Allelopathic effect of Brassica on weed control and yield of wheat

Abstract

The experiment was conducted at the Agronomy farm of Sher-e-Bangla Agricultural University to identify the allelopathic effect of Brassica species along with their incorporation methods to control weeds in wheat field. The experiment was assigned in a split-plot design where three cultivated Brassica spp. were in the main plot and five different ways of green Brassica biomass inclusion were in the sub-plot. Brassica crops were uprooted at 30 days after sowing (DAS) and incorporated to the soil @ 0.5 kg m-2 as per treatment. Wheat seeds were sown on December 04, 2007 using 20 cm line to line distance. Weeds e.g., Amaranthus spinosus, A. viridis, Lindernia procumbens, Heliotropium indicum, Polygonum hydropiper, Celosis argentina, Ageratum conyzoides, Brassica kaber and Digitaria ischaemum were not found in the wheat field. Significantly the highest weed dry matter (1.72 g m-2) was found in Brassica juncea plots at 30 DAS but in Brassica napus field (1.44 g m-2) at 50 DAS. The lowest weed dry matter at 30 DAS (0.89 g m-2) was recorded with total incorporation of Brassica biomass to the soil but 50% incorporation and 50% spreading at 50 DAS. The Brassica biomass spreading above ground, mixed with soil and 50% spreading + 50% mixed with soil resulted positively compared to other ways of biomass incorporation. The highest grain yield (3.83 t ha-1) of wheat was given by Brassica juncea when spreaded on the above ground soil.Bangladesh Agron. J. 2014, 17(1): 73-80

Indole‐3‐acetonitrile Is a Critical Molecule with Weed Allopathic Suppression Function in Broccoli (Brassica oleracea var. italica)

“…[35,36] However, the allelopathic mechanisms of Brassicaceae remain unclear. [37][38][39] GSLs in Brassicaceae plants are generated by the catalysis of black mustard enzymes [40,41] and secreted through plant vesicles when plant tissues are damaged by pathogens or animal attacks. The GSLs are then hydrolyzed to ITCs, such as thiocyanates and nitriles, which are effective in the allelopathic suppression of pathogenic fungi and weeds.…”

“…The Brassicaceae family is a special plant group with strong allelopathic effects and great potential for controlling weeds and pathogenic microorganisms [35,36] . However, the allelopathic mechanisms of Brassicaceae remain unclear [37–39] . GSLs in Brassicaceae plants are generated by the catalysis of black mustard enzymes [40,41] and secreted through plant vesicles when plant tissues are damaged by pathogens or animal attacks.…”

The allelopathic efficiency of Eruca sativa seed powder in controlling Orobanche crenata infected Vicia faba cultivars

“…Allelopathic plants contain many allelopathic compounds (allelochemicals), offer a great possibility to resolve this critical issue, and could be used by different methods to solve this problem (Javaid et al, 2006;Ma et al, 2006;Iqbal et al, 2007). Brassicaceae plant family is considered one of the most important allelopathic plants that contain many allelochemical mainly glucosinolates which are useful and effective to manage different types of weeds in many crops (Biswas et al, 2014;Ahmed et al, 2016;Messiha et al, 2013Messiha et al, , 2018.…”