Plant Protection Science, 2018 (vol. 54), issue 2
Identification of rhizobacteria that increase yield and plant tolerance to angular leaf spot disease in cucumberOriginal Paper
Ahmet Akköprü, Hatice Özaktan
Plant Protect. Sci., 2018, 54(2):67-73 | DOI: 10.17221/41/2017-PPS 
The biological control of angular leaf spot disease (ALS) of cucumbers (Cucumis sativus), caused by Pseudomonas syringae pv. lachrymans (Psl), using promising rhizobacteria (RB) and to compare RB efficacy to that of acibenzolar-S-methyl (ASM) was investigated. Effects of ASM and RB isolate Pseudomonas putida AA11/1 that was isolated from the healthy cucumber root surface on disease severity and plant growth were evaluated using ALS-susceptible and tolerant cucumber cultivars in a growth chamber and a soilless growing system. ASM and AA11/1 significantly...
Effect of MgSO4 nutrition on Theobroma cacao L. susceptibility to Phytophthora megakarya infectionOriginal Paper
Emile Minyaka, Collette Vanessa Madina Banen, Barbara Kusznierewicz, Oumar Doungous, Soungouna Haouni, Joseph Hawadak, Nicolas Niemenak, Denis Ndoumou Omokolo
Plant Protect. Sci., 2018, 54(2):74-82 | DOI: 10.17221/124/2016-PPS
A new strategy to reduce the severity of black pod disease (BPD) in T. cacao plants using MgSO4 nutrition was investigated. The dynamics of the tolerance to BPD of 18 susceptible T. cacao plantlets coming from the cross (♀SNK64 × ♂UPA14) was monitored during weekly (8 weeks) supply of MgSO4 into the soil. Prior to MgSO4 application, disease scores of the 18 plantlets (in six sets of three plantlets per set) were varying between 3.5 (susceptible) and 5 (highly susceptible). After MgSO4 application, a substantial decrease in disease scores was observed compared...
New highly aggressive pathotype 354 of Plasmopara halstedii in German sunflower fieldsOriginal Paper
Otmar Spring, Reinhard Zipper
Plant Protect. Sci., 2018, 54(2):83-86 | DOI: 10.17221/99/2017-PPS
Downy mildew of sunflower is a recurrent threat for crop production and a permanent challenge for resistance breeding. Since 2016, a new pathotype of the oomycete Plasmopara halstedii has been found in fields of cutting sunflower in Southern Germany. Infection assays based on sunflower differential lines identified the pathogen as pathotype 354 which has not yet been described anywhere else. The new pathotype readily infected the host lines Ha-304, RHA-265, PM13, 803-1, and Ha-335, whereas RHA-274, PM17, HAR-4, and QHP1 remained uninfected. It is the first isolate of Plasmopara halstedii to overcome the Pl-6 resistance...
Effects of potassium fertilisation on late potato blight and yield - short communicationShort Communication
Jolanta Kowalska, Dariusz Drożdżyński
Plant Protect. Sci., 2018, 54(2):87-91 | DOI: 10.17221/79/2017-PPS
Potato yields and infestation by P. infestans are related to the supply of potassium. Potassium was applied as soil fertilisation combined with split foliar applications or only as split foliar treatments at a maximum dose of 150 kg/ha K2O in both strategies, Lord and Ditta cultivars were used. Additionally, water spraying was included as an alternative treatment in order to maintain uniform moisture in the rows of plants. Plants fertilised with foliar spraying only were more infested than plants fertilised with combined methods. The fertiliser increased the protection impact of copper treatments against P. infestans....
A new disease of strawberry, fruit rot, caused by Geotrichum candidum in China.Original Paper
Wenyue Ma, Ya Zhang, Chong Wang, Shuangqing Liu, Xiaolan Liao, 3*
Plant Protect. Sci., 2018, 54(2):92-100 | DOI: 10.17221/76/2017-PPS
A new disease of strawberry (Fragaria ananassa Duch.) was discovered in the Lianqiao strawberry planting base in Shaodong County, in Hunan Province, China. In the early disease stage, leaves showed small black spots surrounded by yellow halos, while in the late stage, a white fluffy layer of mold appeared. Fruits were covered with a white layer of mold. The symptoms were observed using in vitro inoculation experiments. After the spray-inoculation of stabbed leaves, small black spots surrounded by yellow halos occurred on leaves, with no clear boundary between diseased and healthy areas. In the late stage, disease spots gradually...
Influence of selected fungicides registered in the Czech Republic for winter oilseed rape on in vitro Sclerotinia sclerotiorum mycelial growthOriginal Paper
Jana Poslušná, Eva Plachká, Jana Mazáková
Plant Protect. Sci., 2018, 54(2):101-110 | DOI: 10.17221/137/2016-PPS
The baseline sensitivity of 55 isolates of Sclerotinia sclerotiorum, collected from oilseed rape in 6 regions of the Czech Republic, to selected fungicides was determined during the period 2013-2015. One single-component fungicide - Horizon (tebuconazole), and four multicomponent fungicides - Pictor (boscalid, dimoxystrobin), Efilor (boscalid, metconazole), Prosaro 250 EC (prothioconazole, tebuconazole), and Propulse (fluopyram, prothioconazole), were chosen as these are commonly used locally. The effect of each fungicide on the in vitro pathogen radial mycelial growth and EC50 values for the respective fungicides were...
Pathogenicity of Beauveria bassiana strain 202 against sap-sucking insect pestsOriginal Paper
Ghulam Ali Bugti, Wang Bin, Cao Na, Lin Hua Feng
Plant Protect. Sci., 2018, 54(2):111-117 | DOI: 10.17221/45/2017-PPS
An experimental trial was conducted to determine the pathogenicity of Beauveria bassiana strain 202 (Bb-202) against multiple targeted sucking insect species that are serious pests of crops and ornamental plants. The insect species, Myzus persicae Sulzer (Hemiptera: Aphididae), Jacobiasca formosana Paoli (Hemiptera: Cicadellidae), Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae), and Stephanitis nashi (Hemiptera: Tingidae) were exposed to conidia of B. bassiana at rates of 1.0 × 102, 3.5 × 103, 5 × 104, and 6.75 × 105 conidia/mm2 to determine...
Seasonal fluctuation of Agriotes lineatus, A. obscurus and A. sputator click beetles caught using pheromone traps in PolandOriginal Paper
Magdalena Jakubowska, Jan Bocianowski, Kamila Nowosad
Plant Protect. Sci., 2018, 54(2):118-127 | DOI: 10.17221/39/2016-PPS
The trap catch of Agriotes species and dynamics of the occurrence of adult click beetles using pheromone traps were determined, and the relationship between the dynamics of the caught wireworms and the placement of traps in selected agricultural crops was investigated. The study was conducted in 2011-2014 in the fields of different crops at five localities in two regions in Poland. The effectiveness of trapping the Elateridae beetles using pheromone traps varied in different localities. The results of the analysis of variance indicate statistically significant differences in the number of A. lineatus beetles only in individual years...