<i>Ascochyta fabae</i>f. sp.<i>lentis</i>on lentil in New Zealand

Cromey, M. G.; Mulholland, R. I.; Russell, A. C.; Jermyn, W. A.

doi:10.1080/03015521.1987.10425565

Cited by 13 publications

(7 citation statements)

References 3 publications

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“…Yield loss may increase if late maturing cultivars are sown, and if swathing is used as a preharvest treatment during periods when the environment favors disease development (Morrall 1997). Seed quality losses are also economically important when the fungus causes seed staining, as reported in New Zealand (Cromey et al 1987) and Canada (Morrall and Sheppard 1981). Tivoli et al (2006) suggested control measures for ascochyta blight pathogens using an integrated pest management approach involving combinations of cultural management, chemical control, and genetic resistance.…”

Section: Introductionmentioning

confidence: 96%

Sources of resistance to ascochyta blight in wild species of lentil (Lens culinaris Medik.)

Tullu

Banniza

Tar’an

et al. 2010

Genet Resour Crop Evol

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Cultivated lentil (Lens culinaris Medik. subsp. culinaris) has a relatively narrow genetic base and many commercial cultivars are susceptible to ascochyta blight caused by Ascochyta lentis Vassilievsky. A total of 375 accessions of six wild species of lentil received from ICARDA and 18 cultivated genotypes were screened for resistance to A. lentis under both field and greenhouse conditions in Saskatoon, Canada. A mixture of three monoconidial isolates of A. lentis was used as an inoculum and the level of infection rated using the Horsfall-Barratt scale (0-11). Accessions with resistance to A. lentis were observed in all wild species except for L. culinaris subsp. tomentosa (Ladiz.) Ferguson et al. showing no resistant accessions. Several consistently resistant accessions were found among entries of L. ervoides (Brign.) Grande and L. nigricans, (M. Bieb.) Godr., both of which belong to the secondary gene pool and a few in L. culinaris subsp. orientalis (Boiss.) Ponert and L. culinaris subsp. odemensis (Ladiz.) Ferguson et al. belonging to the primary gene pool. Some accessions of L. ervoides exhibited lower disease ratings and AUDPC values than the resistant control cv. 'Indianhead.' Thirteen accessions, previously reported as resistant to Syrian isolates of A. lentis were alsoresistant to the Canadian isolates; some also had resistance to anthracnose. The highest frequency of resistance was found in accessions of L. ervoides which originated from Syria and Turkey. These wild accessions represent a useful and untapped source for improving disease resistance in lentil.

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Section: Introductionmentioning

confidence: 96%

Sources of resistance to ascochyta blight in wild species of lentil (Lens culinaris Medik.)

Tullu

Banniza

Tar’an

et al. 2010

Genet Resour Crop Evol

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“…Although pathogenic races have not been reported, differential reaction of some lines in different countries suggests pathogenic variability in the fungus. Cultivated and wild germplasm was screened both in the field and under controlled conditions, and useful sources of resistance identified (Ahmad and Morrall 1996;Bayaa and Erskine 1994;Cromey et al 1987;Iqbal et al 1990;Singh et al 1982). As in the case of rust, host plant resistance is the control method of choice and cultivars with resistance are now available in Australia, Bangladesh, Canada, India and Pakistan.…”

Section: Biotic Stressesmentioning

confidence: 99%

Crops that feed the world 3. Investing in lentil improvement toward a food secure world

Erskine

Sarker²,

Kumar

2011

Food Sec.

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Lentils play a major role in the food and nutritional security of millions, particularly among lowincome Asian families, because of the high protein content of their seed. As is the case for many pulses, lentils play an important role as a rotation crop, enhancing soil fertility and providing other environmental services in production systems. While its production has risen globally at 8.6 kg/ ha/year from 1961 to 2008, the major challenge is to increase investment in lentil improvement (both research and outreach) in countries where the crop is part of the production system. Where currently grown the major abiotic stresses are low moisture availability and high temperatures in spring, and winter cold at high elevations. Among biotic stresses, rust, and vascular wilt are key, and resistance has resulted in improvements in performance. Additional production constraints include the agronomic problems of pod loss, lodging and poor crop management. Adequate variability for most genetic constraints exists within the gene pool allowing breeding. However, several key traits, such as biomass yield, pod shed, nitrogen fixation and resistance to aphids are not currently addressable by breeding because of insufficient variation. Among lentil-producing developing countries, policies have not yet focused on lentil development needs to enhance food security and provide a remunerative rotation crop for cereals. Looking towards a future in which there is likely to be less water available to agriculture, climate change, food insecurity, rising costs for inorganic nitrogen fertilizer, and an increasingly nutrition-conscious society-collectively these give a bright future for a highly nutritious food produced by a nitrogenfixing crop such as lentil adapted to the farming systems of marginal lands.

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“…The disease has a potential to cause appreciable reduction in yield foliar infection up to 40% yield losses (Gossen and Morall, 1984). The disease has considerable effects on both seed quality and yields (Cromey et al, 1987). A. lentis is specific to cultivated and wild species of lentil (Hernandez et al, 2006;Tullu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Field evaluation of lentil germplasms for their resistance to Ascochyta blight (Ascochyta lentis) under field conditions

Zewdie¹,

Gemachu²

2020

Afr. J. Agric. Res.

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Ascochyta blight caused by Ascochyta lentis is a fungal disease with a major importance in Ethiopia. It has the potential to cause appreciable reduction in yield. The present study was conducted to identify the sources of resistance in lentil to ascochyta blight in 2018 main cropping season in hot spot area in AlemTena research station. The total of 148 accessions were received from Ethiopian Biodiversity Institute were grown in augmented design without replications that only checks were replicated. The spacing was 20 cm between rows with 4m row length. The disease severity was recorded three times at different growth stage every seven to ten days intervals using (1-9) point disease ratings scale. There were high variations in resistance among the tested lines ranged from resistant to highly susceptible. It compares that about 22 were resistant, 58 were moderately resistant and other become susceptible to highly susceptible which is 56 and 11 lines, respectively. In comparison, there are promising lines to use as source of parental materials in which most of the released cultivars lacking the resistance. A wide range of variation to ascochyta blight disease reaction was observed among lentil genotypes. More resistance resources need to be identified to back up breeding programs.

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Ascochyta fabaef. sp.lentison lentil in New Zealand

Cited by 13 publications

References 3 publications

Sources of resistance to ascochyta blight in wild species of lentil (Lens culinaris Medik.)

Sources of resistance to ascochyta blight in wild species of lentil (Lens culinaris Medik.)

Crops that feed the world 3. Investing in lentil improvement toward a food secure world

Field evaluation of lentil germplasms for their resistance to Ascochyta blight (Ascochyta lentis) under field conditions

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