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African Crop Science Journal
African Crop Science Society
ISSN: 1021-9730
EISSN: 1021-9730
Vol. 10, No. 2, 2002, pp. 157-162
Bioline Code: cs02015
Full paper language: English
Document type: Research Article
Document available free of charge

African Crop Science Journal, Vol. 10, No. 2, 2002, pp. 157-162

 fr
Rambakudzibga, A.M.; Makanganise, A. & Mangosho, E.

Résumé

Le désherbage retardé est la cause première de la perte de rendement chez les petits agriculteurs. Le coût due à la gestion de mauvais herbes peut etre diminué si le control initial est reserve aux herbes dans les lignes, accompagné juste après de l'enlevement des herbes entre les lignes avant que la compétition ne s'installe. Cette stratégie permettra certainement de minimiser l'effet de compétition des mauvais herbes d'entre et dans les lignes. Cependant, l'étendue à désherber dans les lignes et le rythme des désherbages ultérieurs entre les lignes sont largement inconnus. Des experiences ont été conduits pendant les saisons pluvieuses de 1993/1994 pour determiner l'influence de l' Eleusine indica check for this species in other resources (L.) Gaertn (Rapoko) sur le maïs. Cette étude a été menée dans les conditions des champs pendant les saisons pluvieuses de 1994/1995 et 1995/1996. En plus de l'étendue à désherber le rythme de désherbage entre les lignes a été étudié. Indica E. à 40 cm d'espacement était aussi éfficace que ceux plus proches des lignes de mais en reduisant le rendement en grains en conditions controllées. Cette reduction était significativement moindre dans les conditions des champs. Les resultats de deux saisons suggèrent que les herbes entre les lignes doivent etre enlevées quatre semaines après la germination pour éviter les pertes en rendement.

Mots Clés
Rendement de maïs, Rapoko, rythme de sarclage, Zea mays check for this species in other resources

 
 en Competitive Influence Of Eleusine Indica check for this species in other resources And Other Weeds On The Performance Of Maize Grown Under Controlled And Open Field Conditions
Rambakudzibga, A.M.; Makanganise, A. & Mangosho, E.

Abstract

Delayed weed removal is the primary cause of maize yield loss in smallholder agriculture. The slog for weed management could probably be reduced if the initial weed control removal is restricted to the in-row weeds, followed soon after by elimation of inter-row weeds before competition sets in. This strategy would most likely minimise the competitive effect of both intra-row and inter-row weed infestations. However, the width of the area that must be weeded along the crop row and the timing of the subsequent inter-row weeding are largely unknown. Experiments were carried out in 1993/94 rainy season under controlled conditions to assess the area of influence of Eleusine indica check for this species in other resources (L.) Gaertn (Rapoko grass) on maize. The study was also carried out under field conditions during the 1994/95 and 1995/96 rainy seasons, and in addition to weed width to be removed, the timing of the subsequent inter-row weeding was also studied. While E. indica plants spaced 40 cm were as effective as those closer to the maize row in reducing grain yields under controlled conditions, grain yield reduction was significantly (P<0.05) less under field conditions. Furthermore, results of both seasons suggest that inter-row weeds must be removed by four weeks after crop emergence to avoid maize grain yield reduction.

Keywords
Maize yield, Rapoko grass, weeding time, Zea mays check for this species in other resources

 
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