Allelopathic potential of mango leaves for weed management in rose (Rosa hybrida cv. Happiness) basins.
Challa P., Ravindra V.
Author Affiliation: Division of Plant Physiology and Biochemistry, Indian Institute of Horticultural Research, Hessaraghatta, Bangalore - 560 089, India.
Allelopathy Journal 6 : 75-80
Abstract : In 1997, pruned rose [Rosa sp.] cv. Happiness plants were planted in a field at Hessaraghatta, India. The following weed control treatments were compared: pre-emergence diuron at 1.0 kg a.i./ha + glyphosate (8 ml/litre), oxyfluorfen at 0.5 kg a.i./ha + glyphosate or sulfosate [glyphosate trimesium] (8 ml/litre), mango (Mangifera indica) or neem (Azadirachta indica) dry leaf mulching at 20 kg/plot 15 days after planting, radish [Raphanus sativus] live mulching and manual weeding. All dicotyledonous weeds were controlled by the mango leaf mulch 60 days after treatment. All except Euphorbia hirta were controlled by herbicide treatments. Lagascea spp. and Blumea mollis were present in the neem leaf mulch treatment. Most dicotyledonous weeds present in the control were present in the hand-weeding and radish mulch treatments. Cyperus rotundus and Cynodon dactylon were most effectively controlled by neem leaf and mango leaf mulches, and neem leaf and radish mulches, respectively. Rose growth was not affected by any of the treatments. Under laboratory conditions, 2% mango leaf leachate solution did not affect germination of a number of crops, although finger millet [Eleusine coracana] and french bean [Phaseolus vulgaris] radicle growth were reduced by 80 and 89%, respectively. Mango leachates reduced chlorophyll a and b levels in radish cotyledons.