Effects of groundnut, cowpea and melon on weed control and yields of intercropped cassava and maize

Zuofa, K.; Tariah, N. M.; Isirimah, N. O.

doi:10.1016/0378-4290(92)90016-3

Cited by 25 publications

(8 citation statements)

References 4 publications

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“…Liebman and Dyck (1993) indicated that intercrops may demonstrate a weed control advantage over sole crops as intercrops may be more effective in usurping resources from weeds. Many researchers (Moody 1978;Zuofa et al 1992;Olasantan et al 1994) also have indicated that mixtures could serve as a complementary biological method to suppress weeds by better utilizing resources. It might also be possible that both competition and allelopathy are contributing to the suppression of purple nutsedge through intercrops.…”

Section: Discussionmentioning

confidence: 97%

Intercropping of field crops in cotton for the management of purple nutsedge (Cyperus rotundus L.)

Iqbal

Cheema

2007

Plant Soil

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A 2-year field investigation was carried out during [2003][2004] to determine the effectiveness of intercropping single and double rows of sorghum, soybean and sesame in a cotton crop on the suppression of purple nutsedge (Cyperus rotundus L.). Results revealed that all three intercrops were effective in inhibiting purple nutsedge density (70-96%) and dry matter production (71-97%) during both years of experimentation. Control in the second year was more effective than in the first year. The seed cotton yield was also depressed by the intercrops but its suppression (8-23%) was far less severe than that of purple nutsedge and its loss was compensated by greater total economic returns. Intercropping of sorghum and sesame produced greater than 20% net benefits (up to 60%) in comparison with the control (cotton alone).Soybean intercropping produced comparable net benefits (95-103%). Sesame two rows intercrop treatment appeared the most profitable with net benefit of 51-59% with good purple nutsedge control (73-92% density suppression, 77-95% dry weight suppression) during both years of experimentation.

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Section: Discussionmentioning

confidence: 97%

Intercropping of field crops in cotton for the management of purple nutsedge (Cyperus rotundus L.)

Iqbal

Cheema

2007

Plant Soil

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“…Nevertheless, yield reductions have been reported, e.g. a reduction in dry matter yield of cassava in intercropping (Okoli, 1996), yield reductions from 15 to 35% and 10 to 40%, when cassava was intercropped with cowpea and groundnut, respectively (CIAT, 1979), and lower root yield in cassava intercropped with groundnut, cowpea and melon (Zuofa et al ., 1992). In contrast, Tijani & Akinnifesi (1997) stated that tuberous root yield of cassava was improved by intercropping of soybean irrespective of the stage of development.…”

Section: Discussionmentioning

confidence: 99%

Effect of soil amendments, intercropping and planting time in combination on the severity of cassava bacterial blight and yield in two ecozones of West Africa

et al. 2004

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The severity of cassava bacterial blight at two sites in the forest-savanna transition (FST) and dry savanna (DS) zones of West Africa were studied by assessing the effects of: (i) shift of planting date; (ii) potassium fertilizer application and mulching; (iii) intercropping cassava with sorghum or cowpea vs. cassava monoculture; and (iv) the combination of these measures. Disease severity of bacterial blight in two genotypes was generally reduced by 20 -60% by late planting, without a negative effect on cassava root yield, in monocropping systems in most treatments in the FST zone (reduction in four treatments, and increase in two treatments, out of 19) and the DS zone (two of eight treatments in 1 year). Late planting led to crop failure in the DS zone in the second year. Intercropping cassava with sorghum reduced bacterial blight severity significantly, up to 80% at normal (all treatments) and late planting time (three out of six treatments) in the FST zone, and in some treatments (four out of seven) at normal planting in the DS zone. Intercropping of cassava with cowpea in the DS zone also reduced disease severity. Cassava-sorghum intercropping generally had no effect on root yield compared with cassava monocropping at both planting times in the FST zone and provided an additional harvest of the intercrop, while yield was affected by intercropping in the DS zone at late, and in some treatments (three out of seven) at normal, planting time. Mulching and potassium treatment had no effect on disease severity, but increased or decreased root yield in some treatments in both sites. Analysis of combined data showed that cropping system, year, site, and site combined with planting date were the highest significant determinants of variation in bacterial blight development.

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“…FenandezAparicio et al (2007) reported that Orobanche crenata infection on faba bean and pea is reduced when these host crops are intercropped with oat, and they suggested that inhibition of O. crenata seed germination by allelochemicals released by cereal roots is the mechanism for reduction of O. crenata infection. Zuofa et al (1992) observed that intercropping maize with 20,000 plants ha 71 of smother crops (groundnut, cowpea and melon) provided the best weed control, highest total yields and land equivalent ratio (LER). Olasantan et al (1994) found that intercropping cassava (Manihot esculenta Crantz) and maize can alleviate weed problems.…”

Section: Introductionmentioning

confidence: 98%

Weed-suppressive effects of maize–legume intercropping in organic farming

Bilalis

Papastylianou

Konstantas

et al. 2010

International Journal of Pest Management

106

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In organic agriculture, intercropping is receiving increasing attention as it offers potential advantages for increasing sustainability in crop production. However, intercropping can increase competition between crops and weeds. In this study, we analyzed the effects of maize-legume intercrops on the weed community in an organic cropping system. We were concerned only with competition between crops and weeds for light. We recorded a statistically significant negative correlation between the fraction of photosynthetically active radiation (F int PAR) intercepted by the canopy, and both weed density and weed dry matter. Maize-legume intercropping led to a higher soil canopy cover (leaf area index) than sole crops. The lowest values for F int PAR were received in sole crops. Thus, in maize-legume intercrops the decrease in available light for weeds led to a reduction of weed density and dry matter, compared to sole crops. Intercropping maize and legumes considerably reduced the weed density in the intercrop compared with the maize pure stand. Weed suppression by crops was also greater on a low-productivity site than on a highproductivity site. Our results indicate that intercropping could be useful for weed suppression in organic row-crops such as maize and cotton.

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Effects of groundnut, cowpea and melon on weed control and yields of intercropped cassava and maize

Cited by 25 publications

References 4 publications

Intercropping of field crops in cotton for the management of purple nutsedge (Cyperus rotundus L.)

Intercropping of field crops in cotton for the management of purple nutsedge (Cyperus rotundus L.)

Effect of soil amendments, intercropping and planting time in combination on the severity of cassava bacterial blight and yield in two ecozones of West Africa

Weed-suppressive effects of maize–legume intercropping in organic farming

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