Plant Protection Science, 2021 (vol. 57), issue 1
Biocontrol of citrus canker with endophyte Bacillus amyloliquefaciens QC-YOriginal Paper
Jialin Qian, Ting Zhang, Shan Tang, Liangliang Zhou, Kuntai Li, Xueqin Fu, Shuijing Yu
Plant Protect. Sci., 2021, 57(1):1-13 | DOI: 10.17221/62/2020-PPS 
Citrus canker is an important disease caused by Xanthomonas axonopodis pv. citri that affects citrus species. We isolated a bacterium denominated QC-Y with a strong inhibitory effect on citrus canker from navel orange leaves. The isolate was identified as Bacillus amyloliquefaciens based on the morphological, physiological, and biochemical characteristics and the 16S rDNA sequence analysis. The inhibitory activity of the pathogen was significantly affected by environmental factors such as the medium, inoculation amount, media volume, and pH....
Assessing BactoMix 5 efficacy for clubroot control in naturally infested soilOriginal Paper
Kaire Loit, Riinu Kiiker, Britt Puidet, Liina Soonvald, Marian Põldmets, Marika Mänd
Plant Protect. Sci., 2021, 57(1):14-20 | DOI: 10.17221/1/2020-PPS
The cultivation of cruciferous crops is threatened by extensive yield losses caused by the soil-borne pathogen Plasmodiophora brassicae Woronin, 1877. The objective of the study was to assess the potential of the bacterial product BactoMix 5 for the control of clubroot on a naturally infested soil in growth chamber trials using a P. brassicae-specific qPCR methodology. The results did not show a significant decrease in the P. brassicae in the soil nor a reduction of the disease symptoms on the plants. The native soil microbiota may have exhibited an antagonistic activity against the bacterial...
High night temperature promotes downy mildew in grapevine via attenuating plant defence response and enhancing early Plasmopara viticola infectionOriginal Paper
Yoshinao Aoki, Arisa Usujima, Shunji Suzuki
Plant Protect. Sci., 2021, 57(1):21-30 | DOI: 10.17221/92/2020-PPS
The night temperature is one of the critical environmental factors affecting the grape berry quality. The objective of this study was to clarify whether a high night temperature promotes downy mildew on grapevines. The high night temperature conditions suppressed the gene expression of the pathogenesis-related proteins in the grapevine cultured cells and grapevine seedlings compared with the control night temperature conditions. The Plasmopara viticola colony formation on the leaves of the seedlings exposed to the control night temperature conditions became slightly noticeable on day 5 after inoculation, whereas a large number of colonies...
New data on pathotype distribution and mefenoxam tolerance of Plasmopara halstedii in HungaryOriginal Paper
Katalin Körösi, Attila Kovács, Nisha Nisha, István Bóta, Mihály Perczel, Ahmed Ibrahim Alrashid Yousif, József Kiss, Rita Bán
Plant Protect. Sci., 2021, 57(1):31-37 | DOI: 10.17221/73/2020-PPS
Sunflower downy mildew (Plasmopara halstedii) is one of the major diseases that can be controlled by using resistant cultivars and seed dressings; however, several isolates have developed tolerance to some fungicides and the resistance has also been overcome by new pathotypes. We aimed to examine the pathotype distribution in Hungary and to test the pathotypes' mefenoxam sensitivity. The isolates, which provided the basis of the research were collected from different regions of Hungary between 2014 and 2017 and, later, their pathotypes were identified. According to our results, pathotype 704 was one of the most widespread in Hungary, but pathotype...
Genotypic differentiation of Monilinia spp. populations in Serbia using a high-resolution melting (HRM) analysisOriginal Paper
Antonios Zambounis, Eleni Stefanidou, Panagiotis Madesis, Jovana Hrustić, Milica Mihajlović, Brankica Tanović
Plant Protect. Sci., 2021, 57(1):38-46 | DOI: 10.17221/35/2020-PPS
Monilinia laxa, Monilinia fructicola and Monilinia fructigena are the three main causal agents of brown rot, which is one of the most important diseases of stone fruits in pre- and postharvest conditions. Nowadays, the need for the precise genotyping of these Monilinia species in terms of the genetic diversity of their populations or differences in their pathogenicity and host range is a prerequisite for any efficient disease management. In our study, the genetic structure of Monilinia populations in Serbia from three geographically distinct regions was investigated employing a high-resolution melting (HRM)...
Thrips and natural enemies through text data mining and visualizationOriginal Paper
Karmen Stopar, Stanislav Trdan, Tomaž Bartol
Plant Protect. Sci., 2021, 57(1):47-58 | DOI: 10.17221/34/2020-PPS
Thrips can cause considerable economic damage. In order to reduce the use of agrochemicals research has also focused on different natural enemies. We used bibliometric mapping and visualization to understand the structure of this field. Articles from Web of Science as well as software Vosviewer were used. Analysis of co-occurrence of terms shows the principal research areas: transmission of viruses, chemical or biological control and new species. A third of articles refer to biological control. Visualizations reveal three major groups of beneficials: entomopathogens, parasitoids, and predators. Recently, attention has shifted mainly to predatory mites...
Effects of strip intercropping of canola with faba bean, field pea, garlic, or wheat on control of cabbage aphid and crop yieldOriginal Paper
Mostafa Mollaei, Seyed Ali Asghar Fathi, Gadir Nouri-Ganbalani, Mehdi Hassanpour, Ali Golizadeh
Plant Protect. Sci., 2021, 57(1):59-65 | DOI: 10.17221/132/2019-PPS
The impacts of intercropping of canola (Ca) with faba beans (Fb), field peas (Fp), garlic (G), or wheat (Wh) were evaluated on the cabbage aphid, Brevicoryne brassicae (Linnaeus, 1758), natural enemies and canola yields in row ratios of 3Ca : 3Fb, 3Ca : Fp, 3Ca : 3G, and 3Ca : 3Wh in 2018 and 2019. In both years, the lowest aphid population was recorded in 3Ca : 3G. In 2018, the aphid population was significantly (P < 0.05) lower in 3Ca : 3Fp than in the monoculture, while, in 2019, it was lower in the intercrops compared to the monoculture. Furthermore, none of the intercrops, except 3Ca : 3Fb, showed a significant increase in...
Diplodia sapinea in Swedish forest nurseriesShort Communication
Rebecca Larsson, Audrius Menkis, Åke Olson
Plant Protect. Sci., 2021, 57(1):66-69 | DOI: 10.17221/68/2020-PPS
Diplodia sapinea is a common forest pathogen on Pinus spp. in a large part of the world. In 2013, disease caused by this pathogen on Scots pine (Pinus sylvestris) trees in Sweden was reported for the first time. In this study, we report the first detection of D. sapinea on diseased seedlings of P. sylvestris from two Swedish forest nurseries. Infected seedlings were collected July-November 2019. Diplodia sapinea was identified by morphological characteristics of fungal structures on plant tissues and from culture grown on Hagem agar media, followed by sequencing of fungal ITS rDNA. The...
First records of the invasive aphid species, Aphis spiraecola, in Kosovo, Slovakia, the Czech Republic, the United Kingdom and DenmarkShort Communication
Csaba Borbély, Zsuzsanna György, Stine Kramer Jacobsen, Fadil Musa, Jana Ouředníčková, Lene Sigsgaard, Michal Skalský, Viktor Markó
Plant Protect. Sci., 2021, 57(1):70-74 | DOI: 10.17221/108/2020-PPS
In the last few decades, the spiraea aphid (Aphis spiraecola Patch) has become a widely distributed pest of apple and citrus orchards across Europe. In our study, A. spiraecola was observed for the first time in Kosovo, Slovakia, the Czech Republic, the United Kingdom and Denmark, in apple orchards in the growing seasons of 2016, 2018 and 2019. The presence of A. spiraecola was also recorded on other host plants such as the quince (Cydonia oblonga Miller) and Vanhoutte spiraea (Spiraea × vanhouttei) in Slovakia, and the quince, common pear (Pyrus communis Linnaeus) and firethorn (Pyracantha...