Formulation, characterization and evaluation of encapsulated bioherbicide on Echinochloa cruss galli and Phalaris minor
Formulation and evaluation of encapsulated bioherbicide on weed
DOI:
https://doi.org/10.21921/jas.v8i01.19564Keywords:
Essential Oils, Encapsulation, SEM, Weed BioassayAbstract
Weeds management under organic agriculture demands organic herbicides / bioherbicides.to address this issue an experiment was conducted in Centre of Environment Sciences and Technology, Central University of Punjab, Bathinda to study the effects of different concentration and bioassay of encapsulated essential oil extracted (EOs) from Callistemon viminalis on Echinochloa cruss galli and Phalaris minor under lab conditions. Encapsulation efficiency of gum arabic and maltodextrin (GAMD) EOs increased from 26 to 31% for 4 to 8% of EOs concentration. The sizes of all the particles were found in the range of 1-10 µm. The reduced size in case of EOs loaded GAMD-EOs encapsulates may be due to the application of spray drying method used during the preparation. Maximum germination inhibition was observed with P. minor as compared to the E. crus-galli L. The probable reason behind this may be the relatively smooth seed coat, smaller weight to volume ratio of P. minor as compared to the E. crus-galli L. Among all the treatments basal application of encapsulates with 8 % essential oil was found more lethal and result in maximum phyto-toxicity by registering less shoot length and root length and fresh biomass weight. Also, the individual constituents of the EOs can be explored for their use as herbicides and then their encapsulated formulations can be used for scale up in the field conditions.
References
Alves SF, Borges LL, Santos TO, de Paula JR, Conceição EC and Bara MTF. 2013. Microencapsulation of Essential Oil from Fruits of Pterodon emarginatus Using Gum Arabic and Maltodextrin as Wall Materials: Composition and Stability. Drying Technology 32: 96-105.
Bouajaj S, Romane A, Benyamna A, Amri I, Hanana M, Hamrouni L and Romdhane M. 2014. Essential oil composition, phytotoxic and antifungal activities of Ruta chalepensis L. leaves from High Atlas Mountains (Morocco). Natural Product Research 28: 1910-1914.
Cavar S, Maksimoviš M, Idic D and Pariš A. 2012. Chemical composition and antioxidant and antimicrobial activity of essential oil of Artemisia annua L. from Bosnia. Industrial Crops and Products 37: 479-485.
Fernandes LP, Oliveira WP, Sztatisz J and Novak C. 2008. Thermal properties and release of Lippia sidoides essential oil from gum arabic/maltodextrin microparticles. Journal of Thermal Analysis and Calorimetry 94: 461-467.
Figueiredo AC, Barroso JG, Pedro LG and Scheffer JJC. 2008. Factors affecting secondary metabolite production in plants: volatile components and essential oils. Flavour Fragrance. Journal 23: 213–226.
Gaba S, Fried G, Kazakou E, Chauvel B. and Navas ML. 2014. Agroecological weed control using a functional approach: a review of cropping systems diversity. Agronomy for Sustainable Development 34: 103-119.
Ponce Cevallos PA, Buera MP and Elizalde BE. 2010. Encapsulation of cinnamon and thyme EOs components (cinnamaldehyde and thymol) in ß-cyclodextrin: Effect of interactions with water on complex stability. Journal of Food Engineering 99: 70-75.
Sakee U, Maneerat S, Cushnie TT and De-Eknamkul W. 2011. Antimicrobial activity of Blumea balsamifera (Lin.) DC. extracts and essential oil. Natural Product Research 25: 1849-1856.
Santos EH, Kamimura, JA Hill, LE and Gomes CL. 2015. Characterization of carvacrol ß-cyclodextrin inclusion complexes as delivery systems for antibacterial and antioxidant applications. LWT-Food Science and Technology 60: 583-592.
Singh AK, Singh AK, Kumar R, Prakash V Sundaram PK and Yadav SK. 2017. Indian Cereals Saga: Standpoint and Way Forward. Journal of AgriSearch 4 (1): 1-10.
Vishwakarma GS, Gautam N, Babu JN, Mittal S and Jaitak V. 2016. Polymeric Encapsulates of Essential Oils and their Constituents: A Review of Preparation Techniques, Characterization and Sustainable Release Mechanisms. Polymer Reviews Doi: 10.1080/15583724.2015.1123725.
Vishwakarma GS, Sharma S and Mittal S. 2015. Phytotoxic selectivity analysis of Eucalyptus tereticornis essential oil against rice, Oryza sativa and its weeds, Echinochloa crus-galli and Cyperus rotundus. International Journal of Farm Sciences 5: 78-90.
Zunino MP and Zygadlo JA.2004. Effect of monoterpenes on lipid oxidation in maize. Planta 219: 303-309.
