Estimation of yield losses in broad bean due to Meloidogyne arenaria in Egypt

Korayem, A. M.

doi:10.18681/pjn.v36.i01.p33-40

Cited by 3 publications

(6 citation statements)

References 1 publication

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“…Faba bean variety Giza 843 was obtained from Egyptian Ministry of Agriculture (Field Crops Research Institute) and cultivated in a sandy loam (69.8% sand, 26.7% silt, 3.5% clay; organic matter= 3.17%, pH = 7.9) soil at El-Nubariya district, Northwest Egypt during 2016-2017 and 2017-2018 seasons. Nematode identification of the targeted area previously (Hammam et al, 2017;Korayem et al, 2018) indicated that the soil and faba bean plants were naturally infested with Meloidogyne arenaria which was confirmed herein at season-end via perineal patterns morphology of ten random females (Taylor and Sasser, 1978) and esterase phenotypes of six individual egg-laying females extracted from faba bean infected roots (Esbenshade and Triantaphyllou, 1985) at each season. Pre-plant sampling included five composite soil samples, each consisted of three subsamples, from 3 field sites.…”

Section: Two Seasons-field Experimentssupporting

confidence: 65%

“…Clearly, the present study materializes biological meaning as it gives an idea about the yield loss corresponding to given plant infestation degree at harvest. Under similar conditions, Korayem et al (2018) found that M. arenaria significantly reduced both pod and dry seed yields of faba bean by 10.6% and 15.2%, respectively. Thus, the higher yield loss in our study reveals that the variety Giza 843 is possibly more vulnerable to M. arenaria damage than El-Nubariya-1 tested in the same area.…”

Section: Calculating the Thresholdsmentioning

confidence: 84%

“…Like other faba bean varieties, e.g., Misr 3, El-Nubariya-1, and El-Nubariya-3, Giza 843 is susceptible to plant-parasitic nematodes (PPNs), especially root-knot nematodes (RKNs) Meloidogyne spp. (Göldi) (Tylenchida: Heteroderidae) (Hammam et al, 2017;Korayem et al, 2018). Although M. incognita (Kofoid and White), M. arenaria (Neal), M. javanica (Treub), and M. artiellia (Franklin) can attack faba bean in the tropics/ subtropics, only the first three species are commonly found in Egypt (Ibrahim, 1985).…”

Section: Introductionmentioning

confidence: 99%

“…Newly reclaimed areas in Egypt assumes the danger of growing crops in light or sandy soils where RKNs can readily multiply and seriously damage many yields. There are few reports about the effect of RKNs on the faba bean plant (Osman and Kheir, 1978;Korayem et al, 2018) or their control (El-Zawahry, 2000;El-Nagdi and Youssef, 2004). No information is available about field losses and gain thresholds due to any natural RKN infestation of Giza 843.…”

Section: Introductionmentioning

confidence: 99%

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The Damage and Gain Threshold of Meloidogyne arenaria on Faba Bean Favors the Use of a Safe Biological Control Over Chemical Nematicides

Hammam¹,

Mohamed²,

Abd-Elgawad³

2023

PJN

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Root-knot nematodes (RKNs, Meloidogyne spp.) cause major agricultural losses worldwide. Some chemical nematicides are effective, but health and ecological issues are confronting their use. Biological nematicides are safe and promising alternatives. The present study examines M. arenaria damage on faba bean and presents effective control methods as Egypt is the world's largest importer of faba bean. Using gain thresholds, the study compares costs of a biological versus a chemical nematicide for M. arenaria control on faba bean. Meloidogyne arenaria was not detected at pre-planting soil samples of two consecutive field seasons. However, the potential of field weeds as hosts/reservoirs for M. arenaria to transfer from weeds and build-up on 'Giza 843' faba bean roots was apparent at harvest. Significant relations were established between the M. arenaria population levels at harvest and weights of faba bean pods. Consequently, the gain thresholds were calculated based on the combined costs of nematode sampling and control. Their calculated values demonstrated more costs in applying the chemical (oxamyl) than the biological (Nemaless, bacterial strains of Serratia marcescens) nematicide; that is, the gain threshold was 0.78 versus 0.57 metric tons of pods feddan −1 (= 4200 m −2 ), respectively. This comparison should serve as a favorable, forward-looking assessment for the economic and safe application of biological pest control. Applying the chemical (oxamyl) or biological (Nemaless) nematicide is justified for M. arenaria control but Nemaless is less costly. Growers should be familiar with these biologicals to boost their use while offering economic and safe control of the nematodes. Cultural practices such as weed control should be strictly utilized for RKN control.

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Section: Two Seasons-field Experimentssupporting

confidence: 65%

Section: Calculating the Thresholdsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Damage and Gain Threshold of Meloidogyne arenaria on Faba Bean Favors the Use of a Safe Biological Control Over Chemical Nematicides

Hammam¹,

Mohamed²,

Abd-Elgawad³

2023

PJN

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“…In Egypt, root-knot nematodes (Meloidogyne spp.) are important plant parasites with a wide host range including faba bean, where the nematode has an increased population density in Behera governorate (Korayem et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Journal of Plant Protection Research

El-Dabaa

Abd-El-Khair

El-Nagdi

2019

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Clethodim herbicide (Cle) and three Trichoderma strains (Tri) were applied either alone or in combination (Cle + Tri) for controlling weeds, root knot nematodes (Meloidogyne arenaria) and Rhizoctonia root rot disease (Rhizoctonia solani) as well as for evaluating their effects on total microbial count in the rhizosphere and the number of Rhizobium nodules on roots in two faba bean cultivars cultivated in naturally heavily infested fields. The evaluated characters were very similar for the two tested cultivars (Nubariya 1 and Sakha 3). Treatment with Cle alone highly reduced the fresh and dry matter of tested weeds (Amaranthus viridis, Cynodon dactylon and Cenchrus ciliaris), followed by Cle + Tri and Tri alone. Cle + Tri highly reduced nematode parameters viz. numbers of J 2 in soil or roots, females, eggs, galls and egg-masses when compared with each treatment alone. Tri alone caused a great decrease in Rhizoctonia root rot infection, followed by Cle + Tri and Cle alone. Total microbial count and Rhizobium nodules were affected only with Cle treatment. Plant growth parameters (shoot length, shoot fresh and dry weight and numbers of branches and leaves) and yield parameters (fresh pod and dry weight, seed number per pod, seed weight and ash pod weight of plant) were greatly improved for Cle + Tri treatments when compared with either Tri or Cle alone.

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