Essays about: "skadeinsekter"

Showing result 21 - 24 of 24 essays containing the word skadeinsekter.

1. 21. Flower attractiveness and nectar accessibility for Delia radicum (Diptera:Anthomyiidae) with implications for the control by Trybliographa rapae (Hymenoptera:Figitidae)

   University essay from SLU/Dept. of Plant Protection Biology

   Author : Linda-Marie Rännbäck; [2008]
   Keywords : conservation biological control; flower attractiveness; nectar accessibility; Delia radicum; Trybliographa rapae; Hymenoptera; parasitoid wasps; flower strips; selective biodiversity; floral food sources; Lobularia maritima; Anethum graveolens; Fagopyrum esculentum; olfactometer; volatile collection; GC-MS;

   Abstract : Conservation biological control aims at preserving populations of natural enemies in and around crop fields. Resources of floral nectar are important to natural enemies to increase the longevity, fecundity and motivation to seek host insects. READ MORE

3. 22. Possible changes in order to solve the pesticides problem : Spanish farmers and fruit exportation companies are looking for a solution

   University essay from SLU/Dept. of Economics

   Author : Salvador Rincón Amat; [2007]
   Keywords : management process; distrust; experience; biological control of plagues and production change.;

   Abstract : The pesticides use has increased in agriculture in Almeria (south-eastern Spain). At the same time the pesticides have become less efficient and rules have been made stricter. READ MORE

4. 23. Bekämpning av vita flygare (Aleurotrachelus socialis) i kassava (Manihot esculenta) : fysikaliskt verkande insektsmedel : mortalitet och appliceringsteknik

   University essay from SLU/Dept. of Landscape Architecture, Planning and Management (from 130101)

   Author : Miriam Frida Karlsson; [2006]
   Keywords : Aleurotrachelus socialis; Manihot esculenta; kontaktverkande insekticider; appliceringsteknik; munstycken;

   Abstract : The study was performed in southwest of Colombia in close collaboration with the interna-tional centre of tropical agriculture, CIAT and supervised from the university of Valle, Uni-valle, Cali, Colombia and from the Department of Landscape Management and Horticultural Technology, SLU, Alnarp, Sweden. The main purpose of this thesis was to evaluate six different non-conventional insecticides and their ability to control whitefly Aleurotrachelus socialis in cassava Manihot esculenta. READ MORE

5. 24. Wet storage of timber : Problems and solutions

   University essay from KTH/Industriell ekologi

   Author : Victoria Olsson; [2005]
   Keywords : ;

   Abstract : Syftet med timmerbevattning är att undvika angrepp av skadeinsekter, blånads- ochrötsvampar samt för att förebygga sprickbildning. Bevattningen leder till att en radförorenande ämnen urlakas, till största delen ur barken, vilket medför att man får ett lakvattensom kan förorena yt- och grundvatten i omgivningen om inga åtgärder vidtas. READ MORE