<abstract xmlns="http://www.w3.org/1999/xhtml"><italic>Sclerotium rolfsii</italic> is a soil borne pathogen responsible for root and stem rot on a wide range of crops. This study was conducted to identify the virulence of different <italic>S. rolfsii</italic> isolates on a susceptible local peanut germplasm and determine the resistance of 20 peanut genotypes to the most virulent isolate and also the relationship between virulence and mycelial compatibility groups (MCGs). Seventy eight isolates of this fungus from 10 host plants and six known MCGs were used in the experiment. The experiment was done in greenhouse conditions (25±5°C) using a complete randomized block design with three replications. Pots containing sterile soil (pH=6.7) were inoculated with barley seeds colonized by each isolate separately before being seeded with the peanut germplasm. Disease severity was assessed by scoring the wilting, yellowing or death of plants, mycelia or sclerotia production on the soil surface or on plant stem, stem area affected (%) and stem lesion length, at the stage of plant maturity. Also, shoot wet weight and plant height were recorded at this stage. According to the results of the pathogenicity tests, all of the isolates were virulent on the susceptible peanut germplasm and the virulence diff ered signifi cantly between the isolates (P≤0.01). There was no relationship between the virulence of the five groups of isolates identified in the present study and the MCGs. The peanut genotype 140, which was better than the others based on seed size, plant height and the canopy size, was also the most resistant one</abstract>

Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, P.O. Box: 41635-1314, Rasht, Iran

Department of Plant Protection, Rice Research Institute of Iran, P.O. Box: 1658, Rasht, Iran

Evaluation of the virulence of <italic>Sclerotium rolfsii</italic> isolates on <italic>Arachis hypogaea</italic> and screening for resistant genotypes in greenhouse conditions

<abstract xmlns="http://www.w3.org/1999/xhtml"> Two invasive mealybug species, <italic>Phenacoccus peruvianus</italic> Granara de Willink and <italic>Phenacoccus madeirensis</italic> Green (Hemiptera: Pseudococcidae), have been recorded on new species of ornamental plants in diff erent regions of Greece. <italic>Phenacoccus peruvianus</italic> was recorded in Athens on <italic>Cestrum nocturnum</italic> L. (Solanaceae) in September 2013. <italic>Phenacoccus madeirensis</italic> was found in Kalamata (Peloponnese) on <italic>Aloysia citriodora</italic> Palau (Verbenaceae) in May 2014 and on <italic>Osteospermum jucundum</italic> (Phillips) (Asteraceae) in July 2014. This is the first record of <italic>O. jucundum</italic> as host plant of <italic>P. madeirensis</italic></abstract>

Record of <italic>Phenacoccus peruvianus</italic> Granara de Willing and <italic>Phenacoccus madeirensis</italic> (Hemiptera: Pseudococcidae) on new host ornamental plants in Greece

<abstract xmlns="http://www.w3.org/1999/xhtml"> Common burdock <italic>(Arctium minus)</italic> is a common biennial weed of non-arable land in typical rural settings of Orestiada, Greece. The aim of this study was to describe the basic morphological traits of this species throughout the main phenological stages of its life cycle and to obtain some insight into its growth and productivity in Orestiada. Based on our observations, the plants occurred most commonly in moist and fertile soils, usually as isolated individuals or in small patches near the parent plants. The species is characterized by its large basal ‘elephant-ear’ leaves during the vegetative stage, appearing in alternate arrangement, with irregularly wavy and non-toothed edges, as well as with long hollow stalks forming a noticeable furrow on the top. By monitoring individual plants, it was found that fl owering (in the second year of growth) mostly occurred from late June up to early August. The fl owers were purple, occurring in bristly heads at the top of the stem. The bristly heads formed a fruit, containing small black seeds. The average number of capitula per plant, from randomly selected populations in Orestiada, was found to be 69.7 and 57.7 respectively, whereas the mean seed number per capitulum reached 30.3 and 33.3 seeds, respectively</abstract>

Common burdock <italic>(Arctium minus)</italic>: a common weed of nonarable land in Orestiada, Greece

<abstract xmlns="http://www.w3.org/1999/xhtml"> The impact of the monomolecular surface fi lm AquatainTM against mosquito larvae was tested in a rice field in Central Greece. AquatainTM was poured in a 1.2 hectare rice paddy along the one side of the field. Laboratory reared mosquito larvae of <italic>Culex pipiens</italic> were introduced into cages placed in three different transects along the short side of the rice paddy. Larval mortality was counted 3, 6, 15 and 25 days after application. In the line located closer to the site of AquatainTM application, larval mortality ranged from 100% to 70%, 25 days after application. Mortality ranged from 88% to 25% in the middle transect and from 42%, to 10% in the more distant line. The results indicated that AquatainTM provides sufficient larval control in wide mosquito larval habitats</abstract>

Directorate of Plant Produce Protection, Ministry of Rural Development and Food, Greece / Laboratory of Pesticide Science, Agricultural University of Athens, 75 Iera odos Str., GR-118 55 Athens, Greece

Laboratory of Biological Control of Pesticides, Benaki Phytopathological Institute, 8 St. Delta Str., GR-145 61 Kifissia, Attica, Greece

Evaluation of AquatainTM monomolecular surface film against mosquito larvae of <italic>Culex pipiens</italic> in a full-grown rice field in Greece

<abstract xmlns="http://www.w3.org/1999/xhtml"><italic>Euphorbia heterophylla</italic> (wild poinsettia) is reported as an emerging weed in cotton and processing tomato in Kopaida plain, region of Viotia, in central Greece. This is the first record of <italic>E. heterophylla</italic> in tomato crop in Greece. In a field experiment, mature plants grown under weed-free conditions produced on average 19 heads, 64 capsules, and 192 seeds per individual plant. Mature seeds exhibited no dormancy and the maximum germination (82 to 90%) occurred at temperatures from 25 to 35°C, with a drastic decline (&lt;38%) at 15 and 40°C. Light had no significant effect on seed germination in the whole range of temperatures tested. Fully mature plants were taller than cotton, exerting strong competition. Having no light dependence for germination, seeds might have the potential to germinate and emerge from greater soil depths. This short communication summarizes information for the identification, seed germination and growth of this weed species that would support a proper weed management</abstract>

Wild poinsettia <italic>(Euphorbia heterophylla)</italic>: an emerging weed in cotton and processing tomato in Greece

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Hellenic Plant Protection Journal

 The Hellenic Plant Protection Journal (HPPJ) (ISSN 1791-3691) is the scientific publication of the Benaki Phytopathological Institute (BPI) replacing the Annals of the Benaki Phytopathological Institute (ISSN 1790-1480) which had been published since 1935. Starting from January 2008, the Hellenic Plant Protection Journal is published semiannually, in January and July each year.  HPPJ publishes scientific work on all aspects of plant health and plant protection referring to plant pathogens, pests, weeds, pesticides and relevant environmental and safety issues. In addition, the topics of the journal extend to aspects related to pests of public health in agricultural and urban areas.  Papers submitted for publication can be either in the form of a complete research article or in the form of a sufficiently documented short communication (including new records). Only original articles which have not been published or submitted for publication elsewhere are considered for publication in the journal. Review articles in related topics, either submitted or invited by the Editorial Board, are also published, normally one article per issue. Upon publication all articles are copyrighted by the BPI.  Manuscripts should be prepared according to instructions available to authors and submitted in electronic form through Editorial Manager. All submitted manuscripts are considered and published after successful completion of a review procedure by two competent referees.  The content of the articles published in HPPJ reflects the view and the official position of the authors. The information and opinions contained herein have not been adopted or approved by the HPPJ Editorial Board. The HPPJ Editorial Board neither guarantees the accuracy of the information included in the published articles nor may be held responsible for the use to which information contained herein may be put.  For all parties involved in the act of publishing (the author(s), the journal editor(s), the peer reviewers, and the publisher) it is necessary to agree upon standards of expected ethical behavior. HPPJ follows the ethics statements of De Gruyter journals, which are based on the Committee on Publication Ethics (COPE) Code of Conduct guidelines available at www.publicationethics.org.  Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 

Hellenic Plant Protection Journal

Volume 8 (2015): Issue 1 (January 2015)

Evaluation of the virulence of Sclerotium rolfsii isolates on Arachis hypogaea and screening for resistant genotypes in greenhouse conditions

Record of Phenacoccus peruvianus Granara de Willing and Phenacoccus madeirensis (Hemiptera: Pseudococcidae) on new host ornamental plants in Greece

Common burdock (Arctium minus): a common weed of nonarable land in Orestiada, Greece

Evaluation of AquatainTM monomolecular surface film against mosquito larvae of Culex pipiens in a full-grown rice field in Greece

Wild poinsettia (Euphorbia heterophylla): an emerging weed in cotton and processing tomato in Greece

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