If you use this technique on Dandelions, you’ll wipe out most plants with two treatments. With more stubborn weeds, this process could continue for multiple seasons, but don’t give up! Every time the plant pushes out new leaves that are killed, that effort is depleting food supplies in the root. At some point, food reserves will run out, and the plant will die.
If they set seed, mowing with a grass-catcher bag attached is a way to cut and collect seeds before they drop. This method works well with grassy lawn weeds, such as Quack Grass and Goosegrass. Rake weeds before mowing to pull seed stems upright. After mowing, destroy or dispose of seeds – don’t add to your compost pile. Be careful not to rake if seeds are dropping, or you risk spreading seeds.
Prevent A Problem From Sprouting
From the moment annual weeds sprout, they’re racing to flower and set seed. Your job is to interrupt the process. If you can’t kill weeds or pull them shortly after they appear, make sure you deal with them before they set seed.
Hand weeding is the most widely practiced intervention against weeds on small‐scale rice farms in Africa (e.g., Adesina et al., 1994 ), yet this is labor demanding, and requires 250–780 man h ha − 1 ( Akobundu, 1987; Akobundu and Fagade, 1978; Stessens, 2002 ). Using this labor requirement, and assuming eight working hours a day at a daily wage of €1.5 per person, weeding costs range from €48 up to €149 per ha. This, however, assumes that farmers have alternative opportunities for employment that pay €1.5 per person or more. Vissoh et al. (2004) showed that hand weeding costs (€57 per ha) were comparable to the costs of applying herbicide (Garil) to rice (€58 per ha) in Benin. On subsistence farms, weeding is mostly carried out by women from the farm household and involvement of children is common. On larger farms, labor for hand weeding may be hired from outside the farm family and, in these cases, costs can exceed those for herbicide use.
Tasawar Abbas , . Robert J. Kremer , in Advances in Agronomy , 2018
Virender Kumar , Jagdish K. Ladha , in Advances in Agronomy , 2011
Mechanical and Physical Method
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Mubshar Hussain , . Khawar Jabran , in Non-Chemical Weed Control , 2018
Mohammad Mehdizadeh PHD , Waseem Mushtaq PhD , in Natural Remedies for Pest, Disease and Weed Control , 2020
Due to a common lack of equipment and mechanization in the rain‐fed lowland production systems, fields are often inadequately tilled, bunded, and leveled. Unleveled land and the absence of bunds in the inland valleys result in uneven flooding and patchy conditions which favors weed growth and increases weed control costs ( Akobundu and Fagade, 1978; Ampong‐Nyarko, 1996 ). Puddling, or the thorough tillage of flooded soil, besides controlling any established weeds, promotes vigorous rice growth and enhances crop competitiveness with weeds ( De Datta and Baltazar, 1996 ). Soil puddling is not widely practiced in Africa, as it is in Asia, which is perhaps primarily due to the lack of draught animals and small power tillers noted above.