Naslov
Impact of different OSR production systems in Croatia on epigaeic active predators - preliminary results

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

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

Izvornik
International Organisation for Biological and Integrated Control of Noxious Animals and Plants - Abstracts / - , 2011

Skup
International Organisation for Biological and Integrated Control of Noxious Animals and Plant - working group on "Pesticides and beneficial organisms"

Mjesto i datum
Marbella, Španjolska, 07.11.2011. - 10.11.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
oilseed rape; predators; conventional; integrated and organic production

Sažetak
Oilseed rape in Croatia is grown on about 20000 ha with average yield of 3t/ha. Intensive tilling, overfertilization with nitrogen and use of insecticides have impact on biodiversity. The trial is set up on three different oilseed rape productions: conventional (ploughing, full seed dressing, intensive application of pesticides and fertilizers), integrated (mulching, no seed dressing, reduced input of pesticides and fertilizers, 3 m width trap crop strip along each side of the field) and organic (ploughing, no seed dressing, peas as pre-crop, entire field rounded with 3 m width trap crop strip, no fertilizers and pesticides applied). The aim of this research is to investigate impact of different oilseed rape production on apperance and abundance of predators (familiy Carabidae and Staphylinidae and order Aranea). Pitfall traps were used for monitoring epigaeic activity and sampling predatory arthropods. Eight traps were put on each system and on integrated and organic trap crop strip were put 4 additional traps. During 2010 monitoring was conducted from 22nd October till 21st December and in 2011 from 10th February till 30th June. Samples were taken once a week in 2010 and in 2011 every two weeks. In 2010 the most abundant group of predators in pitfall traps were the spiders (Arachnida: Araneae) with 12, 8 ind/trap in conventional, 14 ind/trap in integrated and 11, 4 ind/trap in organic. In integrated trap crop strip average number of spiders per trap was 8, 8 and in organic trap crop strip 10 ind/trap. In 2011 species from family Carabidae were the most abundant predator taxon with in total 11093 specimens which can be separated in 458, 9 ind/trap for the conventional treatment, 196, 5 ind/trap for integrated and 358, 8 ind/trap for the organic cultivation. In integrated trap crop strip average number of Carabidae per trap was 237, 3 and in organic trap crop strip 507, 8 ind/trap. Results of statistical analysis show that in pitfall traps in 2010 significantly higher number of Carabid species was in integrated trap crop strip then in other production systems. In 2011 significantly higher number of Aranea was in organic trap crop strip and of Staphylinidae in conventional production. There are no significant differences in number of Carabidae in all three systems. This is only one year investigation and it should be continued, in order to obtain comparable conclusions about impact of different oilseed rape productions on biodiversity of predators.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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