Population dynamics and sex ratio of adult forms of stem mining weevils in Croatia (CROSBI ID 600691)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Juran, Ivan ; Gotlin Čuljak, Tanja ; Grubišić, Dinka
engleski
Population dynamics and sex ratio of adult forms of stem mining weevils in Croatia
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.
oilseed rape; stem mining weevils; population dynamic; sex ratio
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Podaci o prilogu
2013.
objavljeno
Podaci o matičnoj publikaciji
Podaci o skupu
IOBC-Working Group Integrated Control in Oilseed Crops
predavanje
08.10.2013-10.10.2013
Belvaux, Luksemburg