Browsing by Author "Šálek L."

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Crowns of “forgotten” standards in hardwood floodplain forests
(2017-01-01) Šálek L.; Machar I.; Sivacioğlu A.; Zahradník D.; Simon J.; Jeřábková L.
Floodplain forests have traditionally been managed using the coppice-with-standards silvicultural system for centuries. After abandoning this silvicultural system approximately in the 1950s the crown of standards (mature-aged trees) developed gradually under the growing influence of their tree competitors. This study examines the crowns of remnant oak and ash standards in a hardwood floodplain forest along the Morava River in the Czech Republic. 100 oak (Quercus robur Linnaeus) standards and 100 ash (Fraxinus excelsior Linnaeus) standards were randomly selected and the basic mensuration data as well as some ecological data, such as number of large dead branches, cavities, and height of the lowest large dead and green branches, were measured. The four nearest neighbour competitors were identified for each standard, and their height, distance and azimuth were measured. The DBH of the analysed oak standards ranged between 71 and 148 cm, and the projected oak crown area ranged between 125 and 533 m2. The ash DBH ranged between 71 and 127 cm, and projected ash crowns between 194 and 620 m2. To assess competitive pressure, we calculated an index as a ratio of the tangents of angles of regular and compressed crowns. Distance of competing trees was more important than their height in the ash data set, but not in the oak data set.
New host plant for the species Agapanthia lateralis Gangl. (Coleoptera; Cerambycidae)
(2014-01-01) Šálek L.; Güney K.
We have found a new host plant for the long-horn beetle Agapanthia lateralis Gangl. in the north Turkey in the city Kastamonu and in its surroundings. The adults hatched from stalks of herb Onobrychis hypargyrea Boiss. where larvae were found. The diet of Agapanthia lateralis is broader than previously thought and a larger diversity of host plants can probably enable them to occur in more diverse habitats.
Predation efficacy of the predator Coccinella septempunctata L. on the Aphid species Macrosiphum rosae (L.) in Kastamonu Province, Turkey
(2017-01-01) Unal S.; Er A.; Akkuzu E.; Šálek L.
This study was conducted between the years 2013-2014 in order to determine the phenology of the predator Coccinella septempunctata Linnaeus (Coleoptera: Coccinellidae) and to evaluate its efficacy on Macrosiphum rosae (Linnaeus) (Hemiptera: Aphididae) in Kastamonu, Turkey. Rearing of C. septempunctata was carried out at 21.3±4.00°C and 78.8±9.44% relative humidity. The first, second, third and fourth larval instars of C. septempunctata consumed 20.3, 54.3, 108.2, and 232.7 M. rosea, respectively. The predation efficacy of the C. septempunctata was increased with the progress of the larval instars up to the fourth which was the most voracious.