Cowpea reactions to Alectra vogelii I:

Alonge, S.O.; Lagoke, S. T. O.; Ajakaiye, Christianah O.

doi:10.1016/s0261-2194(00)00142-3

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…Minimum and maximum days to 50% anthesis were recorded on Jessa and Guinea fowl which took mean days of 36 and 58, respectively. These results contradict the findings of Alonge et al (2001a) who reported that A. vogelii infection expedited anthesis in cowpea. In this study, infected plants exhibited late flowering compared to non-infested and they varied with about 3-4 days across genotypes.…”

Section: Discussioncontrasting

confidence: 99%

“…The known hotspots of A. vogelii infestation in legumes include countries like Botswana (Fite et al, 2009), Ethiopia (Hussein et al, 2006), Malawi (Kabambe and Bokosi, 2020), Nigeria (Motagi et al, 2014), Tanzania (Mbega et al, 2010) and Africa-wide (Kureh and Alabi, 2003;Kureh et al, 2005). Its infestation has been reported largely in groundnuts, cowpeas, common beans and bambaranuts (Alonge et al, 2001a;Mandumbu et al, 2016;Mbwando et al, 2017;Phiri et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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In vivo and in vitro performance studies on groundnut (Acharis hypogea L.) genotypes for yellow witchweed (Alectra vogelii Benth.) resistance

Makaza,

Rugare,

Mabasa

et al. 2021

J. Current Opinion Crop Sci.,

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Witchweed (Alectra vogelii Benth.) is a legume parasitic weed that causes severe yield reduction of groundnut (Acharis hypogea L.) in Africa. The study was conducted to screen and identify Alectra vogelii resistant and/or tolerant groundnut genotypes evaluated under both laboratory and glasshouse at the University of Zimbabwe during 2018/19 cropping season. The findings of the lab agar-gel screening experiment revealed significant differences in germination percentage and germination distance between genotypes. Significant genotype x A. vogelii infestation interaction on plant biomass, root to shoot ratio and shelled grain yield were observed. Alectra vogelii parasitism significantly reduced plant biomass and shelled grain yield across groundnut genotypes. Conversely, genotypes like Njiva, Ilanda and Guinea fowl did not support any haustorial attachment, and had the highest shelled grain yield under all A. vogelii infestation levels. Assessment of A. vogelii tolerance based on groundnut growth, physiological and yield related parameters revealed that the groundnut genotypes Njiva, Ilanda and Guinea fowl tolerated A. vogelii infection, whereas Dendera, Jessa, Nyanda and Tern could be susceptible. Field studies are expected to validate the initiative of breeding with farmers of tolerance groundnut genotypes to A. vogelii infection.

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Section: Discussioncontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In vivo and in vitro performance studies on groundnut (Acharis hypogea L.) genotypes for yellow witchweed (Alectra vogelii Benth.) resistance

Makaza,

Rugare,

Mabasa

et al. 2021

J. Current Opinion Crop Sci.,

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“…At this site, only a final harvest was made for grain yield. At the mature grain stage, virtually all plants were parasitized by yellow witchweed ( Alectra vogelii ), which is common in many parts of Africa (Alonge et al ., 2001). The weed infestation and damage by insect pests were responsible for an uneven plant stand with a coefficient of variation reaching 30%.…”

Section: Resultsmentioning

confidence: 99%

COWPEA (VIGNA UNGUICULATA) CROPS IN AFRICA CAN RESPOND TO INOCULATION WITH RHIZOBIUM

et al. 2016

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SUMMARYCowpea (Vigna unguiculata L. Walp) is the most important food grain legume in Africa. Cowpea is nodulated by rhizobium bacteria in almost all soils of the tropics, but studies performed in the 1970s and 1980s in Nigeria suggested only modest responses of grain yield in the field to inoculation of selected rhizobium strains. More recently, experiments performed in Brazil have shown that cowpea responded to inoculation of rhizobium selected locally and grain yields increased by up to 30%. We tested some of the Brazilian strains on cowpea at a site in northern Mozambique and at several sites in Northern Ghana. At all sites phosphorus fertilizer (26 kg P ha−1) was added to all plots. At the site in Mozambique despite considerable damage to the crop by the parasitic yellow witchweed (Alectra vogelii), grain yields were more than doubled by inoculation of one of the Brazilian strains and reached 1.4 Mg ha−1. In on-station experiments conducted in 2012 in June and August in northern Ghana using the local cowpea variety Padi-Tuya as the test crop, nodule weight at 35 days after planting (dap) tripled with rhizobium strain BR 3299 (530 mg plant−1) in August with the other inoculants (BR 3267 and a mixture of BR 3267 and BR 3299) also increased nodule weight to over 300 mg plant−1. In the first on-station experiment, grain yields were doubled by the inoculation of any of the three rhizobium strains, and in the second experiment, significant increases in grain yield ranged from 39% to 57% and reached over 2.0 Mg ha−1. Similar increases in nodulation and grain yield due to inoculation were observed in 22 on-farm trials. Nitrogen fertilizer application promoted vegetative growth but did not increase grain yield and nodulation. Inoculating cowpea with highly effective rhizobium strains can therefore enhance grain yield of smallholder farmers in Africa.

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“…Grain yield reduction caused by Alectra infestation has been attributed to reduced root nodulation, shoot-root ratio and leaf area (Alonge et al, 2001a). Other research showed that Alectra infestation caused delayed onset of fl owering and reduced number of fl owers (Mugabe, 1983) as well as reduced number of pods per plant, individual seed weight and grain total soluble carbohydrate (Alonge et al, 2001b).…”

Section: Introductionmentioning

confidence: 99%

Agronomic performance of improved Cowpea varieties under natural infestation with Alectra vogelii (benth.) in the northern guinea savannah of Nigeria

Olufajo¹

2012

Agricultura Tropica Et Subtropica

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Field trials were conducted over three years at Samaru in the northern Guinea savannah ecological zone of Nigeria to evaluate the performance of 20 improved cowpea varieties under conditions of natural infestation by a parasitic weed, Alectra vogelii (Benth.). Grain yield ranged from 695 to 2043 kg ha-1 .The best yielding varieties were IT95K-1072-57 and IT97K-499-35. These varieties also hosted very low number of Alectra shoots, suggesting that they are resistant to it. In addition to high grain yield, both varieties produced high fodder yield, making them to be dual purpose varieties. They are therefore ideal for the semi-arid zone where livestock production is an integral part of the farming system and Alectra is a major constraint to the attainment of high cowpea yield. Alectra did not emerge on two of the varieties (IT95K-1090-12 and IT97K-818-35), indicating that they are highly resistant to the weed, but these varieties were among the poorest yielders. They may, however, be good sources of Alectra resistance in cowpea breeding programmes. Four varieties, IT95K-1380, IT93K-273-2-1, IT95K-222-5 and IT93K-573-5 supported high number of Alectra shoots and were therefore highly susceptible to its parasitism.

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Cowpea reactions to Alectra vogelii I:

Cited by 9 publications

References 9 publications

In vivo and in vitro performance studies on groundnut (Acharis hypogea L.) genotypes for yellow witchweed (Alectra vogelii Benth.) resistance

In vivo and in vitro performance studies on groundnut (Acharis hypogea L.) genotypes for yellow witchweed (Alectra vogelii Benth.) resistance

COWPEA (VIGNA UNGUICULATA) CROPS IN AFRICA CAN RESPOND TO INOCULATION WITH RHIZOBIUM

Agronomic performance of improved Cowpea varieties under natural infestation with Alectra vogelii (benth.) in the northern guinea savannah of Nigeria

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