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Publikasjoner

NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.

2002

Abstract

Hoplothrips carpathicus Pelikán, 1961 er registrert for første gang i Norge. Tripsen ble funnet i stående døde bjørker med grov og sprukket bark, hvor den trolig lever av askomyceten Pseudospiropes longipilus. En stor mengde individer utvikles fra en enkelt bjørk.

Abstract

Vertpreferanse hos stengelboreren Busseola fusca ble undersøkt i laboratoriet og i feltforsøk i Halhale and Halhal Begos, Eritrea fra 1997 til 1999, på ni dyrkete og ville planter. Sudangras (Sorghum vulgare Pers. var. sudanense) hadde det høyeste angrepet (91 %) og var også den mest foretrukne vertplanten for egglegging. Den høyeste larvetettheten ble funnet på mais etterfulgt av sorghum. Perlehirse, fingerhirse, setaria-hirse og hvete hadde et lavere angrep og ga mindre næringsopptak hos larvene. Mulig bruk av sudangras som fangstplante er diskutert.

Abstract

Integrert bekjempelse av nematoder har som mål å stabilisere populasjonen av viktigere planteparasittære nematoder i en akseptabel populasjonsnivå som i langsiktig perspektiver bidrar til en positiv økonomi og en sundt miljø.

Abstract

In a greenery trial of Noble fir in western Norway, most branches had good quality until 1994 when 31 % of the branches were discarded. Since then a high level of losses has been noted and 87 % were discarded in 2000. A survey in 1998 revealed that the needle blight fungus Delphinella abietis was the main cause. It seems that frost did not initiate or maintain the disease in the stand, but generally low temperatures may have been important. Discarded branches with the fungus have been left on the ground and have probably been important in maintaining a high level of attack.

Abstract

Studies on beneficial fungi for the control of agricultural pests in Norway began in the early 1990s. The first studies were in connection with a Masters thesis. Development of this area of research was enhanced by a research fellowship to the USA and through Ph.D. studies. The establishment of a laboratory for insect pathology and much of the work done in Norway has been greatly aided by international cooperation.

Abstract

Meloidogyne chitwoodi may be introduced into Norway through plant material and soil. The nematode may easily establish on common crop plants. During the growing season two generations are expected to develop in southern Norway, while conditions in the central parts would allow for the development of one generation. M. chitwoodi starts to develop at 5ºC. Planting and sowing in Norway starts when soil temperatures reach around 4ºC. The use of plastic tunnels to increase soil temperature is a common practice in early potatoes and vegetables, and would enhance nematode development. M. chitwoodi requires 600-800 degree days (DD) to complete one generation from the time of planting, and 500-600 DD for subsequent generations. These temperature sums are commonly recorded in potato growing areas of Norway. Qualitative damage on potato tubers would require the reinfection and development of the second generation, and is expected in the southern areas. Qualitative damage on carrots does not require reinfection, and is expected also in central parts. The possibility that the nematode could cause damage to other vegetables and to cereals is an additional concern that supports its status as a quarantine pest organism.