Naslov
Effects of different management systems on pest infestation of OSR in Croatia, Germany and Serbia

Autori
Büchs, Wolfgang ; Gotlin Čuljak, Tanja ; Sivčev, Ivan ; Prescher, Sabine ; Juran, Ivan ; Sivčev, Lazar ; Graora, Draga ; Grubišić, Dinka

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
IOBC-ICOC Working Group Meeting 2011, Göttingen - Abstracts / - , 2011

Skup
IOBC-ICOC Working Group Meeting 2011

Mjesto i datum
Göttingen, Njemačka, 04.10.2011. - 06.10.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
conventional; integrated and organic oilseed rape; pests

Sažetak
While Germany is one of the largest producer of OSR in Europe (1, 6 milion ha), OSR production is of increasing importance in Western Balkan Countries (WBC`s) where 20% of the area cultivated with arable crops is suitable for OSR production. Problems of OSR growing are N-overfertilization, intensive tillage and the use of pyrethroids and phosphoric acids due to pest resistance. Environmentally friendly production techniques are demanded. This EU project (SEE-ERA-NET.PLUS) targets on the within-field biodiversity. Besides classical aspects (species richness/composition) this project comprises functional aspects like biocontrol of pests by predators (Carabidae, Staphylinidae, Araneae) and turnover of plant residues by decomposers (earthworms). In Croatia and Serbia research on OSR is recently focused on general crop production and pest control. Nothing is known about within-field biodiversity of functional groups like epigaeic predators and decomposers. Organic OSR production is introduced the first time to Croatia and Serbia through this project. In a 2-year field experiment in each country the impact of three different managed OSR fields (conventional, advanced integrated, organic) on pests and on the biodiversity and fitness of predators and decomposers are investigated. The systems differ in tillage, fertilizer and pesticide input, weed control, row space and application of Brassica campestris-trap-crop-strips and are integrated in a crop rotation with winter wheat. The fields are covered by a grid of sampling points using different methods to asses predators (pitfall traps, endogaeic pitfall traps, emergence traps), decomposers (soil samples) and pests (bud/pod/stem samples). The experimental work will give impulses towards research activities which focus more on aspects of functional biodiversity especially in WBC`s. The project started in October 2010. First results on pest infestation will be presented here. In autumn seriuos pest attacks were only recorded by Athalia rosae in Serbia in October 2010. In Serbia organic OSR recovered after severe A.rosae infestation. Ceutorhynchus napi and C. pallidactylus, which immigrate into OSR fields in Germany in spring, occured in Croatian and Serbian OSR fields already in November. In all countries trap crop strips (in integrated and organic) with Perko (Brassica campestris x B. pekinensis) contributed to pull pests from the oilseed rape field stand, but its effect is limited if the pressure of pest insects exceeds a certain level and if there is no option to conduct an insecticide application. Thus, its function is optimal in combination with integrated crop management. Nevertheless, in Serbia organic OSR showed a great potential to recover regardless of an extreme level of pest attack, especially of Caoutrhynchus-stem weevils. In total, the first results indicate that despite climatic differences in the 3 countries, the soil quality and conditions as weel as the surroundings of OSR fields are key factor to determine the level of pest attack.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA