Weeds in food legumes: problems, effects and control

Knott, C. M.; Halila, Habib

doi:10.1007/978-94-009-2764-3_45

Cited by 20 publications

(22 citation statements)

References 6 publications

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“…Similarly, Kukula et al (1985) and Knott and Halila (1988) have reported that substantial faba bean seed yield reduction was recorded due to weed competition. Seed yield was significantly correlated with dry matter of broad-leaf and grass weeds (r = 0.61 ** and 0.56 ** , respectively) at Rob Gebeya, but not correlated at Welmera at weeding, while at harvesting the same parameter was not correlated at Rob Gebeya, but negatively correlated (r = -0.48 * ) with broad-leaf weeds and not correlated with grass weeds at Welmera (Table 4).…”

Section: Crop Growth and Yieldmentioning

confidence: 88%

Response of faba bean to phosphate fertilizer and weed control on nitisols of ethiopian highlands

Agegnehu¹,

Fessehaie²

2006

Ital J Agronomy

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The effects of phosphorus fertilizer and weed control on yield and major yield components of faba bean (Vicia faba L.) were studied on Nitisols of Ethiopian highlands. Factorial combinations of four levels of phosphorus fertilizer (0, 10, 20 and 30 kg P ha -1 ) as triple super phosphate (TSP) and two levels of weeding (W1 = no weeding and W2 = hand weeding once six weeks after crop emergence) were laid out in randomized complete block design with three replications. Results indicated that highly significant positive responses of number of pods per plant, total biomass and seed yields of faba bean to phosphorus fertilizer and weeding treatments were noted. Phosphorus level × weed control interaction over three years significantly (P ≤ 0.05) affected faba bean seed yield at Rob Gebeya but not at Welmera. Phosphorus application at the rates of 10, 20 and 30 kg P ha -1 resulted in mean seed yield increases compared to the control of 20, 41 and 53%, respectively on the average of locations; 13, 33 and 51%, respectively at Welmera, and 26, 48 and 55%, respectively at Rob Gebeya. Weeding once increased mean seed yields of faba bean by 25% on the average (35 and 17% at Welmera and Rob Gebeya, respectively) compared to unweeded check. Seed yield was positively correlated with total biomass and number of pods per plant (r = 0.95 *** and 0.75 *** , respectively) at Welmera, and (r = 0.94 *** and 0.55 ** , respectively) at Rob Gebeya. The results of economic analysis indicated that the highest marginal rate of return was obtained from weeding once six weeks after crop emergence and application of 20 kg P ha -1 , which is economically the most feasible alternative on Nitisols of central Ethiopian highlands.

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Section: Crop Growth and Yieldmentioning

confidence: 88%

Response of faba bean to phosphate fertilizer and weed control on nitisols of ethiopian highlands

Agegnehu¹,

Fessehaie²

2006

Ital J Agronomy

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“…The presence of weeds during the first 4, 7 and 10 weeks after sowing accounted for respective yield reduction of 0, 43.3 and 66.9% in field pea (Rezene, 1986). Knott and Halila (1988) also reported substantial yield reduction in food legumes due to weed competition. As depicted in the economic analysis, pre-planting tillage decreased to a great extent the amount of labor required to control weeds.…”

Section: Yield and Yield Componentsmentioning

confidence: 99%

Response of Yield and Yield Components of Field Pea to Tillage Frequency, Phosphorus Fertilization and Weed Control on Nitisols of Central Ethiopian Highlands

Agegnehu¹,

Beyene²

2010

East African Journal of Sciences

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The effects of tillage frequency, phosphorus fertilizer and weed control on yield and yield components of field pea (Pisum sativum L.) were studied in the 2003 and 2004 main cropping seasons on farmers fields in the Chelia and Welmera Districts of west Shewa, Ethiopia. Four levels of tillage frequency (T4 = April, May, early June and at planting; T3 = May, early June and at planting; T2 = May and at planting and T1= at planting) as main plots and factorial combinations of four levels of phosphorus fertilizer (0, 10, 20 and 30 kg P ha-1) and two levels of weeding (W1 = no weeding and W2 = hand weeding once) were arranged as sub-plots in split-plot design with three replications. The results indicated a highly significant positive response of mean field pea seed yield, total biomass and number of pods per plant to tillage frequency, phosphorus fertilizer and weeding treatments. Plowing twice, three and four times including the last pass for seed covering resulted in mean seed yield advantages of 38, 55 and 43%, respectively, compared to the control. Application of phosphorus fertilizer at the rates of 10, 20 and 30 kg P ha-1 increased mean seed yields by 30, 53 and 50%, respectively, compared to the control. Weeding once by hand increased mean seed yield by 16% compared to the unweeded check. Tillage frequency by P fertilizer and weed control interaction significantly affected seed yield. The highest mean seed yield of two years for the tillage, P fertilizer and weed control interaction was obtained from three plowings, 20 kg P ha-1 and weeding once by hand. The yield increment was higher by 232% compared to the control, namely planting with the first pass of ox-drawn implement, with no P application and unweeded condition. Seed yield was highly significantly and positively correlated with total biomass (r = 0.93 **), pods per plant (r = 0.54 **), plant height (r = 0.54 **), seeds per pod (r = 0.41 **) and thousand seeds weight (r = 0.37 **). The results of economic analysis indicated that the treatment with three times tillage, application of 20 kg P ha-1 and weeding once by hand is the best option with a marginal rate of return of 423%, which is economically the most feasible alternative.

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“…These delays, however, reduce potential crop yield substantially (SAXENA 1979, HADDAD 1983and 1984 and do not confer any competitive advantage to the crop plants over weeds emerging with the crops (BASLER 1981). Furthermore, farmers in West Asia usually let weeds attain substantial growth in chickpea and lentil before removing them for use as hay for their livestock (KNOTT and HALILA 1986). Thus, by tbe time weeds are removed the crops have already suffered damage from weed com-petition.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, by tbe time weeds are removed the crops have already suffered damage from weed com-petition. Studies on yield loss as a result of weeds in rainfed winter-sown chickpea and lentil crops in the Mediterranean environments have been limited (SAXENA and WASSIMI 1980, BASLER 1981, KUKULA et al 1983, KNOTT and HALILA 1986, although substantial work in this area has been done in the Indian subcontinent (AHLAWAT et al 1979, MALIK et al 1982, YADAV et al 1983, ALI and KuSHWAH 1985, SINGH et al 1986) and for lentil in North America (DREW 1982, HORNFORD and DREW 1985, CURRAN et al 1987. This research was, therefore, conducted to study the effect of duration of weed mterference on crop productivity and to determine the critical period for weed removal in chickpea and lentil grown in a rainfed cropping system common in the dry areas in the Mediterranean region.…”

Section: Introductionmentioning

confidence: 99%

Effect of Weed Removal on Productivity of Chickpea (Cicer arietinum L.) and Lentil (Lens culinaris Med.) in a Mediterranean Environment

Al-thahabi

Yasin

Abu‐Irmaileh

et al. 1994

J Agronomy Crop Science

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Three field experiments were conducted on chickpea {Cicer arietinum L.) and four on lentil {Lens culinaris Med.) at different winter-sown rainfed locations in Jordan from 1988/89 to 1990/91 to study the effect of the duration of weed-free and weed-infested conditions on yields and yield components of the crops. Chickpea seed yields were reduced on average by 81 % and straw yields by 63 % when fields remained weed infested until harvest compared with weed-free conditions throughout the growing season. The corresponding lentil seed and straw yield decreases were 63 % and 55 %. As the duration of weed-free period increased and the duration of weed-infested period decreased, yields increased. However, the critical period of weed interference was between 35 and 49 days after emergence in chickpea and between 49 and 56 days after emergence in lentil, when these crops were at an advanced stage of vegetative growth. There were significant negative correlations between the weed dry weight and the seed or straw yields. The reduction in seed yields in both crops because of weed interference occurred mainly through the reduced number of pods/plant, which in turn was partly the result of reduced number of secondary branches. In chickpea, some reduction also occurred through reduced 100-seed weight.

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Weeds in food legumes: problems, effects and control

Cited by 20 publications

References 6 publications

Response of faba bean to phosphate fertilizer and weed control on nitisols of ethiopian highlands

Response of faba bean to phosphate fertilizer and weed control on nitisols of ethiopian highlands

Response of Yield and Yield Components of Field Pea to Tillage Frequency, Phosphorus Fertilization and Weed Control on Nitisols of Central Ethiopian Highlands

Effect of Weed Removal on Productivity of Chickpea (Cicer arietinum L.) and Lentil (Lens culinaris Med.) in a Mediterranean Environment

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