52 uppsatser · sida 1 av 4
an evaluation of two microbiological control agents
… achieve at all times. Alternatives to chemical control of powdery mildews are biological control, physical control, non-fungicide control and cultivation of resistant or tolerant varieties. Biological control can be described as the suppression of damaging activities inflicted …
Biological pest management is defined as control of pests using their natural enemies. This method has been used in Sweden since the 1970´s and it has been developed ever since. Biological pest management is today relatively common among commercial growers but there are good …
biological control of thrips in cucumber
… mite, Amblydromalus limonicus, has been examined for its potential to use as a biological control agent in cucumber production. A. limonicus can be used for biological control of two thrips species, Frankliniella occidentalis and Thrips tabaci. Field trials were conducted in …
… an adequate control strategy before the Thrips population gets too large. Biological control is particularly hard to use because F. occidentalis develops very quickly while the reproduction of the natural enemies cannot keep up. Chemical control is also hard to use because …
does the bacteria Bacillus amyloliquefaciens affect the earthworm Aporrectodea longa?
… negative impacts on humans and environment are seen by the use of pesticides. Biological control agents are an alternative to the use of chemical pesticides, and plant-growth promoting rhizobacteria, such as Bacillus amyloliquefaciens has been shown to have good properties as …
… being developed. These include electric current, freezing, microwaves, biological control, etc.The present work is a literature review aiming at describing how a warmer and more humidclimate with a higher CO2 concentration will affect the need for weed control.Key words: climate …
… The results obtained suggest that compost has potential to function as biological control of V. longisporum.
biologi och icke-kemisk bekämpning
… shown to be a risky and often ineffective method of control. Trials regarding biological methods have shown that above others thistle rust (Puccinia punctiformis) may have the potential of controlling Canadian thistle the future.
växtgestaltning och planering
… do. The thesis deals with discourses in the field of landscape architecture, biological diversity, dam construction, limnology, planting design and management, pollution of the environment and urban design practice. The thesis implicates case studies, literature studies, botany …
… whether the diagnoses of ADHD and DAMP are social constructed problems or biological and genetic disorders. More specifically, our study was of a qualitative nature and consisted of interviews with seven persons working in six different professions within the educational system …
En fallstudie från åk 5
… regarding the source of ADHD that exist in Sweden today. The first is a biological perspective, which states that ADHD is passed on genetically, and the second is a sociological perspective, which states that ADHD is acquired through exposure to a range of social and …
… nitrogen and phosphorus removal. An increasing number of WWTP´s have acquired biological nitrogen and phos-phorus removal. A by-product of this type of biological treatment is the formation of nitrous oxide, which is a potent greenhouse gas. But how large is the WWTP´s share of …
Figitidae)
… commonly relying on chemical insecticides, though there are possibilities with biological control from the natural enemies in the field. An important natural enemy is the parasitic wasp, Trybliographa rapae Westwood (Hymenoptera: Figitidae) that lays eggs in the Delia fly …
… the mycelium while sexual ascospores form in asci in perithecia on debris. In biological control, living organsims are used to control pests and diseases. In this study, the effect of two biological control organisms, Clonostachys rosea and Pseudomonas chlororaphis was examined …
use of Bacillus subtilis and interactions with the earthworm Pontoscolex corethrurus in a Kenyan highland soil
It is important to investigate the potential of biological control measures in agricul-ture, especially where economic issues restrict the use of expensive inputs or when there are environmental concerns about toxicity of agrochemicals. The bacterium Bacillus subtilis has proved …
