Research Article 
Weeds Management in Broadcasted Onion (Allium cepa)
Syed Waseem-ul-Hassan and Muhammad Faheem Malik
Asian Journal of Plant Sciences, 2002, 1(1), 28-30.
Abstract
The experiment was conducted for the three consecutive years (1995-97) at three different locations (Agriculture Research Institute, Sariab, Quetta and private farms at Kanak and Kalat in Balochistan) simultaneously. The objective was to manage weeds by the conventional hand weeding (two hand and four hand) and weedicides; 2,4-D (Phenoxy acid), Ronstar (Oxadiazon) and Tribunil (Methabenzthiazuron) application in onion (Allium cepa L.). Morphological characters of plant (number, size and weight of bulbs) were considered for measuring the crop yield in broadcasted onion. The >14 weeds of different families were recorded from the experimental plots. Cyperus rotundus at ARI, Quetta and Convolvulus arvensis at the other two locations were the most destructive. Ameranthus hybridus, Convolvulus arvensis, Chenopodium album, Echinochloa spp. and Sophora alopecuroides) also caused significant damage to the crop yield. All the weeds were significantly controlled by the cultural and chemical control methods. Four hand weeding provided; minimum weed density (11.67) at Kalat, maximum number of bulbs (793) at Kanak, maximum bulb size and bulb weight (21.23 cm and 320 gm, respectively) at ARI, Quetta and the best yield (29.50 tons ha-1) from the experimental plot at Kalat. Cultural control (four hand weeding) is recommended as the best weeds control treatment in broadcasted onion in the province of Balochistan.
ASCI-ID: 7-50
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