Volume 3 - 2013 - Issue 1

1. New and noteworthy black mildews from the Western Ghats of Peninsular India

Authors: Hosagoudar VB

Recieved: 29 September 2012, Accepted: 14 October 2012, Published: 03 February 2013

Sixteen black mildews collected from different regions of Western Ghats are described. Of these, Amazonia symploci, Asteridiella fagraeae, Asterdiella hydnocarpigena, Asteridiella premnigena, Asteridiella tragiae, Asteridiella xyliae, Asterina tragiae, Asterina xyliae, Meliola celastrigena, Meliola glochidiifolia, Meliola goniothalamigena, Meliola jasminigena, Meliola phyllanthigena, Meliola pygeicola and Meliola tragiae are new species while Prillieuxina loranthi is reported for the first time from India.

Keywords: Amazonia – Asterdiella – Asterina – Black mildews – Meliola – new species


2. Moringa oleifera, a new host record of Cercospora apii s. lat. from Uttar Pradesh, India

Authors: Kumar S, Singh R, Saini DC

Recieved: 11 February 2013, Accepted: 02 March 2013, Published: 16 March 2013

Cercospora apii s. lat. collected on living leaves of Moringa oleifera (Moringaceae) from Uttar Pradesh, India is a new host record. The fungus is described and illustrated.

Keywords: Cercospora – Foliicolous hyphomycete – Fungi – Morphotaxonomy – New host record


3. Corynespora clerodendrigena sp. nov. causing foliar disease on Clerodendrum viscosum from Sonebhadra forest of Uttar Pradesh, India

Authors: Singh A, Kumar S, Singh R, Dubey NK

Recieved: 20 February 2013, Accepted: 15 March 2013, Published: 15 May 2013

Corynespora clerodendrigena sp. nov. is described and illustrated causing foliar disease on Clerodendrum viscosum (Verbenaceae) collected from forests of Sonebhadra, Uttar Pradesh, India.

Keywords: Corynespora – foliar disease – Fungal diversity – morphotaxonomy – new species


4. Report of a new grape powdery mildew morphotype with branched conidiophores

Authors: Riaz S, Braun U, Lejkina I, Gubler WD, Walker MA

Recieved: 28 April 2013, Accepted: 09 May 2013, Published: 08 June 2013

We report a new morphotype of Erysiphenecator, the fungal pathogen cause of grapevine powdery mildew. Compared to normal isolates, the new morphotype develops the first conidium on the tip of conidiophore by day five after inoculation and stays in arrested growth phase until day 9 or 10. On day 10 or 11, a branch appears at the base of first conidium that independently starts making conidia. Both main and side branches of conidiophores develop chains that are short with 2–4 conidia,their conidia take a longer time to mature, and they have stronger adhesion to sister conidia on the chain. The branching process starts from the centre of the colony and moves to the edges. Mature colonies have a heterogeneous appearance with non-branched conidiophores at the edges of the colony by day 18. The number of conidiophores produced by the new morphotype as compared to a normal unbranched isolate was not significantly different.

Keywords: Conidium – Erysiphe necator – hyphae – mycelium – Vitis vinifera


5. Aspergillus terreus Thom a new pathogen that causes foliar blight of potato

Authors: Louis B, Roy P, Sayanika DW, Talukdar NC

Recieved: 28 April 2013, Accepted: 24 May 2013, Published: 11 June 2013

Foliar blight of potato caused by Aspergillus terreus is reported for the first time. The blight is characterized by a brown leaf apex amounting to 35‒65% of the total leaf surface. The pathogen was identified on the basis of morphological characters and ribosomal DNA sequence data. The fungus produced effuse white colonies, branched hyphae, broom-like conidiophores, and globose accessory conidia measuring 1.5‒2.3 µm in diameter. Koch’s postulates were confirmed by performing pathogenicity test on healthy potato plants.

Keywords: Accessory conidia – Conidiophore – pathogenicity test – rDNA – Solanum tuberosum L


6. First record of Plasmopara obducens on Impatiens walleriana in Taiwan: a destructive disease or chance of limiting the competitive ability of an invasive plant?

Authors: Kirschner R

Recieved: 29 April 2013, Accepted: 25 May 2013, Published: 14 June 2013

The downy mildew Plasmopara obducens is recorded from Impatiens walleriana in Taiwan for the first time. Observation of infected plants indicates that infection spreads quickly and leads to 100% mortality in the population of planted I. walleriana. The micromorphology is described and illustrated. In Taiwan, the host plant is not only an important ornamental flower, but also an invasive weed. The pathogen might spread to naturalized populations of I. walleriana and limit their competitive ability.

Keywords: Balsaminaceae – Chromista – invasive plants – Peronosporales – Oomycota – Straminipila


7. Long term effect of applied compost and bio-agents as integrated treatment for controlling bean root rot disease in solarized soil under field conditions

Authors: El-Mougy NS, Abdel-Kareem F, Abdel-Kader MM, Fatouh YO

Recieved: 11 May 2013, Accepted: 03 June 2013, Published: 25 June 2013

Management of Bean (Phaseolus vulgarus L.) root rot disease caused by Fusarium solani and Rhizoctonia solani was investigated. Efficacy of T. harzianum and P. fluorescens alone or in combination with compost for controlling bean root rot disease in solarized or un-solarized soil under field conditions were studied. In vitro the highest reduction was obtained with P. fluorescens and T. harzianum which reduced the growth area more than 90.6 and 87.4 % for F. solani and R. solani respectively. Under field conditions, the average maximum of soil temperatures in solarized soil was increased by 15.0, 14.3 and 13.1oC at depths of 10, 20 and 30cm of soil surface as compared with un-solarized soil. The pronounced applied treatments throughout two successive growing seasons were compost A (animal waste)combined with T. harzianum or P. fluorescens, followed by compost P (agriculture waste) combined with the same bioagents in solarized soil which they reduced the root rot disease at pre-, and post-emergence growth stages, respectively. As for bean yield the highest increase was obtained at combined treatments of compost A and T. harzianum or P. fluorescens, followed by combined treatments between compost P and T. harzianum or P. fluorescens in solarized soil. Referring to the obtained results in the present study, it could be suggested that combined treatment between compost and bioagents as safety method might be used commercially for controlling bean root rot disease under field conditions. 

Keywords: Bean – Bio-agents – Compost – Disease control – Root rot


8. Response of Arbuscular Mycorrhizal Fungi on Growth and Chlorophyll Content of Three Varieties of Gossypium herbaceum L

Authors: Kirschner R

Recieved: 28 April 2013, Accepted: 24 May 2013, Published: 25 June 2013

Cotton (Gossypium herbaceum L.) is an important cash crop of Gujarat and Maharashtra in India. Soil microflora play a significant role in plant growth. A large number of hybrid and Bt cotto varieties are introduced in the field. Considering the fact that not much data is available on effect of AM fungi on growth performance of cotton varieties, the present study was planned to investigate the effect of arbuscular mycorrhizal fungi on growth and chlorophyll content three different varieties of cotton. A significant increase in all the varieties (Non Bt, Ajeet-11 and Vikram-5) over control in root and shoot length and their dry weight, was recorded. Changes in chlorophyll contents of a, b and total chlorophyll were also observed. It is clear from the observation that the inoculation of cotton plants with AM fungi was helpful in enhancing the plant growth.

Keywords: AM Fungi – chlorophyll – Gossypium herbaceum L.


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Plant Pathology & Quarantine Online publishes reviews, research articles, methodology papers, and taxonomic works in the field of plant pathology. The official journal language is English.


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