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This article studies the effect of light and high temperature on various parameters describing the growth and development of bird cherry ermine moth (Yponomeuta evonymellus L.) – the main pest of bird cherry (Prunus padus L.). We found that light significantly influences the moth masses and dynamics of their development. Moths developed from larvae feeding on leaves growing in full light conditions...
The study evaluates the antifeedant activity of rutin and quercetin (flavonoids of buckwheat Fagopyrum esculentum) and the extract from the leaves of black alder Alnus glutinosa on the development and the extent of damage caused by the beetles of cockchafer Melolontha melolontha in laboratory and semi−field conditions. We found increased mortality and decreased intensity of beetle feeding on the Quercus...
Number of Melolontha grubs in forest soils reforested with Scots pine (Lubartów A, LA, Lubartow B, LB) and those in post agricultural soils afforested with this species (Swierczyna, SW) were assessed before (autumn 2011, spring 2012) and one year after (2013) planting. At the same time, mortality of seedlings was evaluated on both study sites. Pine sawdust was mixed with soil in rows (treatment T1)...
The information about the occurrence of the invasive bark beetle Xylosandrus germanus (Bldf.) in Poland is presented. A set of traits enabling its distinguishing from similar Anisandrus dispar is provided.
The study aimed at the estimation of efficacy of the insecticide Mospilan 20 SP (active substance: acetamipryd 20%) used at different doses to reduce the number of great pine web−spinning pine sawfly Acantholyda posticalis Mats. in aerial (doses: 0.2, 0.3 and 0.4 kg/ha) and ground treatments (dose: 0.4 kg/ha). The mortality of A. posticalis larvae reached 57.5−71.6% in aerial treatments. However the...
The paper presents the study on the impact of Cameraria ohridella on the percentage of leaf blade surface infested by insects, the number of functionally male and female flowers, as well as the germination energy of seeds. The research results show that the area of damage to the leaf may not affect the number of flowers, but it causes a decrease in the number of functionally female flowers as well...
Badano wpływ nawadniania oraz nawożenia azotowego prosa odmiany ‘Gierczyckie’ na występowanie fitofagicznej entomofauny o kłująco-ssącym aparacie gębowym. Doświadczenie polowe prowadzono w latach 2005-2006 w Kruszynie Krajeńskim koło Bydgoszczy. Stwierdzono, że przylżeńce oraz pluskwiaki stanowiły najliczniejszą grupę, która zasiedlała rośliny prosa. Odławiano zdecydowanie najmniejszą liczebność thysanopterofauny,...
The use of entomopathogenic nematodes (Steinernema and Heterorhabditis spp.), against the large pine weevil Hylobius abietis (L.) is currently studied in many countries. They show a great potential of nematodes for H. abietis control in laboratory and field experiments. In 2011 similar studies began in Poland to develop new biological control method of H. abietis with the use of native isolates of...
Study presents a classification model for predicting the occurrence of mass damage in young forest plantations caused by insect pests on roots belonging to Melolontha genus. Logistic regression model was built on the basis of 10 taxation features describing 177 young stands. Habitat fertility, occurrence of Scots pine and European beech, and weed infestation of the habitat are the most significant...
Doświadczenia polowe zostały przeprowadzone w latach 2005-2006 we wsi Kruszyn Krajeński koło Bydgoszczy. Celem przeprowadzonego doświadczenia było określenie wpływu różnych sposobów nawadniania wybranych mieszańców oraz odmian szparaga uprawianego na glebie bardzo lekkiej na występowanie poskrzypek. Badania prowadzono jako dwuczynnikowe w układzie losowanych podbloków, w czterech replikacjach. Czynnikiem...
Celem przeprowadzonego doświadczenia było określenie wpływu stosowania fertygacji podpowierzchniowej azotem różnych odmian szparaga na występowanie poskrzypek. Doświadczenia polowe zostały przeprowadzone w latach 2009-2010 we wsi Kruszyn Krajeński koło Bydgoszczy na młodej nieplonującej plantacji szparaga. Badania prowadzono jako dwuczynnikowe w układzie losowanych podbloków, w czterech replikacjach...
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