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Trischidothrombium discrepans (Willmann, 1950) is redescribed basing on postlarval instars. The larva of the genus is described for the first time. Data on habitat specificity and phenology of the species as well as on larval developmental time are given. A female, from which larvae were obtained by experimental rearing, has been designated as neotype. The distribution of the genus, hitherto known...
In current study 13 native Rubus species of Corylifolii section, cultivated in the Dendrological Garden of University of Life Sciences in Poznań, were investigated. Phenology and growth rate of vegetative and generative stems of these plants were analyzed. Some habitat factors (temperature and precipitation) were also taken into consideration. The differences in seasonal rhythm of individual taxa...
From among 392 Picea abies trees growing at the height of 700-800 m above the sea level in the Beskid Sądecki mountain range of the Carpathians (49o35’ N, 19o31’ E, southern Poland), infested by cambio- and xylophagous insects, 110 (28.1%) were also attacked by Ips amitinus (Eichh.). This bark beetle infested most willingly the weakened standing trees of age classes III-V (i.e. 41-100 years old) as...
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