Allelochemicals: Biological Control of Plant Pathogens and by Inderjit, K.G. Mukerji

By Inderjit, K.G. Mukerji

Biological regulate of plant illnesses and plant pathogens is of serious value in forestry and agriculture. there's nice incentive to find biologically lively average items from greater crops which are larger than artificial agrochemicals and are a lot more secure, from a wellbeing and fitness and environmental point-of-view. the advance of common items similar to herbicides, fungicides, and their function in organic keep watch over of plant ailments, shows a discount in environmental and healthiness risks. Allelopathic concepts provide a true destiny in fixing numerous difficulties, for example organic keep an eye on of plant pests. This booklet is geared up round the indication that allelochemicals will be hired for organic keep an eye on of plant pathogens and plant ailments. particularly, this quantity makes a speciality of (i) discovery and improvement of normal product dependent fungicides for agriculture, (ii) direct use of allelochemicals in addition to oblique results via conceal plants and natural amendments for plant parasitic pest regulate and (iii) software of allelopathy in pest management.

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The effect of Tagetes spp. extracts on the hatching of an Italian population of Globodera rostochiensis. Nematol Medit 1991; 19:135-137. M. Control of root-knot and reniform nematodes by bare-root dip in leaf extract or margosa and persian lilac. Zeitsch. Pflazenkh Pflazen Sch 1988; 95:138-142. S. Factors influencing the effectiveness of non-pathogenic Fusarium solani strain Fs5 in the suppression of root-knot nematode in tomato. Phytopathol. Mediterran, 2003; 42:17-26. S. Pre-plant and post-plant pesticides for nematode control in pineapple.

However, in soils treated with different phenolics and terpenoids, only root growth of lettuce was inhibited, whereas shoot growth was promoted. Recovery of p-hydroxybenzoic acid and umbelliferone was higher in unautoclaved soils, while that of catechin was lower. Nava-Rodriguez et al. (in press) observed the in vitro effects of aqueous leachates from fresh and dry, flowering and vegetative stage of Phaseolus species, faba bean, alfalfa, vetch, maize, and squash, and weed species on the root growth of selected crop and weeds, as well as on two strains of Rhizobium leguminosarum biovar phaseoli (CPMex1 and Tlaxcala).

Einhellig (2002) concluded that the 14 categories suggested by Rice (1984) are sufficiently broad to still retain validity: water-soluble organic acids, straight-chain alcohols, aliphatic aldehydes and ketones, unsatured lactones, long-chain fatty acids and polyacetylenes, naphthoquinones, anthraquinones and complex quinones, gallic acids and polyphloroglucinols, cinnamic acids, coumarins, flavonoids, tannins, terpenoids, and steroids, amino acids, and purines and nucleosides. In this chapter some of the main compounds and studies associated with allelopathy will be mentioned.

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