81 uppsatser · sida 4 av 6
… can be both chemical and biological. They are used for weeds (herbicides), insects (insecticides), and fungi (fungicides) and as growth retarders.Many horticulture workers get in touch with plants, treated with PPPs and many of these don’t use any protective equipment.The aim of …
… has resulted in an increased awareness about resistance towards pyrethroids in insects. Pyrethroids inhibit voltage-sensitive sodium channels (VSSC) in nerve cell membranes and are composed of synthetic molecules based on pyrethrins present in pyrethrum extracts from …
… wood was measured along with the number of tress with traces of woodpeckers, insect holes, occurrence of lichen and tree living fungus was counted and documented. The number indicated a nature value. All values were compared to the reference survey circles in surrounding forest …
… increasing problems with tortricids in Swedish apple orchards. Since the insecticide Gusathion (azinphosmethyl) has been banned (end of 2008; KemI 2008), a further increase of tortricid populations can be expected. In order to get a picture of species composition and population …
en fältstudie av bieffekter av insekticidinducerad eliminering av signalkräfta på Gotland
Direct effects of the insecticide deltamethrin on zooplankton and benthic invertebrates werestudied during an attempt to eradicate signal crayfish. In accordance with earlier studies theresults of this investigation showed that deltamethrin is highly toxic for arthropods …
… biodiversity. In the Hall-Hangvar Reserve in the north-west part of Gotland, insects collected from traps showed that more species were found in old or dead trees compared to younger pine trees. A statistically significant difference was found for Coleoptera (beetles). The …
en jämförande studie av konsolidanter
Denna rapport är en jämförande studie av utvalda konsolidanter som används till att stabilisera nedbrutet insektsangripet trä. Av de trägnagande skadeinsekter vi har i Sverige är det främst den strimmiga trägnagaren som är intressant i möbelsammanhang. I rapporten beskrivs den …
… that the timing of planting, weed control, irrigation, fungicidal and insecticidal has had impact on the profitability of starch potato cultivation. But it is likely that the timing is nonetheless of great importance. In short, the important thing to keep track on is, kg starch …
timing och skördeanpassade åtgärder
… that the timing of planting, weed control, irrigation, fungicidal and insecticidal has had impact on the profitability of starch potato cultivation. But it is likely that the timing is nonetheless of great importance. In short, the important thing to keep track on is, kg starch …
… many Swedish ecosystems.Ants (belonging to the order Hymenoptera) are social insects which collect organic materialfrom a large area around their nests. This study focuses on the 137Cs activity in ant nests andthe cesium accumulation in these nests. The aims were (1) to estimate …
Dagens mjölkkor har kapacitet att producera stora mängder mjölk, men deras matsmältningssystem ser fortfarande likadant ut som när de producerade mjölk enbart till sin kalv. Detta innebär att de behöver foder med högt näringsvärde, eftersom de inte obegränsat kan öka …
comparisons with estimates of concentration addition and independent action
… estimations of the toxicity of mixtures. This study was aimed at testing three insecticides (pirimicarb, fenitrothion and esfenvalerate) neurotoxic to Daphnia magna in order to evaluate if synergistic, antagonistic or strictly additive effects occur when added together in a …
AbstractThe Northern Wheatear (Oenanthe oenanthe) is a small insectivorous passerine bird living in open landscapes. Both parents feed the brood of approximately five chicks, but little is known about how each sex allocates their feeding effort. In this study I investigate …
Due to the requirement for reduced use of insecticides and the lack of competitive mechanical plant protection, you need a scarification with good result. This is often no problem to perform in normal terrain without technical barriers. However, in difficult terrain with large …
skadeinventering och artbestämning
Sedan i början av 2000-talet har nordligaste Sverige drabbats hårt av törskateangrepp och det är konstaterat att skadorna framförallt har orsakats av den värdväxlande varianten C. flaccidum. I Sverige visade forskning i början av 1900-talet att flera arter från fjärilssläktet …
