Potential of Citrus junos Fruit Waste From the Food Processing Industry for Weed Management

The allelopathic potential of Citrus junos Tanaka waste from food processing industry after juice extraction was investigated under laboratory conditions. C. junos waste powder inhibited the growth of roots and shoots of alfalfa (Medicago sativa L.), cress (Lepidium sativum L.), lettuce (Lactuca sativa L.), crabgrass (Digitaria sanguinalis L.), timothy (Phleum pratense L.) and ryegrass (Lolium multiflorum Lam.). Significant reductions in the growth of roots and shoots were observed as the powder concentration increased. The concentration of abscisic acid-β-d-glucopyranosyl ester (ABA-GE) in C. junos waste was determined to be 17.9 mg · kg–1 dry weight. Its concentration in C. junos waste appears to account mostly for the observed inhibition of tested plant seedlings. These results indicate that C. junos waste is allelopathic with potential for use in agriculture to suppress weed emergence, which should be investigated further in the field.

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Allelopathic potential of Citrus junos fruit waste from food processing industry

Bioresource Technology ◽

10.1016/j.biortech.2003.12.007 ◽

2004 ◽

Vol 94 (2) ◽

pp. 211-214 ◽

Cited By ~ 10

Author(s):

Hisashi Kato-Noguchi ◽

Yukitoshi Tanaka

Keyword(s):

Food Processing ◽

Food Processing Industry ◽

Processing Industry ◽

Allelopathic Potential ◽

Citrus Junos ◽

Fruit Waste

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Phytotoxic effects of Cerbera manghas L. leaf extracts on seedling elongation of four monocot and four dicot test species

Acta Agrobotanica ◽

10.5586/aa.1720 ◽

2017 ◽

Vol 70 (3) ◽

Cited By ~ 3

Author(s):

Ichsan Nurul Bari ◽

Hisashi Kato-Noguchi

Keyword(s):

Weed Management ◽

Dry Weight ◽

Phleum Pratense ◽

Italian Ryegrass ◽

Lepidium Sativum ◽

Leaf Extracts ◽

Isolation And Identification ◽

Test Species ◽

Phytotoxic Effects ◽

Cerbera Manghas

Exploration of allelochemicals with phytotoxic effects is intended to minimize a current dependency on synthetic herbicides in weed management. Several allelochemicals from the tropical tree Cerbera manghas (sea mango) have been reported as termiticides and bactericides. The present study investigated possible phytotoxic effects of C. manghas leaf extracts under laboratory conditions. Four monocots: barnyard grass (Echinochloa crus-galli), foxtail fescue (Vulpia myuros), Italian ryegrass (Lolium multiflorum), and timothy (Phleum pratense) and four dicots: alfalfa (Medicago sativa), garden cress (Lepidium sativum), lettuce (Lactuca sativa), and rapeseed (Brassica napus) were used as test species. Elongation of both shoots and roots of seedlings was measured to assess any phytotoxic effects. The results showed that the sensitivities of shoots and roots were different between the test species, and the inhibition of seedling elongation significantly increased with increasing concentration of leaf extracts of C. manghas for all the test species. The IC50 (50% inhibitory concentration) values showed that 8.50–32.30 and 4.26–34.67 mg dry weight equivalent extract mL−1 of C. manghas inhibited seedling elongation by 50%, for shoots and roots respectively. Isolation and identification of the phytotoxic substances from C. manghas are suggested for future investigation.

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