Agronomy journal, Vol. 71 No. 5-6, 2009.
Original scientific paper
RISK ASSESSMENET AGAINST WESTERN CORN ROOTWORM Diabrotica virgifera virgifera LeConte IN THE MOSLAVINA REGION
Darija Lemić
orcid.org/0000-0002-1175-3716
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Renata Bažok
orcid.org/0000-0003-1655-8140
; Agronomski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Abstract
Spreading of the Western Corn Rootworm, Diabrotica virgifera virgifera LeConte (WCR) all over the continental part of Croatia is endangering the maize production. This investigation was aimed at finding out of flight dynamics and WCR population in the fields of continuous sowing and the first year of maize sowing accompanied by PhAM yellow sticky traps and pheromone traps during 2007, in the Moslavina region and to asses the risk for maize if it will be coninuously sown on investigated fields. The research included eight fields, four fields of the continuous maize sowing and four fields
of the first corn sowing. In three fields continuous maize fields and three first year maize fields, yellow sticky traps (Pherocon AM- PhAM) were placed. Into one continuous and one first year maize field the pheromone traps were placed. The flight of WCR in 2007 in Moslavina region was very short. This was the consequence of the specific climatic conditions in spring of 2007. High temperature sin spring caused early development of larvae. The population was low on majority of investigated fields. The maximum weekly capture amounted to 1 speciman/PhAM trap/7 days which is rather low pests population, below the economic threshold level. The maximum weakly captures were recorded in July. In one continuous maize field the maximum weekly WCR occurrence amounted to 45.66 specimens/PhAM trap/7 days which is above the economic threshold level. In this field the risk against damage was established in the continuous maize sowing in 2008. Larval damage were not recorded. High capture was recorded on pheromone traps inspite of very short monitoring period. This implicates high population level in the whole area where the investigation was carried out.
Keywords
pheromones; corn; Western Corn Rootworm; Moslavina; Pherocon AM traps; risk assessment
Hrčak ID:
52052
URI
Publication date:
23.4.2010.
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