Naslov
Population dynamics and sex ratio of adult forms of stem mining weevils in Croatia

Autori
Juran, Ivan ; Gotlin Čuljak, Tanja ; Grubišić, Dinka

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

Skup
IOBC-Working Group Integrated Control in Oilseed Crops

Mjesto i datum
Belvaux, Luksemburg, 08.10.2013. - 10.10.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
oilseed rape; stem mining weevils; population dynamic; sex ratio

Sažetak
In oilseed rape two stem weevil species occur, the cabbage stem weevil (Ceutorhynchus pallidactylus Marsham, 1802) and the rape stem weevil (C. napi Gyllenhal, 1837). Both are among the most important oilseed rape pests that appear in spring. The monitoring of appearance of stem mining weevils was conducted in period from 2010 to 2012. Four yellow water traps were set up in the field at the beginning of leaf development (BBCH 12). Samples were collected once a week until harvest. According to morphological marks on the legs, the sexes were determined. The first peak of the flight of cabbage stem weevil usually occurs in February and both sexes immigrate at the same time but in different proportions. Males and females of the rape stem weevil start to immigrate two to three weeks later in the spring and in lower abundance compared to the cabbage stem weevil. As a consequence of the different time of appearance and sex ratio, two insecticide applications are necessary for their successful control.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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