Evaluating eco-friendly botanicals (natural plant extracts) as alternatives to synthetic fungicides
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University Malaysia Perlis, Malaysia
Corresponding author
Ghassan Al_Samarrai   

University Malaysia Perlis, Malaysia
Ann Agric Environ Med. 2012;19(4):673-676
Fungicides are widely used in conventional agriculture to control plant diseases. Prolonged usage often poses health problems as modern society is becoming more health-conscious. Penicillium digitatum, the cause of citrus green mould, is an important postharvest pathogen which causes serious losses annually. The disease is currently managed with synthetic fungicides. There is, however, a growing concern globally about the continuous use of synthetic chemicals on food crops because of their potential effects on human health and the environment.

Material and Methods:
Different concentrations (500-5,000 ppm) of 5 ethanol extracts of Neem, Pong-pong, Chili, Lemon grass, and Ginger were compared with DMSO and fungicide (Guazatine,1,000 ppm) for their anti-fungal activity (inhibition zone) in vitro on PDA media and during storage conditions. Lethality test LC50 (BST) was followed to determine the lethal dose from plant extract compared with the lethal dose for synthetic chemicals (Guazatine).

Crude extraction from Neem, Chili and, Pong-pong showed a complete inhibition zone at 3,000ppm (100%) in the green mould in vitro. At in vivo, concentrations (4,000 and 5,000ppm), Neem, Chili, and Pong-pong showed a high effect on the prevention of the development of mycelia growth Penicillium digitatum on the surface fruits in storage conditions at 25 °C±2. In addition, the lethal concentration (LC50) values of the crude extracts were investigated by using the Brine-shrimp (Artemia salina Leach) lethality test (BST). At 20.5 and 30 μg/ml-1, Neem, Pong-pong and hot Chili showed very high lethal toxicity on brine and effect. Lemon grass and Ginger killed 50% at 495 and 473 μg/ml-1, respectively, compared with controls.

Pong-pong, Neem, and chili showed positive effects on the inhibition of postharvest fungi as alternatives to fungicides, while bearing in mind the increasing global pollution of the environmental. Extracts from Lemon grass and Ginger have interesting antifungal activity and they are also toxic in bioassay against shrimp. These extracts or botanicals have a bright future in modern plant protection to replace conventional synthetic pesticides.

Gupta S, Dikshit AK. Biopesticides: An eco-friendly approach for pest control. J Biopesticides .2010; 3(1): 186-188.
Nicholson GM, Fighting the global pest problem: Preface to the special Toxicant issue on insecticidal toxins and their potential for insect pest control. Toxicant. 2007; 49(4): 413-422.
Eckert JW. Recent developments in the chemical control of post harvest diseases. Acta Horticulture. 1990; (269): 477-494.
Eckert JW, Sommer NF. Control of diseases of fruits and vegetables by post-harvest treatment. Ann Rev Plant Pathol. 1967; (5): 391-432.
Sanjay G, Tiku AK. Botanicals in Pest Management Current Status and Future Perspectives, Biomed Life Sci 2009, PP.317.
Siddiqui FA, Gulzar T. Tetra cyclic triterpenoids from the leaves of Azadirachta indica and their insecticidal activities. Chem Pharm Bull.(Tokyo). 2003; (51): 415-417.
Ruch Ba, Worf R.. Processing of neem for plant protection simple and sophisticated standardized extracts. Abstracts of the Work shop, Neem and Pheromones, University of Uberaba, Brazil, March 29-30 Augusts, 2001; P.499.
McOnie KC. ¬e latent occurrence in citrus and other hosts Guignardia easily confused with G. citricarpa, the black spot pathogen. Phytopathology. 1964; (54): 40-43.
Serrano MD, Martinez-Romero S, Valero D. ¬e use of the natural antifungal compounds improves the bene cial e ect of MAP in sweet cherry storage. Innovat Food Emerg Tech. 2005; (6): 115-123.
Francisco DH, Lippia G .Carya illinoensis Organic Extracts and there in vitro E ect against Rhizoctonia Solani Kuhn. Am J Agric Biol Sci. 2010; 5(3): 380-384.
Ogawa JM, Dehr EI, Bird GW, Ritchie DF, Kiyoto V, Uyemoto JK. (Eds). Compendium of Stone fruit Diseases. APS Press, USA 1995.
Chandra, M., K. Harish, Tripathi, J. Srivastava and N. Rai. Antimicrobial activity of Swietenia Mahogany, callistemon lanceolatus and Cymbopogon Caesius. Icfai Univ. J Life Sci. 2008; (2): 36-41.
Agrios, M.APlant Pathology, Academic Press, New York, 2005.
Adaskaveg JE, Forste. Sommer. Principles of post-harvest pathology and management of decays of edible horticultural crops. In: Post-harvest Technology of Horticultura l Crops, (Eds.) Aader A. University of California Publication, California .2002; (331): 163-195.
Sokovicet MD, Vukojevic J, Marin PD, Brkic DD, Vajs V, van Greenstein LJLD. Chemical composition of essential oils of Thymus and Mentha species and their antifungal activities. Molecules. 2009; (14): 238-249.
Samson JA. Tropical fruits- Tropical agricultural series. Longman Inc., New York, 1984, pp.64-118.
Bashar MA, Baharat R. Antifungal property of Clematis gouriana against some pathogenic root infecting fungi of chickpea. J Indian Bot Soc.1992; 71(1-4): 307-308.
Kadota SL, Marpaung TK, Kimono H. Constituents of the seeds of Swietenia mahogany JACQ. II. Structures of swietemahonin A, B, C, D, E, F and G and swietemahonolide. Chem Pharm Bull. 1990; (38): 894-901.
Chao SC, Young DG, Oberg CJ. Screening for inhibitory activity of essential oils on selected bacteria, fungi and viruses. J Essent Oil Res. 2000; (12): 639-649.
Falah S, Suzuki T, Katayama T. Chemical constituents from Swietenia macrophyllai ark and their antioxidant activity. J .Biol Sci. 2008; (11): 2007-2012.
Mossini SA, Carla GC, Kemmelmeier C. E ect of neem leaf extract and Neem oil on Penicillium growth, sporulation, morphology and ochratoxin. A production. Toxins .2009; (1): 3-13.
Meyer BN, Ferrigni NR, Putnam JE, Jacobsen LB, Nichols DE, McLaughlin JL. Brine shrimp: A convenient general bioassay for active plant constituents. Planta Med. 1982; (45): 31-34.
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