Abstract:In this study, chemical compositions of the volatile oil extracted from Eucalyptus camaldulensis Dehnh. were analyzed by using GC and GC-MS. The oxygenated sesquiterpenes, monoterpene hydrocarbons, sesquiterpene hydrocarbons and oxygenated monoterpenes compositions were detected in the sample studied. Pesticidal effects of this oil were investigated on storage insect pests like Rhizopertha dominica F. . The essential oil was tested on some fungal pathogens and weeds. As fungal pathogens, Verticillium dahliae Kleb, Fusarium oxyporum Schl., Phytium debaryanum Auct. non R. Hesse, Sclerotinia sclerotiorum (Lib.) de Barry and Rhizoctania solani Kühn. were used while tests on the weeds were performed on Convolvulus arvensis L., Melilotus officinalis L. and Amaranthus retroflexus L. in invitro conditions. E. camaldulensis essential oil was found to be effective at 10 and 20 µL against all the tested insect pests. Our results also showed that growth of fungal mycelial as well as weed stems and roots were significantly affected by essential oil. In 10 and 20 µL, V. dahliae, P. debaryanum, F. oxyporum and S. sclerotiorum mycelial growth were inhibited in 7 days, while no effect was observed on R. solani mycelial growth in this duration. On the other hand, the applications of the oil to the weeds showed different results for each species examined. Although at 5, 10 and 20 µL concentrations of E. camaldulensis essential oil did not affect the root and stem growth of C. arvensis, the stem and root growth of M. officinalis and A. retroflexus were reduced by the tested essential oil at the same concentration and time. The research results suggest that E. camaldulensis essential oil might have potential to be used as a natural pesticide as well as fungicide.
In this study, chemical compositions of essential oil extracted from Cuminum cyminum L., Mentha longifolia L. and Allium sativum L. were analysed using GC and GC-MS methods. The herbicidal effects of the essential oils on seed germination, root and shoot growth of Rumex crispus L. and Convolvulus arvensis L. were investigated. Meanwhile their effects regarding the mycelial development in Verticilium dahlia Kleb. and Fusarium oxysporum Schl. were also evaluated. Only the highest three concentrations; 10, 15, 20 μg/cm 2 of A. sativum L. were 100% inhibited the seed germination, root and shoot growth of R. crispus L.; C. cyminum L. and M. longifolia L were affected at a rate of 100% by the four concentrations. All the three essential oils showed significant effect (100%) in the parameters examined against C. arvensis L. The essential oils obtained from C. cyminum L., M. longifolia L. and A. sativum L. were found to be 100% effective on V. dahlia Kleb. mycelium growth in all concentrations examined. However, C. cyminum L. and M. longifolia L. essential oils were found to be 30.0-36.6% effective at the concentration of 5 μg/cm 2 on mycelium development of F. oxysporum Schl.; and the other 3 concentrations totally inhibited the growth of the fungi. The essential oil of A. sativum L. was the most effective; and 100% inhibition of the mycelial growth of F. oxysporum was detected in all concentrations. The oils used in the study have the potential of being used as herbicides and fungicides.
Abstract:In this study, leaf proportional water content, chlorophyll a and b, total chlorophyll, carotenoid, proline, total amino acid, ascorbic acid, glucose, fructose and sulphydryl group (SH) were determined in both Viscum album ssp. album and its hosts. Physiological alterations in soft-core fruits such as Ankara pear, Braeburn apple and hawtorn when infected with Viscum album ssp. album were investigated. While proportional water content of V. a. ssp. album was found higher than all fruit trees with or without V. album (control), its chlorophyll a content was lower than only control and two hosts (Braeburn apple and Ankara pear). Chlorophyll b content, on the other hand, was similar in all experimental groups for Ankara pear and hawthron whereas, in Braeburn apple, it was significantly higher in control. As for the total chlorophyll and carotenoid contents of V.a. ssp. album, in Breaburn and Ankara pear, they were found less than the controls and hosts whilst in hawthorn, the values were variable. Although proline content of V. a. ssp. album was higher compared to their controls and hosts, total amino acid, reduced and total ascorbic acid, glucose, fructose and sulphydryl acid in V. a. ssp. album were determined to be lower than all uninfected fruits (control).
IntroductionPlants are vital for human nutrition with high numbers of species and numerous cultivars, genotypes, accessions, etc. occurring in most parts of the world. Plants are accepted as one of the most important genetic resources and elements of biodiversity, which support life systems on earth (Sengul et al., 2011;Ercisli et al., 2012;Zia-Ul-Haq et al., 2014).Sugar is one of the essential nutrients for people and sugar cane and sugar beets are the two most important sources of sugar. Approximately 25% of the total sugar produced in the world is derived from sugar beet and 75% from sugar cane. In Turkey and Europe, due to climatic conditions, sugar beet is produced instead of cane sugar as a strategic product (Pankobirlik, 2010). The major countries for sugar beet production in the world are as follows:
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.