Volume 11 - 2021
2. First report of leaf spot disease on Woodfordia fruticosa caused by Corynespora cassiicola in Kerala, India
Sreelakshmi VP et al. (2021)
1. Morphological study of nematode on Norfolk Island Pine (Araucaria heterophylla) reveal close relatedness with Deladenus uteropinusus and is the first record in Chiang Mai, Thailand
Chairat K et al. (2021)
Volume 10 - 2020
21. A new record of Lasiodiplodia pseudotheobromae causing leaf spot of Cynometra malaccensis in Thailand
Gomdola D et al. (2020)
20. First occurrence of Golovinomyces bolayi on Lactuca tuberosa in Iran
Pirnia M, Taheri A (2020)
18. Pathogenic Diaporthe from Italy, and the first report of D. foeniculina associated with Chenopodium sp.
Gajanayake AJ et al. (2020)
Volume 7 - 2017 - Issue 1
1. Uromyces trifolii, a new addition to rust fungi of Himachal Pradesh, India, with a checklist of Uromyces in India
Authors: Gautam AK, Avasthi S
Recieved: 17 February 2016, Accepted: 04 November 2016, Published: 24 January 2017
Uromyces is a genus of rust fungi that infects both monocots and dicots throughout the world. The genus is particularly common on plant families like Asteraceae, Euphorbiaceae, Fabaceae, Liliaceae, Poaceae, and Loranthaceae. A rust infection was observed on leaves and stem of Trifolium repens from Himachal Pradesh, India. The symptoms appeared as dark brown to blackish brown pustules. Morphological and microscopic analyses of diseased samples identified it as Uromyces trifolii, which is new to Himachal Pradesh. Taxonomic descriptions and illustrations of the specimen are given. A checklist to assess diversity and distribution of the genus Uromyces in India is provided.
Keywords: checklist – Himachal Pradesh – new record – rust fungi – Trifolium repens
Authors: Erdoğdu M, Suludere Z, Hüseyin E
Recieved: 18 July 2016, Accepted: 25 November 2016, Published: 06 February 2017
Septoria ornithogali on living leaves of Ornithogalum sp. and Phyllosticta onosmae on living leaves of Onosma tauricum var. tauricum are reported as new to the mycota of Turkey. Distinguishing morphological characters are described and illustrated for each species.
Keywords: microfungi – Phyllosticta onosmae – Septoria ornithogali
Authors: Behrooz SY, Salari M, Pirnia M, Sabbagh SK
Recieved: 24 April 2016, Accepted: 16 January 2017, Published: 20 February 2017
Nine collections belonging to the plant pathogenic fungus genus Ramularia from different localities of Kohgiluyeh and Boyerahmad Province (SW Iran) were obtained during spring-autumn 2012–13. Eight species were identified: Ramularia anchusae on Anchusa azurea, R. armoraciae on Barbarea plantaginea, R. cupulariae on Inula sp., R. cynarae on Carthamus tinctorius, R. epilobiana on Epilobium hirsutum, R. grevilleana on Potentilla reptans, R. lamii on Mentha longifolia and Mentha sp. and R. simplex on Ranunculus acris. Ramularia armoraciae, R. cupulariae and R. epilobiana are new records to Iran while Mentha longifolia and Ranunculus acris are new hosts for R. lamii and R. simplex in Iran, respectively.
Keywords: Mycosphaerellaceae – plant disease – Ramularia – taxonomy
4. Prevalence, incidence and molecular characterization of Phomopsis vexans (Diaporthe vexans) causing leaf blight and fruit rot disease of brinjal in Karnataka (India)
Authors: Mahadevakumar S, Amruthavalli C, Sridhar KR, Janardhana GR
Recieved: 20 November 2016, Accepted: 21 January 2017, Published: 07 March 2017
The distribution, prevalence and incidence of Phomopsis vexans in six major brinjal growing agro-climatic zones of southwest India is reported. P. vexans was isolated from diseased leaf and fruit samples from six zones and was studied for its morpho-cultural and molecular characteristics. Eighteen isolates were tested for their pathogenicity on 30-days old brinjal seedlings. The ITS regions of these fungal isolates were used for the molecular identification followed by phylogenetic analysis. The incidence of leaf blight and fruit rot disease was high in northern transition zone (NTZ: 10.6-25.3% and 21-33.3%) followed by southern dry zone (SDZ: 8.3-18% and 22.3-62%) and central dry zone (CDZ: 10-17% and 29-39%). All the isolates exhibited similarities in colony morphology. Variation was observed with regard to number of pycnidia, colony growth and type. Among the 24 isolates, 18 belonged to G-type and the rest could not be ascertained to either colony type. The 18 G-type isolates produced leaf blight and fruit rot symptoms 25-28 and 45-55 days post inoculation, respectively. In the phylogenetic analysis, all the 24 isolates formed a single clade, thus confirming their close genetic relatedness, though they were isolated from different agro-climatic zones of southwest India. Phylogenetic analysis of complete ITS2 sequence showed the presence of two distinct groups based on substitutions and indels observed among the populations where six isolates from NDZ and CDZ formed a distinct group from the rest of the isolates.
Keywords: agro-ecological distributions – molecular phylogeny – pathogenicity – Phomopsis vexans – Solanum melongena
Authors: Arzanlou M, Narmani A
Recieved: 29 May 2016, Accepted: 24 December 2016, Published: 11 March 2017
Tulips (Tulipa spp.) are popular species of bulbous plant belonging to the family Liliaceae. Tulips are ornamental plants commonly used as cut flowers, potted plants, and a garden favourite. During late April 2015, signs and symptoms of a smut disease were observed for the first time on wild grown woodland tulip, T. sylvestris, in the campus of the University of Tabriz (East Azarbaijan Province, Iran). Based on morphological characteristics, the pathogen was identified as Vankya heufleri. This study provides the first report on the occurrence of this fungus on T. sylvestris in Iran.
Keywords: leaf smut – Liliaceae – teliospores – Tulipa sylvestris – Vankya heufleri
Authors: Kumar S, Singh R, Gond DK
Recieved: 29 May 2016, Accepted: 21 January 2017, Published: 11 March 2017
Puccinia bagyanarayanii sp. nov. was discovered on living leaves of Justicia betonica (Acanthaceae) in Madhya Pradesh, India. This species is described, illustrated, and compared with similar taxa. Puccinia bagyanarayanii has a longer pedicle and smooth-walled teliospores compared to similar species known on Justica. A key to similar species of Puccinia found on Justicia is provided. Descriptions and nomenclatural details are deposited in Mycobank.
Keywords: foliicolous rust fungi – fungal diversity – morphotaxonomy – new species – Puccinia
7. Cirsosia humboldtigena sp. nov. (Lembosiaceae, Ascomycetes) on Humboldtia vahliana from Kerala, India
Authors: Mathew KL, Nair NN, Swapna S
Recieved: 20 February 2016, Accepted: 18 November 2016, Published: 11 March 2017
The plant genus Humboldtia contains six species of which five are endemic to Peninsular India. Of these, Humboldtia vahliana was found to be infected with a new species of the genus Cirsosia. Cirsosia humboldtigena sp. nov. is described and illustrated in detail to provide a consolidated account of the species known on this host genus.
Keywords: black mildew − foliicolous fungi − new species
Authors: Gadgile D, Chavan A
Recieved: 14 December 2016, Accepted: 06 February 2017, Published: 13 March 2017
The detection of Aspergillus niger rot, anthracnose and Rhizopus rot infection in post-harvest mango fruit was demonstrated by a non-destructive X-ray scanning technique carried out 4 and 5 days post inoculation. It is suggested that such technology for detection of fungal infection may be useful as an imaging-based mango sorting system.
Keywords: anthracnose – Aspergillus niger rot – Mangifera indica – novel technique – Rhizopus rot
9. Field evaluation of beneficial and deleterious effects of rhizobacteria on cotton stand and yield
Authors: Aly AA, Gomaa EZ, Ashour SME, Zayed AZ, Mostafa MA
Recieved: 19 July 2016, Accepted: 29 December 2016, Published: 29 May 2017
Thirteen Bacillus strains, one Lactibacillus strain, and two Pseudomonas strains were isolated from the rhizosphere of cotton seedlings collected at various locations in Egypt. Three field trials were conducted at Sakha (North Delta Region), El-Gemmeiza (Middle Delta Region), and Sirs El-Lian (Middle Delta Region) in 2015 to evaluate the beneficial and deleterious effects of rhizobacteria on cotton stand and yield. Field evaluation revealed inconsistent performance among strains from one site to another. Thus, while certain strains effectively controlled seedling damping-off at some locations, they were ineffective in controlling the disease at other locations or even increased disease. Seedling stand counts were not correlated with seed cotton yield at Sakha and El-Gemmeiza, while they were highly correlated at Sirs El-Lian. Regarding each of seedling stand counts (survival) and yield, the performance of the tested strains at any site was not correlated with their performance at the other two sites. Grouping the strains by cluster analysis based on their effect patterns was neither related to their taxonomic position nor to geographic origins. Of the 16 strains, strain no. 10 of Bacillus circulans is a promising strain for commercialization for two reasons: firstly, it significantly increased stand at all sites and secondly, it significantly increased seed cotton yield at Sirs El-Lian.
Keywords: cotton – rhizobacteria – stand – yield
10. Histopathological studies of sesame (Sesamum indicum) seedlings infected with Fusarium oxysporum
Authors: Ara A, Akram A, Ajmal M, Akhund S, Nayyar BG, Seerat W, Chaudhry SM
Recieved: 24 June 2016, Accepted: 16 January 2017, Published: 30 June 2017
Sesame (Sesamum indicum L.) is one of the most important and oldest oil seed crops, and vascular wilt caused by the soil-borne fungus Fusarium oxysporum is the most destructive disease of sesame worldwide. Histopathological studies were conducted on sesame plants after artificial inoculation with F. oxysporum. Characteristic disease symptoms such as chlorotic and wilted leaves appeared 15–20 days after inoculation. Light microscopic studies revealed the presence of pathogen in xylem vessels during initial stages. The pathogen then moved to adjacent cortical and epidermal cells intercellularly causing disintegration of the cells. Formation of cavities and plugging of xylem vessels with gum was observed, which retards water and nutrient supply to plants, thus resulting in wilting and ultimately leading to death of plant.
Keywords: disease – histopathology – inoculation – pathogen – sesame