Results 71 to 80 of about 338,339 (333)

A graduated nativeness definition for overcoming dilemmas and difficulties of vascular plant species

open access: yesOikos, EarlyView.
Nativeness is a concept central to biodiversity conservation and invasion biology, but there are several problems related to a classic binary nativeness definition. Dilemmas arise from the dynamic nature of species' distribution ranges on longer time scales, and difficulties arise in the application to smaller regions defined by arbitrary borders, and ...
Camilla T. Colding‐Jørgensen   +3 more
wiley   +1 more source

Biological control of pests in protected cultivation: implementation in Latin America and successes in Europe [PDF]

open access: yes
The area with greenhouse crops is estimated to be around 40,000 hectares in Latin America, of which approximately 60% is occupied with ornamentals. Several pests are responsible for losses in yield or quality of greenhouse crops production and pest ...
Bueno, V.H.P., Lenteren, J.C., van
core   +1 more source

Effect of Insecticides and Plutella xylostella (Lepidoptera: Plutellidae) Genotype on a Predator and Parasitoid and Implications for the Evolution of Insecticide Resistance [PDF]

open access: yes, 2017
In the laboratory and in cages in the greenhouse, we evaluated the toxicity of two insecticides (lambda-cyhalothrin and spinosad) on the parasitoid, Diadegma insulare (Cresson), and the predator, Coleomegilla maculate (DeGeer), both natural enemies of ...
Chen, Mao   +6 more
core  

Bottom–up and top–down drivers influence urbanization effects on insect herbivory in oaks

open access: yesOikos, EarlyView.
Urban forests provide essential ecosystem services, including pest control, biodiversity conservation, and human health benefits. Herbivory is a widespread biotic interaction that shapes ecosystem functions, such as primary productivity and soil fertility, which underpin these services.
Gabriela Quiroga   +18 more
wiley   +1 more source

Konceptuell modell  Övervakningsmetoder för naturliga fiender i relation till skadegörarförekomst, biologi och metodernas styrkor och svagheter [PDF]

open access: yes, 2017
A poster showing the relationship between major pests, key natural enemies and monitoring methods for natural enemies over a growing season.
Joakim, Pålsson   +3 more
core  

Meteorological versus spatial drivers of the spatial synchrony of forest insect pest outbreaks in North America

open access: yesOikos, EarlyView.
Spatial synchrony of population fluctuations has major consequences for the impacts of forest insect pest outbreaks at regional scales. We tested the predictions that the strength and drivers of this synchrony would differ among species according to their dispersal abilities and feeding guilds.
Kyle J. Haynes   +5 more
wiley   +1 more source

Functional agro biodiversity in Dutch arable farming: results of a three year pilot [PDF]

open access: yes, 2008
A pilot on 400 ha of Dutch arable farms during 2004-2007 perennial grassy field margins and functional annual flower strips were created on potato and wheat fields.
Alebeek, F.A.N., van   +2 more
core  

Species identity and spatial scale drive context‑dependent tree diversity effects in a Finnish forest experiment

open access: yesOikos, EarlyView.
Tree species diversity is known to affect tree growth and leaf traits, which in turn can influence various ecosystem processes. However, the reported direction of these tree diversity effects is inconsistent, indicating that their outcomes depend strongly on ecological context.
Juri A. Felix   +2 more
wiley   +1 more source

Wildflower strips to reduce lepidopteran pests in cabbage crops [PDF]

open access: yes, 2006
Vegetable production systems are highly intensive and the periodic cultivations lead to un-favourable conditions for natural enemies. Using non-crops it is possible to create ecological infra-structure offering suitable food for natural enemies, and ...
Lichtenhahn, Martin   +3 more
core  

Navigating the Rapids: How Non‐Governmental Organization Managers Develop Strategic Adaptation to Repressive Political Environments

open access: yesPublic Administration and Development, EarlyView.
ABSTRACT This article explores the management adaptation strategies non‐governmental organizations (NGOs) managers employ in order to operate in repressive political environments. It answers the question: how do NGO managers initiate, manage and sustain internal change when the political/regulatory environment changes?
Charles Kaye‐Essien   +2 more
wiley   +1 more source

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