Predilection of Chaitophorus populeti and Phyllobius oblongus on four clones of white poplar

Abstract

The predilection of Poplar shoot aphid (Chaitophorus populeti Panzer) and European Snout Beetle (Phyllobius oblongus L.) in the first and second growing season in two experimental plantations. Four white poplar clones were tested: Villafranca, L-100, L-80, and L-12. The first experimental plot was established at the beginning of 2019 and the second in 2020 near Novi Sad (northern Serbia). Predilection of C. populeti Panzer was performed on three plants per each of three blocks and every of four clones. Predilection of P. oblongus L. was evaluated on all leaves of five shoots on three plants per each of three blocks of every of four clones. According to the results of analysis of variance and Tukey's test for several traits describing intensity of damage and percentage of damaged leaves, there was significant difference between examined clones in prevalence of P. oblongus L. Significantly stronger attack was found for clones L-80 and L-12 than on Villafranca and L-100 in both years on plants in their first growing period. The damage from this pest in second growing period could almost not to be detected. In case of C. populeti Panzer, the prevalence was assessed according to the percentage of colonized shoots. The differences between examined clones were significant only in first growing period in 2019, where the strongest attack was found on clones Villafranca and L-100, and the weakest on clones L-80 and L-12. Results of the study are particularly important in the context of clones L-12 and L-80 performances evaluation, considering that these clones are still in the experimental phase of testing. Likewise, the intensity of attacks of studied pest species suggests that special attention to their presence and spreading should be paid in the first growing season after plantation establishment.

Resistance againstLeucoptera sinuella(Lepidoptera: Lyonetiidae) among hybrid clones ofPopulusspp. in central Chile

“…However, significant differences at hybrid taxa (Table 2) and family level (Supplementary Table S1) exhibited no species contribution to resistance to the poplar moth. Previous studies in eastern Europe have described high variability between P. deltoides clones in resistance toward the poplar moth (Poljaković-Pajnik et al 2005, 2012, but only a few clones of the hybrid P. euroamericana (= P. deltoides × P. nigra) were included in that study. Therefore, the available evidence does not support a significant contribution of P. deltoides to poplar moth resistance in the hybrid poplar taxa.…”

“…In the case of leaf miner pests, there are few reports of poplar resistance although several pests of this group can be relevant (Mattson et al 2001, Charles et al 2014). A few studies in eastern Europe have reported a variable resistance of some P. deltoides clones to L. sinuella (Poljaković-Pajnik et al 2005, 2012), but there is no information about other Populus species, hybrids and clones that might contribute to host-plant resistance for breeding and integrated pest management (IPM) programs.…”

“…On the contrary, variation in the concentration of SPGs among poplar species has little impact on the larval performance of the aspen blotch miner, Phyllonorycter salicifoliella (Lepidoptera: Gracillariidae) (Auerbach and Alberts 1992). There is no information about the influence of CTs or SPGs on the poplar leaf miner L. sinuella , although, as mentioned above, there are different resistance levels between clones of P. deltoides in Eastern Europe (Poljaković-Pajnik et al 2005, 2012).…”

Aphid Colonization Affects Gas Exchange and Nitrogen Concentration in Urban Ornamental Shrubs

“…Considering the living habits of aphids infesting urban shrubs, and possible negative consequences, it seems necessary to recognize and quantify changes in plant attributes underlying plant vigor and fitness in (often inhospitable) urban environments. The adverse effects on plant growth, metabolism, mineral nutrition, photosynthetic rate, concentration of chlorophyll, and gas exchange parameters [15][16][17][18][19][20][21] have been reported in aphidinfested plants.…”

The Effects of Nitrogen Fertilisation on the Anatomical Properties of the Populus alba L. Clone ‘Villafranca’ Juvenile Wood

“…It grows well on various site and soil conditions and is somewhat tolerant of climate changes, including drought, temperature, and salinity [ 2 ]. Among the Populus alba L. clones, ‘Villafranca’ is among the most represented and registered reference clones in different nursery trials [ 3 , 4 ]. It is mainly used for the afforestation of river lowlands and is planted in specialised plantations to produce furniture logs, pallets, etc.…”