Weed species in rice seedling nurseries in Kafr El-Sheikh governorate, Egypt
1994
Hassan, S.M. | Rao, A.N. (Rice Research and Training Center, Sakha, Kafr El-Sheikh (Egypt))
Twenty species belonging to 13 genera and 9 families were recorded in 30 nurseries. Grasses and broad-leaved weeds accounted for 74 percent of the species. Those occurring most commonly were Cyperus difformis, Echinochloa crus-galli, Ammania bacifera, E. colona, E. oryzoides, and Dinebra retroflexa. All of the farmers surveyed hand weeded the nurseries, achieving 50-70 percent weed control. Hand weeding cannot control Echinochloa spp. due to their morphological similarities with rice seedlings, they are therefore transplanted with rice. The farmers all pulled seedlings in bunches, along with the soil, to avoid making rice seedling bundles. This is another practice that results in transplanting rice and weeds, including E. crusgalli, E. oryzoides, E. colona, and C. difformis. Between 5 and 30 percent of rice hills were infested with transplanted weeds, which are highly competitive with rice
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