Search for dissertations about: "pest insects"
Showing result 1 - 5 of 18 swedish dissertations containing the words pest insects.
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1. Behaviour of Pine Sawflies in Relation to Pheromone-Based Pest Management
Abstract : Pine sawflies (Hymenoptera: Diprionidae) are severe pine defoliators. This thesis investigated sawfly behaviour related to the use of pheromones in integrated pest management, including monitoring with pheromone traps and mating disruption. READ MORE
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2. Population management of cone and seed insects in spruce seed orchards
Abstract : Seed orchards have been established in order to produce high quality seeds for reforestation and forestation. However, seed production in spruce (Picea abies (L.) Karst.) seed orchards is severely hampered by cone- and seed-feeding insects. READ MORE
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3. The importance of search behavior and movements for spatial distributions of herbivorous insects
Abstract : Insect populations commonly show large spatial variation in density, and much variation have been shown to be explained by the search behavior applied by the insect when locating habitat patches. This thesis explores the importance of odor-mediated attraction for immigration rates of herbivorous insects in relation to the size of the patches and the density of host plants within the patches. READ MORE
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4. Ecology and management of crop pollination and pest control : insights from red clover seed production
Abstract : The agricultural landscape has gone through large changes to meet increasing demands for food. This has led to major biodiversity declines, while effects on ecosystem services that support agricultural productivity, such as pollination and pest control, remain less studied. READ MORE
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5. The effect of temperature on trophic interactions : Implications for the population dynamics of a forest pest insect in a warmer climate
Abstract : Increase in temperature related to climate change will have consequences on the performance of organisms. Insects could be expected to respond more than other organism groups because they are ectotherms. READ MORE