Naslov
The Results of the Control of the Western Corn Rootworm (Diabrotica virgifera virgifera LeConte, Coleoptera: Chrysomelidae) of Maize in Croatia

Autori
Bažok, Renata ; Igrc-Barčić, Jasminka ; Edwards, C. Richard ; Gotlin Čuljak, Tanja

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

Izvornik
Proceedings of the 15^th International Plant Protection Congress. Plant Protection Towards 21^st Century / - Peking, 2004, 329-329

Skup
15^th International Plant Protection Congress

Mjesto i datum
Peking, Kina, 11.05.2004. - 16.05.2004

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
control; western corn rootworm; maize

Sažetak
Western corn rootworm (WCR) is a new pest of maize in Europe, as well as in Croatia. Previous research showed that chemical control of larvae is necessary in some cases to prevent feeding damage. In order to establish the efficacy of different insecticides and proper application methods, investigations were conducted between 1998-2002. Efficacy of 13 active ingredients applied at 33 different rates against WCR larvae in 15 field trials was investigated. Insecticides were applied at two times: at planting and cultivation. Planting-time insecticides were applied as seed treatments, as banded sprays and as granules in a 15 cm wide band, or for some insecticide as in-furrow treatments. Cultivation-time insecticides were applied as banded sprays and as granules in a 15 cm wide band. After application, the insecticides were lightly incorporated in the soil. The average root damage rating on untreated plots in 1998 was 1.65 which was below the economic threshold. In all other years average root ratings on untreated plots were over the economic threshold: 2.97 in 1999, 3.28 in 2000, 2.35 in 2001, and 2.95 in 2002. The majority of the insecticides significantly reduced root damage ratings below the economic threshold. Root damage ratings on treated plots varied from 1.11-1.3 in 1998, from 1.69-2.69 in 1999, from 1.75-2.56 in 2001, and from 1.63-2.09 in 2002. Test results showed that the application of the most frequently used soil insecticides can reduce the damage caused by WCR larvae, but the methods and terms of application should be based on the equipment and organizational possibilities of producers.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

Napomena
ISSN zbornika 9001-14001

POVEZANOST RADA