Essays about: "natural enemies"

Showing result 1 - 5 of 52 essays containing the words natural enemies.

  1. 1. Population dynamics of the spruce bark beetle Ips typographus in forest conservation areas and the interaction with biodiversity and natural enemies

    University essay from SLU/Dept. of Ecology

    Author : Evelina Andersson; [2023]
    Keywords : spruce bark beetle; population dynamics; conservation areas; biodiversity; natural enemies; species richness; managed forests; woodland key-habitats; nature reserves;

    Abstract : Biodiversity is rapidly decreasing and in need of more conservation efforts. However, the tree-killing European spruce bark beetle, Ips typographus (L.), has made forest conservation controversial by affecting conservation areas and possibly adjoining managed forests, yet is still a keystone species leaving decaying wood promoting biodiversity. READ MORE

  3. 2. Emergence patterns of Ips typographus and Medetera spp. after overwintering in killed spruce trees

    University essay from SLU/Dept. of Ecology

    Author : Oliver Morén James; [2023]
    Keywords : Ips typographus; Medetera; M. signaticornis; M. pinicola; M. ambigua; emergence patterns;

    Abstract : Ips typographus (Coleoptera: Curculionidae, Scolytinae) is a pest species that mainly attacks Norway spruce (Picea abies L. Karst.) and can kill large volumes of spruce trees during outbreaks, leading to economic losses of great magnitude. A common practice to manage attacks is to remove recently killed trees and thereby remove the beetles. READ MORE

  4. 3. Höstraps + frostkänsliga baljväxter = sant? : en undersökning av samodlingseffekter på förekomsten av skadeinsekter

    University essay from SLU/Dept. of Plant Protection Biology

    Author : Madeléne Strandberg; [2023]
    Keywords : Brassica napus; samodling; Vicia faba; Trifolium alexandrinum; Brassicogethes aeneus; Ceutorhynchus obstrictus; Ceutorhynchus pallidactylus; Dasineura brassicae; parasitering;

    Abstract : Raps, Brassica napus, är en vanlig gröda som odlas främst som oljeväxt. Grödan har ett stort behov av kväve för fullgod tillväxt. READ MORE

  5. 4. Tritrophic interactions with Silphium integrifolium at the axis : elucidating the role of arbuscular mycorrhizal fungal species on plant phenotype

    University essay from SLU/Dept. of Plant Protection Biology

    Author : Philipp Hansen; [2023]
    Keywords : Arbuscular mycorrhiza; mycorrhizal responsiveness; induced plant volatiles; Silphium integrifolium Silflower ; perennial grains; new crops; ecological intensification;

    Abstract : A fundamental understanding of the intricate interactions between crops and their environment may help guide the development of ecologically intensified agriculture. Arbuscular mycorrhizal fungi (AMF) are root symbionts that can increase a plant’s access to soil resources and have been found to reprogram plant defensive mechanisms, potentially influencing the performance of plant antagonists. READ MORE

  6. 5. Granbarkborren i svenska produktionsskogar : vilka faktorer påverkar massutbrott och vilka åtgärder kan vidtas för att minska dem?

    University essay from SLU/Dept. of Biosystems and Technology (from 130101)

    Author : Fredrike Lohe; Sonja Otell; [2022]
    Keywords : Ips typographus; Picea abies; klimatförändringar; skadedjur; naturliga fiender; vattenstress; storm; skogsbruk; massattack;

    Abstract : Granbarkborren, Ips typographus, är en av få arter som kan öka drastiskt i populationsdensitet och leda till en omfattande dödlighet av träd i skogen. Skadorna år 2020 uppgick till ett värde på 3,5 miljarder kronor, vilket gör det värdefullt att försöka förstå varför dessa utbrott sker och vad för åtgärder som kan vidtas för att undvika dem. READ MORE