) Infesting Stored Maize Grains

Peter,

Rashid,

Majaliwa

2024

Eur. J. Nutr. Food. Saf.

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Storage insect pests destroy food grains in storage. In the present study, the insecticidal activity of red seaweed extract (Eucheuma denticulatum) and neem (Azadirachta indica) was examined against maize weevils (Sitophilus zeamais) and the quality of the stored maize was assessed for a three months storage period. Three rates (0.0, 1.6 and 4.8% w/w) of neem powder and seaweed extract were used as treatments. The collected data were subjected to analysis of variance (ANOVA) using General Linear Model in SPSS computer software packages (version 25) and mean comparisons were conducted using Turkey’s (HSD) test at the 5% level of significance. Sitophilus zeamais, mortality, grain weight loss, and rate of germination were recorded for each treatment. The 4.8%w/w mixture of seaweed extract and neem seed powder was more toxic, followed by the mixture of the extract and neem leaf powder (84.5% and 73.3% mortality rates, respectively), while in the control, mortality was 20%. In all treatments, Sitophilus zeamais mortality increased with increasing doses. Grain weight loss was high in the control (5.6%), followed by grains treated with 1.6% extracts of Eucheuma denticulatum alone (2.8%). The percentage of damaged maize grains was high in the control (14%) and low in grains treated with 4.8% seaweed extract and neem leaf powder (3.3%). Percentage germination was high in grains treated with 4.8% and 1.6% seaweed extracts alone (96% and 87% respectively) and in control (91%). Additionally, sensory evaluation results in terms of color, odor and overall acceptability showed that maize grains treated with both botanicals could be accepted by the general public for consumption. The results indicate promising potential for seaweed extract and neem powder in controlling maize weevils, offering sustainable and environmentally friendly solutions for stored grain protection.

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